diff --git a/README.md b/README.md
index 794f018..bb83333 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# j-elements
+# JElements
 
 > Proof-of-concept helpers and prototype web components
 
@@ -9,7 +9,7 @@
 
 ## Proof-of-concept helper elements and mixins
 
-See the documentation for `StylableMixin` and `TeleportingElement`.
+See the documentation for `LightStyleElement`, `StylableMixin` and `PortalElement`.
 
 
 
diff --git a/docs/app-layout.md b/docs/app-layout.md
index 72b0341..65f722f 100644
--- a/docs/app-layout.md
+++ b/docs/app-layout.md
@@ -1,4 +1,4 @@
-# App Layout <maturity-badge proto>(Prototype)</maturity-badge>
+# App Layout <maturity-badge preview>(Preview)</maturity-badge>
 
 The `<j-app-layout>` is a responsive application layout that covers multiple common application layout patterns.
 
diff --git a/docs/avatar.md b/docs/avatar.md
index e212d00..57f139a 100644
--- a/docs/avatar.md
+++ b/docs/avatar.md
@@ -1,4 +1,4 @@
-# Avatar <maturity-badge rfc>(Request for feedback)</maturity-badge>
+# Avatar <maturity-badge beta>(Beta)</maturity-badge>
 
 ### Default avatar
 
diff --git a/docs/card.md b/docs/card.md
index 01eccbc..b5c13aa 100644
--- a/docs/card.md
+++ b/docs/card.md
@@ -1,4 +1,4 @@
-# Card <maturity-badge proto>(Prototype)</maturity-badge>
+# Card <maturity-badge preview>(Preview)</maturity-badge>
 
 ### Simple card
 ```html,live
diff --git a/docs/dialog.md b/docs/dialog.md
index ee690fe..32a0dc2 100644
--- a/docs/dialog.md
+++ b/docs/dialog.md
@@ -1,8 +1,8 @@
 # Dialog <maturity-badge poc>(Proof of concept)</maturity-badge>
 
-A dialog is created using the `<j-dialog>` element. It is based on [Teleporting Element](/teleporting-element), and because of that will always show on top of other content, escaping any parent stacking contexts.
+A dialog is created using the `<j-dialog>` element. It is based on [Portal Element](/portal-element), and because of that will always show on top of other content, escaping any parent stacking contexts.
 
-Place any content you wish to show inside the dialog as the children, and use the `visible` attribute/property or the `show()` and `hide()` methods for opening and closing it.
+Place any content you wish to show inside the dialog as the children, and use the `show()` and `hide()` methods for opening and closing it.
 
 ```html
 <j-dialog visible>
@@ -17,12 +17,12 @@ Place any content you wish to show inside the dialog as the children, and use th
 Demonstrating how you can toggle the visibility of a dialog which has been created declaratively with HTML.
 
 ```html,live
-<button class="show-declarative">Open</button>
+<j-button class="show-declarative">Open</j-button>
 
 <j-dialog class="declarative">
   <h3>Declarative dialog</h3>
   <p>Dialog content.</p>
-  <button class="hide">Close</button>
+  <j-button class="hide">Close</j-button>
 </j-dialog>
 
 <script>
diff --git a/docs/field.md b/docs/field.md
index 9c98093..fac7df9 100644
--- a/docs/field.md
+++ b/docs/field.md
@@ -1,76 +1,72 @@
-# Field <maturity-badge proto>(Prototype)</maturity-badge>
+# Field <maturity-badge preview>(Preview)</maturity-badge>
+
+```javascript
+import {JField} from 'j-elements';
+```
 
 `<j-field>` is a wrapper element that allows you to add a label and an error message to any input element.
 
-### Text field
+It handles accessibility for you automatically, without the need to manually use `id` and `for` attributes to bind the label and the field, as well as showing validation error messages (and making them accessible as well).
+
+> The label is currently announces twice on VoiceOver on macOS Safari.
+
+## Label
 ```html,live
 <j-field>
   <label>Label</label>
-  <input type="text" required>
-  <p error-message>Error message</p>
+  <j-input></j-input>
 </j-field>
 ```
 
-### Text field (no label)
+## Required validation
 ```html,live
 <j-field>
-  <input type="text" required>
-  <p error-message>Error message</p>
+  <label>Label</label>
+  <j-input required minlength="3"></j-input>
 </j-field>
 ```
 
-### Text area
+## Pattern validation
 ```html,live
 <j-field>
-  <label slot="label">Label</label>
-  <textarea required></textarea>
-  <p error-message>Error message</p>
+  <label>Label</label>
+  <j-input pattern="[0-9]+"></j-input>
 </j-field>
 ```
 
-### Date field
-```html,live
-    <j-field>
-      <label slot="label">Label</label>
-      <input type="date" required>
-      <p error-message>Error message</p>
-    </j-field>
-```
-
-### Checkbox group
+## Custom error message
 ```html,live
 <j-field>
-  <label slot="label">Label</label>
-  <label><input type="checkbox"> Option</label>
-  <label><input type="checkbox" required> Option</label>
-  <p error-message>Error message</p>
+  <label>Label</label>
+  <j-input required error-message="You should really type something here"></j-input>
 </j-field>
 ```
 
-### Radio button group
+## Native text input
 ```html,live
 <j-field>
-  <label slot="label">Label</label>
-  <label><input type="radio" required> Option</label>
-  <label><input type="radio"> Option</label>
-  <label><input type="radio"> Option</label>
-  <p error-message>Error message</p>
+  <label>Label</label>
+  <input type="text" required pattern="[0-9]+">
 </j-field>
 ```
 
-### Slider
+## Native date input
 ```html,live
 <j-field>
-  <label slot="label">Label</label>
-  <input type="range">
+  <label>Choose a date</label>
+  <input type="date" required>
 </j-field>
 ```
 
-### Vaadin Text Field
+## Native select
 ```html,live
 <j-field>
-  <label slot="label">Label</label>
-  <vaadin-text-field required></vaadin-text-field>
-  <p error-message>Error message</p>
+  <label>Select an option</label>
+  <select required>
+    <option></option>
+    <option>Option one</option>
+    <option>Option two</option>
+    <option>Option three</option>
+  </select>
 </j-field>
 ```
diff --git a/docs/howto.md b/docs/howto.md
index 7437edf..21171a4 100644
--- a/docs/howto.md
+++ b/docs/howto.md
@@ -2,7 +2,7 @@
 
 ## Install
 
-j-elements is installable with [npm](https://npmjs.org) or any alternative npm client, like [Yarn](https://yarnpkg.com/en/):
+JElements is installable with [npm](https://npmjs.org) or any alternative npm client, like [Yarn](https://yarnpkg.com/en/):
 
 ```
 npm install j-elements
diff --git a/docs/icon.md b/docs/icon.md
index bc96506..1fd3315 100644
--- a/docs/icon.md
+++ b/docs/icon.md
@@ -1,4 +1,4 @@
-# Icon <maturity-badge rfc>(Request for feedback)</maturity-badge>
+# Icon <maturity-badge beta>(Beta)</maturity-badge>
 
 ## The problem
 
diff --git a/docs/input.md b/docs/input.md
new file mode 100644
index 0000000..0731638
--- /dev/null
+++ b/docs/input.md
@@ -0,0 +1,77 @@
+# Input <maturity-badge preview>(Preview)</maturity-badge>
+
+```javascript
+import {JInput} from 'j-elements';
+```
+
+## Problem
+
+The native `<input>` element is not styled consistently across different browsers and does not allow placing additional content inside it.
+
+## Solution
+
+`<j-input>` is a text input element which adds prefix and suffix element support, multi-line and autosizing (both horizontal and vertical) for the native `<input>` element.
+
+
+## Examples
+
+### Default configuration
+```html,live
+<j-input placeholder="Type here"></j-input>
+```
+
+### Autosize
+```html,live
+<j-input value="Auto width" autosize></j-input>
+```
+
+### Number input
+With prefix and suffix elements.
+```html,live
+<j-input value="123" type="number" autosize>
+  <span slot="start">$</span>
+  <span slot="end" style="margin-left: 0;">.00</span>
+</j-input>
+```
+
+### Multi-line
+Multi-line inputs are user-resizable by default in both directions. You can control this with the `resize` CSS property.
+```html,live
+<j-input multiline placeholder="Type a lot here"></j-input>
+```
+
+### Multi-line, autosize
+The autosizing multi-line input prevents user-resizing by default.
+```html,live
+<j-input multiline value="Auto\nheight" autosize></j-input>
+```
+
+## Styling
+
+The input can be styled similarly as the native `<input>` element, using border, background, padding, box-shadow, display, etc.
+
+The only exception is the `:focus` and `:focus-visible` pseudo-classes – use the `[focus]` and `[focus-visible]` state attributes instead.
+
+```html,live
+<j-input class="custom"></j-input>
+
+<style>
+  j-input.custom {
+    border-width: 2px;
+    background-color: #eee;
+    font-weight: bold;
+    padding: 0.8em 1em;
+    border-radius: 1em;
+  }
+
+  j-input.custom:hover {
+    border-color: #666;
+    background-color: #fff;
+  }
+
+  j-input.custom[focus] {
+    border-color: orange;
+    box-shadow: 0 0 0 4px yellow;
+  }
+</style>
+```
diff --git a/docs/maturity.md b/docs/maturity.md
index ae8ed97..24a6c13 100644
--- a/docs/maturity.md
+++ b/docs/maturity.md
@@ -1,6 +1,6 @@
 # Maturity Levels
 
-The components and utilities in this project are labelled with maturity level. The level indicates the varying goals and stages of development.
+The components and utilities in this project are labelled with a maturity level. The level indicates the varying goals and stages of development.
 
 ### Give feedback
 
@@ -14,14 +14,18 @@ The component/utility is testing a concept, a solution to a specific problem, h
 
 The component/utility is not recommended to be used directly in any production app, as it has not been thoroughly tested.
 
-## Prototype <maturity-badge proto>Prototype</maturity-badge>
+## Preview <maturity-badge preview>Preview</maturity-badge>
 
 The component/utility is in early stage development, and likely to go through major changes. The idea is that it will eventually be suitable for production use, once it has gone through proper testing and feedback rounds. Feedback about the API, performance and user experience is welcomed.
 
-## Request for feedback <maturity-badge rfc>Request for feedback</maturity-badge>
+## Beta <maturity-badge beta>Beta</maturity-badge>
 
 The component/utility seems to solve a specific problem and the solution looks like the right one. Now it’s time to try it out in a real application and provide feedback about any potential bugs or other smaller shortcomings.
 
 ## Stable <maturity-badge stable>Stable</maturity-badge>
 
 The component/utility has been tested and found to be a good solution and suitable for production use. There are no large issues regarding it’s use.
+
+## Deprecated <maturity-badge deprecated>Deprecated</maturity-badge>
+
+The component/utility did not evolve into a really useful thing, and the development of it has been discontinued.
diff --git a/docs/mutation-animation.md b/docs/mutation-animation.md
new file mode 100644
index 0000000..6d3c642
--- /dev/null
+++ b/docs/mutation-animation.md
@@ -0,0 +1,139 @@
+# Mutation Animation Mixin <maturity-badge poc>(Proof of concept)</maturity-badge>
+
+## Problem
+
+Animating inserted and, especially, removed elements is tricky. For inserted elements, a simple CSS Animation is enough, but you still want to clear the DOM after the animation has finished, not to pollute it with unnecessary class names or other attributes.
+
+Animating removed nodes is quite a bit more complex, as you need to keep the element in the DOM for the duration of the animation and only after that can you remove it from the DOM.
+
+These are doable, but require a lot of additional code when you would just want to call `appendChild`, `insertChild` and `removeChild` to manipulate a simple list of items.
+
+## Solution
+
+The `MutationAnimationMixin` helper manages all of the above for you. You only need to define the animation keyframes for the insert and remove states. `MutationObserver` is used to catch inserted and removed elements.
+
+For removed elements, a clone of the element is briefly re-inserted to the DOM for the duration of the animation. A clone is used to avoid any unexpected `connectedCallback` and `disconnectedCallback` calls for the removed element.
+
+The explicit width and height are set as the element’s inline styles for the duration of the animation (measured before the animation starts).
+
+> ###### NOTE
+>
+> You need to define the remove animation. Otherwise elements can not be removed completely (the cloned element will stay visible in the DOM).
+
+## Example
+
+First we create a new custom element using the mixin.
+
+```html
+<script type="module">
+  import {MutationAnimationMixin} from 'j-elements';
+
+  class MyList extends MutationAnimationMixin(HTMLElement) {}
+
+  customElements.define('my-list', MyList);
+</script>
+```
+
+Then we can use the new element and apply animations for inserted and removed elements.
+
+<div class="list-example"></div>
+```html,live
+<j-button id="add">Add item</j-button>
+<j-button id="remove">Remove item</j-button>
+<j-button id="add-remove">Add & remove items</j-button>
+
+<my-list>
+  <div>Item 1</div>
+  <div>Item 2</div>
+  <div>Item 3</div>
+  <div>Item 4</div>
+  <div>Item 5</div>
+</my-list>
+
+<style>
+  /* You can customize the class names and animation names if you want */
+
+  my-list .j-ma-insert,
+  my-list .j-ma-remove {
+    pointer-events: none;
+    overflow: hidden;
+    animation: j-ma-animation .4s ease-in-out;
+  }
+
+  my-list .j-ma-remove {
+    animation-direction: reverse;
+  }
+
+  @keyframes j-ma-animation {
+    0% {
+      height: 0;
+      opacity: 0;
+    }
+  }
+
+  /* Irrelevant styles, for the list and the items, are omitted from here */
+</style>
+
+<script>
+  const list = document.querySelector('my-list');
+  let i = list.children.length;
+
+  function addItem() {
+    const newItem = document.createElement('div');
+    newItem.textContent = 'Item ' + i++;
+
+    const items = list.querySelectorAll(`:not(.j-ma-remove)`);
+    const insertIndex = parseInt(Math.random() * items.length);
+
+    list.insertBefore(newItem, items[insertIndex]);
+  }
+
+  function removeItem() {
+    const items = list.querySelectorAll(`:not(.j-ma-remove)`);
+    if (items.length > 0) {
+      let removeIndex = parseInt(Math.random() * items.length);
+
+      list.removeChild(items[removeIndex]);
+    }
+  }
+
+  document.querySelector('#add').addEventListener('click', e => {
+    addItem();
+  });
+
+  document.querySelector('#remove').addEventListener('click', e => {
+    removeItem();
+  });
+
+  document.querySelector('#add-remove').addEventListener('click', e => {
+    addItem();
+    removeItem();
+  });
+</script>
+```
+
+<style>
+my-list {
+  display: block;
+  border: 1px solid #ddd;
+  margin-top: 1em;
+  max-height: 60vh;
+  overflow: auto;
+}
+
+my-list div {
+  display: flex;
+  align-items: center;
+  height: 44px;
+  padding: 0 1em;
+  box-sizing: border-box;
+}
+
+my-list div:not(:last-child) {
+  box-shadow: inset 0 -1px 0 0 #ddd;
+}
+
+.list-example + .demo-snippet .demo-snippet__code .hljs {
+  max-height: 40em;
+}
+</style>
diff --git a/docs/portal-element.md b/docs/portal-element.md
new file mode 100644
index 0000000..89ee9a9
--- /dev/null
+++ b/docs/portal-element.md
@@ -0,0 +1,35 @@
+# Portal Element <maturity-badge poc>(Proof of concept)</maturity-badge>
+
+## Problem
+
+Showing an element on top of all other content on the page regardless of its position in the element hierarchy is sometimes tricky.
+
+Unless you know the full hierarchy “above” the element that needs to be shown on top of all others, you have to be prepared that there might be a clipping stacking context somewhere in the hierarchy which ends up clipping your element.
+
+The problem is most apparent when creating a reusable overlay element.
+
+## Solution
+
+Most often, this problem is solved by declaring such elements directly under the `<body>` element, which guarantees they are inside the topmost stacking context on the page. This makes it tricky to manage the elements when building modular applications.
+
+The Portal Element utility (base class) allows you to define an element anywhere in the hierarchy and, when enabled, move itself (and its contents) under the `<body>` element.
+
+> Unlike the previous iteration, Teleporting Element, Portal Element does support one level of nested `<slot>` elements, making it more versatile in compositions.
+
+## Limitations
+
+- When the element `disabled` property is toggled the `disconnectedCallback` and `connectedCallback` are called on the main element as well as on all the child elements
+- The content is “live” (i.e. parsed and executed) even when it is not show to the user. This is similar how for example [`<paper-dialog>`](https://www.webcomponents.org/element/PolymerElements/paper-dialog) works.
+- Wrapping the content in a `<template>` would save browser resources and bandwidth and prevent scripts from executing before the content is made visible.
+- CSS selectors do not work across the element boundary. You can’t style the element or its children using a parent selector, f.e. `.parent-class .portal-element .child`. You should target the element directly, f.e. `.portal-element .child`.
+- `querySelector` and `querySelectorAll` do not work across the element boundary, f.e.
+  ```javascript
+  // Does not work
+  querySelector('.parent-class .portal-element .child');
+  ```
+
+  You need to have a reference to the element itself before accessing any child elements, f.e.
+  ```javascript
+  // Works
+  querySelector('.parent-class .portal-element').querySelector('.child');
+  ```
diff --git a/docs/stylable-mixin.md b/docs/stylable-mixin.md
index 76854d5..b691bae 100644
--- a/docs/stylable-mixin.md
+++ b/docs/stylable-mixin.md
@@ -1,12 +1,12 @@
-# Stylable Mixin <maturity-badge poc>(Proof of concept)</maturity-badge>
+# Stylable Mixin <maturity-badge preview>(Preview)</maturity-badge>
 
 `StylableMixin` is basically a more versatile replacement for [`Vaadin.ThemableMixin`](https://github.com/vaadin/vaadin-themable-mixin/), and does not depend on Polymer. It allows the user of the web component to inject custom styles inside the component’s shadow root (allowing theming).
 
 #### Benefits
 - You can style individual component instances (scoped) in addition to all instances of a component (global)
-- Less boilerplate: just two attributes for the standard `<style>` element:
+- Less boilerplate: just one attribute for the standard `<style>` element:
   ```html
-  <style type="global" for="my-component">
+  <style media="my-component">
     /* CSS for component's shadow DOM */
   </style>
   ```
@@ -41,7 +41,7 @@ Both `StylableMixin` and `ThemableMixin` are temporary solutions until the web p
 `StylableMixin` allows you to easily inject styles into a web component’s shadow DOM from the same style scope where a component instance is used:
 
 ```html,live
-<style type="scoped" for=".special-card">
+<style media=".special-card">
   [part="title"] {
     color: red;
   }
@@ -66,26 +66,26 @@ You can also inject styles from the global scope into any other scope (a.k.a. th
 <!-- This style module (when placed in the global scope)
   will be used by all <j-card> instances (you can see it
   being applied for the cards in the above example) -->
-<style type="global" for="j-card">
+<style media="j-card">
   :host {
     border: 2px dotted;
     margin-bottom: 1em;
   }
 </style>
 ```
-<style type="global" for="j-card">
+<style media="j-card">
   :host {
     border: 2px dotted;
     margin-bottom: 1em;
   }
 </style>
 
-## Making a component stylable
+## How to make a component stylable
 
 To make a component “stylable”, extend it with the mixin, and call `super.connectedCallback()` in the component’s `connectedCallback()`:
 
 ```javascript
-import { StylableMixin } from './node_modules/j-elements/src/stylable-mixin.js';
+import { StylableMixin } from 'j-elements';
 
 class XStylable extends StylableMixin(HTMLElement) {
   constructor() {
diff --git a/docs/teleporting-element.md b/docs/teleporting-element.md
index a8ffc5c..bac4a19 100644
--- a/docs/teleporting-element.md
+++ b/docs/teleporting-element.md
@@ -1,4 +1,6 @@
-# Teleporting Element <maturity-badge poc>(Proof of concept)</maturity-badge>
+# Teleporting Element <maturity-badge deprecated>(Deprecated)</maturity-badge>
+
+> This utility is deprecated. Consider using `PortalElement` instead, which is an improved iteration of the same concept.
 
 A teleporting element can escape any stacking context, by moving itself directly under the `<body>` element when set “visible”.
 
diff --git a/docs/tooltip.md b/docs/tooltip.md
index 0bda37b..9e2776a 100644
--- a/docs/tooltip.md
+++ b/docs/tooltip.md
@@ -1,6 +1,6 @@
-# Tooltip <maturity-badge proto>(Proto)</maturity-badge>
+# Tooltip <maturity-badge preview>(Preview)</maturity-badge>
 
-A tooltip component based on [Teleporting Element](/teleporting-element), allowing it to escape any stacking contexts.
+A tooltip component based on [Portal Element](/portal-element), allowing it to escape any stacking contexts.
 
 > **Note:** j-tooltip does not handle accessibility in any special way, for example make sure screen readers announce the tooltip content when it’s shown.
 
@@ -52,19 +52,8 @@ A tooltip component based on [Teleporting Element](/teleporting-element), allowi
   <j-tooltip class="lumo">Tooltip styled with Lumo properties</j-tooltip>
 </div>
 
-<!--
-  Import the following modules after installing the 'vaadin-lumo-styles'
-  package to use Lumo CSS properties:
-
-  <script type="module">
-    import '@vaadin/vaadin-lumo-styles/style.js';
-    import '@vaadin/vaadin-lumo-styles/color.js';
-    import '@vaadin/vaadin-lumo-styles/typography.js';
-  </script>
--->
-
-<style type="scoped" for="j-tooltip.lumo">
-  :host {
+<style>
+  j-tooltip.lumo {
     box-shadow: var(--lumo-box-shadow-s);
     background-color: var(--lumo-contrast-80pct);
     color: var(--lumo-base-color);
diff --git a/elements.js b/elements.js
index 59e6640..9e51c49 100644
--- a/elements.js
+++ b/elements.js
@@ -1,25 +1,36 @@
-import {JAppLayout} from './src/j-app-layout.js';
-import {JAvatar} from './src/j-avatar.js';
-import {JCard} from './src/j-card.js';
-import {JDialog} from './src/j-dialog.js';
-import {JField} from './src/j-field.js';
-import {JIcon} from './src/j-icon.js';
-import {JPlaceholder} from './src/j-placeholder.js';
-import {JTooltip} from './src/j-tooltip.js';
-import {StylableMixin} from './src/stylable-mixin.js';
-import LightStyleElement from './src/light-style-element.js';
-import TeleportingElement from './src/teleporting-element.js';
+// Components (custom elements)
+import {JAppLayout} from './src/components/j-app-layout.js';
+import {JAvatar} from './src/components/j-avatar.js';
+import {JButton} from './src/components/JButton.js';
+import {JCard} from './src/components/j-card.js';
+import {JDialog} from './src/components/j-dialog.js';
+import {JField} from './src/components/JField.js';
+import {JIcon} from './src/components/JIcon.js';
+import {JInput} from './src/components/JInput.js';
+import {JPlaceholder} from './src/components/j-placeholder.js';
+import {JTooltip} from './src/components/j-tooltip.js';
+
+// Utilities
+import LightStyleElement from './src/util/LightStyleElement.js';
+import MutationAnimationMixin from './src/util/MutationAnimationMixin.js';
+import PortalElement from './src/util/PortalElement.js';
+import StylableMixin from './src/util/StylableMixin.js';
+import TeleportingElement from './src/util/teleporting-element.js';
 
 export {
   JAppLayout,
   JAvatar,
+  JButton,
   JCard,
   JDialog,
   JField,
   JIcon,
+  JInput,
   JPlaceholder,
   JTooltip,
-  StylableMixin,
   LightStyleElement,
+  MutationAnimationMixin,
+  PortalElement,
+  StylableMixin,
   TeleportingElement
 };
diff --git a/package-lock.json b/package-lock.json
index 613fe97..fcd3390 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,5 +1,5 @@
 {
   "name": "j-elements",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "lockfileVersion": 1
 }
diff --git a/package.json b/package.json
index 4d3ce60..ef832ed 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "j-elements",
-  "version": "0.2.1",
+  "version": "0.3.0",
   "homepage": "https://jelements.netlify.com",
   "repository": "https://github.com/jouni/j-elements",
   "authors": [
diff --git a/site/index.html b/site/index.html
index 8a521d3..02d759c 100644
--- a/site/index.html
+++ b/site/index.html
@@ -5,8 +5,8 @@
     <meta name="viewport" content="width=device-width, minimum-scale=1, initial-scale=1, user-scalable=yes, viewport-fit=cover">
     <meta name="apple-mobile-web-app-status-bar-style" content="default">
 
-    <title>j-elements docs and demos</title>
-    <meta name="description" content="Documentation and examples for the j-elements project">
+    <title>JElements docs and demos</title>
+    <meta name="description" content="Documentation and examples for the JElements project">
 
     <!-- See https://goo.gl/OOhYW5 -->
     <link rel="manifest" href="/manifest.json">
@@ -21,8 +21,6 @@
     <j-site></j-site>
   </body>
 
-  <script src="/node_modules/particlesjs/dist/particles.min.js"></script>
-
   <script async src="https://www.googletagmanager.com/gtag/js?id=UA-259049-6"></script>
   <script>
     window.dataLayer = window.dataLayer || [];
diff --git a/site/manifest.json b/site/manifest.json
index 9283f52..37f3802 100644
--- a/site/manifest.json
+++ b/site/manifest.json
@@ -1,7 +1,7 @@
 {
-  "name": "j-elements docs and demos",
-  "short_name": "j-elements docs and demos",
-  "description": "Documentation and examples for the j-elements project",
+  "name": "JElements docs and demos",
+  "short_name": "JElements docs and demos",
+  "description": "Documentation and examples for the JElements project",
   "start_url": "/",
   "display": "standalone"
 }
diff --git a/site/package-lock.json b/site/package-lock.json
index c8c4a52..aa295bf 100644
--- a/site/package-lock.json
+++ b/site/package-lock.json
@@ -4,105 +4,105 @@
   "lockfileVersion": 1,
   "dependencies": {
     "@polymer/iron-flex-layout": {
-      "version": "3.0.0-pre.21",
-      "resolved": "https://registry.npmjs.org/@polymer/iron-flex-layout/-/iron-flex-layout-3.0.0-pre.21.tgz",
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+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/@polymer/iron-flex-layout/-/iron-flex-layout-3.0.1.tgz",
+      "integrity": "sha512-7gB869czArF+HZcPTVSgvA7tXYFze9EKckvM95NB7SqYF+NnsQyhoXgKnpFwGyo95lUjUW9TFDLUwDXnCYFtkw==",
       "requires": {
         "@polymer/polymer": "^3.0.0"
       }
     },
     "@polymer/iron-icon": {
-      "version": "3.0.0-pre.21",
-      "resolved": "https://registry.npmjs.org/@polymer/iron-icon/-/iron-icon-3.0.0-pre.21.tgz",
-      "integrity": "sha512-B/6ncM/JiKYOCkYtIsgztZuMzmMWAR5POGQ0r7TU0RaBzKstqTvn6NfRHeNzYjsOwBMse/wA6/qvgvCRgx6kWw==",
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/@polymer/iron-icon/-/iron-icon-3.0.1.tgz",
+      "integrity": "sha512-QLPwirk+UPZNaLnMew9VludXA4CWUCenRewgEcGYwdzVgDPCDbXxy6vRJjmweZobMQv/oVLppT2JZtJFnPxX6g==",
       "requires": {
-        "@polymer/iron-flex-layout": "^3.0.0-pre.21",
-        "@polymer/iron-meta": "^3.0.0-pre.21",
+        "@polymer/iron-flex-layout": "^3.0.0-pre.26",
+        "@polymer/iron-meta": "^3.0.0-pre.26",
         "@polymer/polymer": "^3.0.0"
       }
     },
     "@polymer/iron-iconset-svg": {
-      "version": "3.0.0-pre.21",
-      "resolved": "https://registry.npmjs.org/@polymer/iron-iconset-svg/-/iron-iconset-svg-3.0.0-pre.21.tgz",
-      "integrity": "sha512-YWdX3QROFHKsGds9wUDbD2u1hN6uG6oG4fEu/F16aHFQg9tu2oiSyRspGsOQlXJ28177Qc2rxQ1Kp8GdlzpMbw==",
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/@polymer/iron-iconset-svg/-/iron-iconset-svg-3.0.1.tgz",
+      "integrity": "sha512-XNwURbNHRw6u2fJe05O5fMYye6GSgDlDqCO+q6K1zAnKIrpgZwf2vTkBd5uCcZwsN0FyCB3mvNZx4jkh85dRDw==",
       "requires": {
-        "@polymer/iron-meta": "^3.0.0-pre.21",
+        "@polymer/iron-meta": "^3.0.0-pre.26",
         "@polymer/polymer": "^3.0.0"
       }
     },
     "@polymer/iron-meta": {
-      "version": "3.0.0-pre.21",
-      "resolved": "https://registry.npmjs.org/@polymer/iron-meta/-/iron-meta-3.0.0-pre.21.tgz",
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+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/@polymer/iron-meta/-/iron-meta-3.0.1.tgz",
+      "integrity": "sha512-pWguPugiLYmWFV9UWxLWzZ6gm4wBwQdDy4VULKwdHCqR7OP7u98h+XDdGZsSlDPv6qoryV/e3tGHlTIT0mbzJA==",
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+      "resolved": "https://registry.npmjs.org/@polymer/iron-resizable-behavior/-/iron-resizable-behavior-3.0.1.tgz",
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-      "resolved": "https://registry.npmjs.org/@polymer/polymer/-/polymer-3.0.2.tgz",
-      "integrity": "sha512-ow8AAjTe9ps8bantY9IvL0PT+xHf5VN3Cjahfr7gBJAc0lv3jTwGBv7pso65SHyrUJEEHeakhx6iPMl7qY4tfw==",
+      "version": "3.3.0",
+      "resolved": "https://registry.npmjs.org/@polymer/polymer/-/polymer-3.3.0.tgz",
+      "integrity": "sha512-rij7suomS7DxdBamnwr/Xa0V5hpypf7I9oYKseF2FWz5Xh2a3wJNpVjgJy1adXVCxqIyPhghsrthnfCt7EblsQ==",
       "requires": {
-        "@webcomponents/shadycss": "^1.2.0"
+        "@webcomponents/shadycss": "^1.9.1"
       }
     },
     "@vaadin/router": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/@vaadin/router/-/router-1.1.0.tgz",
-      "integrity": "sha512-7fC7bSEFeswCKcbrJELnsTJVNKlrUGkB7P7daxumNGCEZM9JzabJtazItFzjNYm49PX9UsKxLZ2X11120EoS7g==",
+      "version": "1.4.2",
+      "resolved": "https://registry.npmjs.org/@vaadin/router/-/router-1.4.2.tgz",
+      "integrity": "sha512-BT9cZulygDhX4ylow//eG1lkplotsTDRTqnVit4mSSw8Z1OE8igioVzB2XYWJ/JIhB/vGCIp00RoV+XRc4EBoQ==",
       "requires": {
-        "@vaadin/vaadin-usage-statistics": "^2.0.1",
-        "path-to-regexp": "2.2.1"
+        "@vaadin/vaadin-usage-statistics": "^2.0.8",
+        "path-to-regexp": "2.4.0"
       }
     },
     "@vaadin/vaadin-checkbox": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-checkbox/-/vaadin-checkbox-2.2.1.tgz",
-      "integrity": "sha512-6xWaFY6pINdCK1bM3Kpn1NbEE/rlbgSMEE4rHd3Hf0uowjJa6caGECEK0GoG2a756rWQOX7JiwtjtF4IgHcR+A==",
+      "version": "2.2.10",
+      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-checkbox/-/vaadin-checkbox-2.2.10.tgz",
+      "integrity": "sha512-eRJakdHnheemwoed0FeSVYkksuzOeArUUYpmLWesb+AMUoVeOMswbR21BmAEPOOqLWOeSXXbCfNMmqvidNNTQw==",
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         "@vaadin/vaadin-control-state-mixin": "^2.1.1",
         "@vaadin/vaadin-element-mixin": "^2.0.0",
-        "@vaadin/vaadin-lumo-styles": "^1.1.0-beta1",
-        "@vaadin/vaadin-material-styles": "^1.1.0-beta1",
+        "@vaadin/vaadin-lumo-styles": "^1.2.0",
+        "@vaadin/vaadin-material-styles": "^1.2.0",
         "@vaadin/vaadin-themable-mixin": "^1.2.1"
       }
     },
     "@vaadin/vaadin-control-state-mixin": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-control-state-mixin/-/vaadin-control-state-mixin-2.1.1.tgz",
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+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-control-state-mixin/-/vaadin-control-state-mixin-2.1.3.tgz",
+      "integrity": "sha512-EtLfMN9i/gwToAEuW6E1OA2Q2i/4a+Il6tKkqE/0i7bgu3Xr1IITMcagQn9QSsp1Xkpr/nLtWWKRq7yZZkbHVg==",
       "requires": {
         "@polymer/polymer": "^3.0.0"
       }
     },
     "@vaadin/vaadin-development-mode-detector": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-development-mode-detector/-/vaadin-development-mode-detector-2.0.0.tgz",
-      "integrity": "sha512-pzSaUqn+lJbTL2ZC6NCAfhyMymMYg2p4DzeUXdyInJISwSWmgh9RlRVpAGhi6MIUOKC7kGeKPAiB4vyWsEhzDg=="
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-development-mode-detector/-/vaadin-development-mode-detector-2.0.4.tgz",
+      "integrity": "sha512-S+PaFrZpK8uBIOnIHxjntTrgumd5ztuCnZww96ydGKXgo9whXfZsbMwDuD/102a/IuPUMyF+dh/n3PbWzJ6igA=="
     },
     "@vaadin/vaadin-element-mixin": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-element-mixin/-/vaadin-element-mixin-2.1.1.tgz",
-      "integrity": "sha512-L5kTcdIenB9yYTWSgZnseLErmWl/aTw+z+zUHSxz8JNd352CzAFKZpnIOLwUHjYcxitMzQtpVWey0tiDY0xleg==",
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-element-mixin/-/vaadin-element-mixin-2.1.3.tgz",
+      "integrity": "sha512-tCEdrS5JMIl9ZsyjnV28XI2AFLC35RUWRF6XPrvm/MpKAxWLk1MlYrkwR26avOuSqvNwCBO56NIDN2k1yYC4eA==",
       "requires": {
         "@polymer/polymer": "^3.0.0",
         "@vaadin/vaadin-development-mode-detector": "^2.0.0",
-        "@vaadin/vaadin-usage-statistics": "^2.0.1"
+        "@vaadin/vaadin-usage-statistics": "^2.0.2"
       }
     },
     "@vaadin/vaadin-item": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-item/-/vaadin-item-2.1.0.tgz",
-      "integrity": "sha512-OgHDWghreIYbvCc9vaNcGteg796CO99N8NFfjqAsAF75cHKdwWfPLylrYZSebk/PCFdKCQauSQXXRVU3uqzyBg==",
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-item/-/vaadin-item-2.1.1.tgz",
+      "integrity": "sha512-uWwsSDoOtjiiHjmEANP29JMacJoSeO5kHCTYyqdVu0fQoT6WalLV1aQWIEJUmVSp2MnB3qRziYpAw3igF9uXxw==",
       "requires": {
         "@polymer/polymer": "^3.0.0",
         "@vaadin/vaadin-lumo-styles": "^1.1.0",
@@ -111,37 +111,37 @@
       }
     },
     "@vaadin/vaadin-list-mixin": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-list-mixin/-/vaadin-list-mixin-2.1.0.tgz",
-      "integrity": "sha512-++eOWyrYVVzudIJ3Y/F+WXECWE6DFw7QgakDqSZAgmfLZVV/Gtz9lR5eIIh4skhsGqKYafCv+M3exhFeB8f+nA==",
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-list-mixin/-/vaadin-list-mixin-2.2.1.tgz",
+      "integrity": "sha512-63WuVvcai+sLbjPlBmjvI8O9obUCGKDDJwzPBmAaAv3EemyBwaavcBTpDkfWKEJAWU3tCFQmk4MSFsa3ZUCc0Q==",
       "requires": {
         "@polymer/polymer": "^3.0.0"
       }
     },
     "@vaadin/vaadin-lumo-styles": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-lumo-styles/-/vaadin-lumo-styles-1.1.1.tgz",
-      "integrity": "sha512-fE0i4jhK5EwlXt0rkjESdK1BzMkQhm0/eLQn5bmy3ydlLNp6XRRWImK6fGD5zywVkt84F9ysT/3hLodGGNSluQ==",
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-lumo-styles/-/vaadin-lumo-styles-1.5.0.tgz",
+      "integrity": "sha512-9e9n7rH5IlzsAhRWvBt6C8roXbdNILKyKMJPwbN9I6zsPwzFhG5y2y5IY59Q5Ijj8aXvHuLV+Icjogc+2KU5fg==",
       "requires": {
-        "@polymer/iron-icon": "^3.0.0-pre.18",
-        "@polymer/iron-iconset-svg": "^3.0.0-pre.18",
+        "@polymer/iron-icon": "^3.0.0",
+        "@polymer/iron-iconset-svg": "^3.0.0",
         "@polymer/polymer": "^3.0.0"
       }
     },
     "@vaadin/vaadin-material-styles": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-material-styles/-/vaadin-material-styles-1.1.2.tgz",
-      "integrity": "sha512-HUbDNX7PhDNfL+CBDAyFB2tzh0G08QQ0hxCgXv+prbfJUqTbaycdaKvSs4XzYKT4avZ7OayYKJld2TnF91qlzQ==",
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-material-styles/-/vaadin-material-styles-1.2.3.tgz",
+      "integrity": "sha512-hWtnfNPANPU3UJmyIXuu2pH8R60LtnUzTZ0o2lupvxyc5IR0qFZMnB1m0xQBdBTje44xxCRaHeJATrwpzsOeMQ==",
       "requires": {
         "@polymer/polymer": "^3.0.0"
       }
     },
     "@vaadin/vaadin-tabs": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-tabs/-/vaadin-tabs-2.1.0.tgz",
-      "integrity": "sha512-l3dQNgPfmdlO0B5juTNHrL2rcgVzNWEfzUbuQdFkyMiL0OyDEgc7/+BuIXM6bIi7uKotwXFGOtIjFqRhVnzQJA==",
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-tabs/-/vaadin-tabs-2.1.2.tgz",
+      "integrity": "sha512-ZBFqs2Ve5rEtBzLMXvygYnGg8q9jgY3z23rJhOjaXGN3TKEWAF39e4phgykt6LHdooD0xILOvJ6Yp3mxJQlIjQ==",
       "requires": {
-        "@polymer/iron-resizable-behavior": "^3.0.0-pre.18",
+        "@polymer/iron-resizable-behavior": "^3.0.0",
         "@polymer/polymer": "^3.0.0",
         "@vaadin/vaadin-element-mixin": "^2.0.0",
         "@vaadin/vaadin-item": "^2.1.0",
@@ -152,1278 +152,1565 @@
       }
     },
     "@vaadin/vaadin-text-field": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-text-field/-/vaadin-text-field-2.1.1.tgz",
-      "integrity": "sha512-+RfHIySQt/3UmzuJojDc8ChZt8EXbubMnzbCyuSDezLdnl/CQgkw2EjLdKT8Y6W23tkhGyN5D7vC0NoujNWcqg==",
+      "version": "2.4.11",
+      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-text-field/-/vaadin-text-field-2.4.11.tgz",
+      "integrity": "sha512-3AOfU7WBQjqQTnPS9SiVAXcTYmYWoKYciwEeWpRNfr+njrzy5ymQZlCUz1dfzF5+zVaz6W4Cbxd76TbTmQn68w==",
       "requires": {
         "@polymer/polymer": "^3.0.0",
         "@vaadin/vaadin-control-state-mixin": "^2.1.1",
         "@vaadin/vaadin-element-mixin": "^2.0.0",
-        "@vaadin/vaadin-lumo-styles": "^1.1.0-beta1",
-        "@vaadin/vaadin-material-styles": "^1.1.0-beta1",
+        "@vaadin/vaadin-lumo-styles": "^1.2.0",
+        "@vaadin/vaadin-material-styles": "^1.2.0",
         "@vaadin/vaadin-themable-mixin": "^1.2.1"
       }
     },
     "@vaadin/vaadin-themable-mixin": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-themable-mixin/-/vaadin-themable-mixin-1.2.1.tgz",
-      "integrity": "sha512-5mWCS/Xv2A2pFLtTSNcXl6VuUklihhXfm8JY5MzVaRRg4idYhRroDGIILGTa3NaMDWC9BaTWJgNa+g9rkMKMXQ==",
+      "version": "1.4.4",
+      "resolved": "https://registry.npmjs.org/@vaadin/vaadin-themable-mixin/-/vaadin-themable-mixin-1.4.4.tgz",
+      "integrity": "sha512-S/zN0DvSQ3cy1PdH0Dfa2yQirIFQKWCC3o0YdBzrKVCGvi5QW8+IqBTDFKnIaOfWjYoHsw2eunWcg9pu2jlI1Q==",
       "requires": {
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     },
     "@vaadin/vaadin-usage-statistics": {
-      "version": "2.0.1",
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+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+    },
+    "zip-stream": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/zip-stream/-/zip-stream-2.1.2.tgz",
+      "integrity": "sha512-ykebHGa2+uzth/R4HZLkZh3XFJzivhVsjJt8bN3GvBzLaqqrUdRacu+c4QtnUgjkkQfsOuNE1JgLKMCPNmkKgg==",
+      "requires": {
+        "archiver-utils": "^2.1.0",
+        "compress-commons": "^2.1.1",
+        "readable-stream": "^3.4.0"
+      }
     }
   }
 }
diff --git a/site/package.json b/site/package.json
index 75203fc..a971443 100644
--- a/site/package.json
+++ b/site/package.json
@@ -1,18 +1,20 @@
 {
   "name": "j-elements-site",
-  "description": "Documentation and examples for the j-elements project",
+  "description": "Documentation and examples for the JElements project",
   "dependencies": {
-    "@polymer/polymer": "^3.0.0",
-    "@vaadin/router": "^1.0.1",
-    "@vaadin/vaadin-checkbox": "^2.2.0",
-    "@vaadin/vaadin-lumo-styles": "^1.0.0",
-    "@vaadin/vaadin-tabs": "^2.1.0",
-    "@vaadin/vaadin-text-field": "^2.1.1",
-    "@webcomponents/webcomponentsjs": "^2.0.0",
-    "highlightjs": "^9.10.0",
-    "marked": "^0.5.0",
-    "particlesjs": "^2.2.3",
-    "polymer-cli": "^1.7.7"
+    "@polymer/polymer": "^3.3.0",
+    "@vaadin/router": "^1.4.2",
+    "@vaadin/vaadin-checkbox": "^2.2.10",
+    "@vaadin/vaadin-lumo-styles": "^1.5.0",
+    "@vaadin/vaadin-tabs": "^2.1.2",
+    "@vaadin/vaadin-text-field": "^2.4.11",
+    "@webcomponents/webcomponentsjs": "^2.2.10",
+    "highlightjs": "^9.12.0",
+    "marked": "^0.7.0",
+    "polymer-cli": "^1.9.11",
+    "lodash": "^4.17.15",
+    "deep-extend": "^0.5.1",
+    "braces": "^2.3.1"
   },
   "scripts": {
     "build": "npm install; npm link ../; npx polymer build"
diff --git a/site/polymer.json b/site/polymer.json
index e039085..c7c5926 100644
--- a/site/polymer.json
+++ b/site/polymer.json
@@ -15,8 +15,7 @@
     "_redirects",
     "node_modules/j-elements/README.md",
     "node_modules/j-elements/docs/*",
-    "node_modules/@webcomponents/webcomponentsjs/**",
-    "node_modules/particlesjs/**"
+    "node_modules/@webcomponents/webcomponentsjs/**"
   ],
   "builds": [
     {
diff --git a/site/src/about.md b/site/src/about.md
index 4e81d43..0e479fb 100644
--- a/site/src/about.md
+++ b/site/src/about.md
@@ -1,15 +1,18 @@
 # About
 
 <div class="hero">
-  <canvas class="background"></canvas>
   <j-icon></j-icon>
 </div>
 
-<p class="ingress"><b>J-elements is a web development research project</b>, looking at some of the current problems around authoring and using Web Components and how to provide solutions to those problems while the browsers improve their capabilities.</p>
+<p class="ingress"><b>JElements is a web development research project</b>, looking at some of the current problems around authoring and using Web Components and how to provide solutions to those problems while the browsers improve their capabilities.</p>
 
 <p class="ingress">It also includes a collection or ready-to-use web components which test the solutions first-hand.</p>
 
-> Since it’s research project, **j-elements is not recommended for production use**. It is mainly looking for feedback from other developers, if the concepts are viable for production. See [Maturity Levels](/maturity) for more info.
+<p>The package has zero dependencies (~11kB gzipped in total), so it is lightweight to use in your projects.</p>
+
+> Since it’s research project, **JElements is not recommended for production use**. It is mainly looking for feedback from other developers, if the concepts are viable for production. See [Maturity Levels](/maturity) for more info.
+
+> **Browser support:** Evergreen browsers (not IE11 or pre-Chromium Edge)
 
 ## [Get Started ›](/howto)
 
@@ -20,8 +23,9 @@
 The utilities are lower-level mixins and elements which help build components that are easier for other developers to use.
 
 - [`LightStyleElement`](/light-style-element) is a way to include built-in styling for a web component without the need to use shadow DOM
+- [`MutationAnimationMixin`](/mutation-animation) makes it easy to animate elements in and out of the DOM
+- [`PortalElement`](/portal-element) provides a mechanism for escaping any stacking context, making it suitable as a base for reusable overlay components
 - [`StylableMixin`](/stylable-mixin) allows developers using such components to be styled more freely, by allowing them to inject styles inside the shadow DOM
-- [`TeleportingElement`](/teleporting-element) provides a mechanism for escaping any stacking context, making it suitable as a base for reusable overlay components
 
 
 ### Components
@@ -32,5 +36,6 @@ The utilities are lower-level mixins and elements which help build components th
 - [Dialog](/dialog) – testing `TeleportingElement`, if it is a viable option for building dialogs
 - [Field](/field) – add consistently styled labels and error messages for any input element
 - [Icon](/icon) – easy to style icon component, giving CSS the power to change the icon shape
+- [Input](/input) – a text input component with consistent styling across different browsers, prefix and suffix content support and auto-sizing in both horizontal and vertical directions
 - [Placeholder](/placeholder) – a simple element for showing a placeholder box (useful for quick prototyping)
 - [Tooltip](/tooltip) – testing `TeleportingElement`, if its a viable option for building tooltips
diff --git a/site/src/j-site.js b/site/src/j-site.js
index daf6bb1..9f6abf9 100644
--- a/site/src/j-site.js
+++ b/site/src/j-site.js
@@ -7,6 +7,11 @@ import '@vaadin/vaadin-lumo-styles/typography.js';
 import './shared-styles.js';
 import './maturity-badge.js';
 
+// Needed for docs Example
+import {MutationAnimationMixin} from 'j-elements';
+class MyList extends MutationAnimationMixin(HTMLElement) {}
+window.customElements.define('my-list', MyList);
+
 // Pages
 import './index.js';
 
@@ -18,16 +23,16 @@ class JSite extends HTMLElement {
         <style include="shared-styles"></style>
       </custom-style>
 
-      <style type="scoped" for="j-app-layout">
+      <style media="j-app-layout">
         /* Uncomment this to have a colored navbar */
-        /* .navbar.navbar.navbar.navbar {
+        .navbar.navbar.navbar.navbar {
           background-color: var(--lumo-primary-color);
           color: var(--lumo-primary-contrast-color);
-        } */
+        }
       </style>
 
       <j-app-layout type="top">
-        <h1 slot="brand">j-elements</h1>
+        <h1 slot="brand">JElements</h1>
 
         <a href="https://github.com/jouni/j-elements" slot="support" title="View on GitHub" class="github-link">
           <j-icon class="github-icon"></j-icon>
@@ -38,10 +43,6 @@ class JSite extends HTMLElement {
           <vaadin-tab><a tabindex="-1" href="/">About</a></vaadin-tab>
           <vaadin-tab><a tabindex="-1" href="/howto">Get Started</a></vaadin-tab>
           <vaadin-tab><a tabindex="-1" href="/maturity">Maturity Levels</a></vaadin-tab>
-          <h6>Utilities</h6>
-          <vaadin-tab><a tabindex="-1" href="/light-style-element">Light Style Element</a></vaadin-tab>
-          <vaadin-tab><a tabindex="-1" href="/stylable-mixin">Stylable Mixin</a></vaadin-tab>
-          <vaadin-tab><a tabindex="-1" href="/teleporting-element">Teleporting Element</a></vaadin-tab>
           <h6>Components</h6>
           <vaadin-tab><a tabindex="-1" href="/app-layout">App Layout</a></vaadin-tab>
           <vaadin-tab><a tabindex="-1" href="/avatar">Avatar</a></vaadin-tab>
@@ -49,8 +50,15 @@ class JSite extends HTMLElement {
           <vaadin-tab><a tabindex="-1" href="/dialog">Dialog</a></vaadin-tab>
           <vaadin-tab><a tabindex="-1" href="/field">Field</a></vaadin-tab>
           <vaadin-tab><a tabindex="-1" href="/icon">Icon</a></vaadin-tab>
+          <vaadin-tab><a tabindex="-1" href="/input">Input</a></vaadin-tab>
           <vaadin-tab><a tabindex="-1" href="/placeholder">Placeholder</a></vaadin-tab>
           <vaadin-tab><a tabindex="-1" href="/tooltip">Tooltip</a></vaadin-tab>
+          <h6>Utilities</h6>
+          <vaadin-tab><a tabindex="-1" href="/light-style-element">Light Style Element</a></vaadin-tab>
+          <vaadin-tab><a tabindex="-1" href="/mutation-animation">Mutation Animation Mixin</a></vaadin-tab>
+          <vaadin-tab><a tabindex="-1" href="/portal-element">Portal Element</a></vaadin-tab>
+          <vaadin-tab><a tabindex="-1" href="/stylable-mixin">Stylable Mixin</a></vaadin-tab>
+          <vaadin-tab><a tabindex="-1" href="/teleporting-element">Teleporting Element</a></vaadin-tab>
         </vaadin-tabs>
 
         <div class="content"></div>
@@ -109,21 +117,9 @@ class JSite extends HTMLElement {
   }
 
   _updateTitle(pageTitle) {
-    document.title = `j-elements: ${pageTitle}`;
+    document.title = `JElements: ${pageTitle}`;
     // Update navbar text
     this.querySelector('h1[slot=brand]').innerHTML = '<span class="logo">&lt;j/&gt;</span> ' + pageTitle;
-
-    // Restart the home page animation
-    if (this._router.location.pathname == "/") {
-      setTimeout(() => {
-        Particles.init({
-          selector: '.hero .background',
-          connectParticles: true,
-          color: '#ffffff',
-          minDistance: 60
-        });
-      }, 200);
-    }
   }
 }
 
diff --git a/site/src/render-markdown.js b/site/src/render-markdown.js
index 9208835..03b477c 100644
--- a/site/src/render-markdown.js
+++ b/site/src/render-markdown.js
@@ -4,7 +4,7 @@ import 'highlightjs';
 export function renderMarkdown(pathToMarkdownFile, target) {
   fetch(pathToMarkdownFile).then(response => {
     if (response.status == 404) {
-      target.innerHTML = '<h1>404</h1><p>Sorry, this page was not found.</p>'
+      target.innerHTML = '<h1>404</h1><p>Sorry, this page was not found.</p><p><a href="/">Home</a></p>'
     } else {
       response.text().then(text => {
 
diff --git a/site/src/shared-styles.js b/site/src/shared-styles.js
index 50467b4..c577865 100644
--- a/site/src/shared-styles.js
+++ b/site/src/shared-styles.js
@@ -52,14 +52,6 @@ $_documentContainer.innerHTML = `<dom-module id="shared-styles">
         margin-bottom: var(--lumo-space-l);
       }
 
-      .hero .background {
-        position: absolute;
-        top: 0;
-        left: 0;
-        z-index: 0;
-        opacity: 0.3;
-      }
-
       .hero j-icon {
         position: relative;
         z-index: 0;
@@ -141,8 +133,6 @@ $_documentContainer.innerHTML = `<dom-module id="shared-styles">
       }
 
       .hljs {
-        background-color: var(--lumo-contrast-5pct);
-        border-radius: var(--lumo-border-radius);
         margin: var(--lumo-space-l) 0;
         padding: var(--lumo-space-s) var(--lumo-space-m);
       }
@@ -156,6 +146,7 @@ $_documentContainer.innerHTML = `<dom-module id="shared-styles">
 
       .demo-snippet__code {
         margin: 1rem 0 0;
+        background: transparent;
       }
 
       .demo-snippet__code .hljs {
@@ -165,27 +156,6 @@ $_documentContainer.innerHTML = `<dom-module id="shared-styles">
         overflow: auto;
       }
 
-      button {
-        font: inherit;
-        background-color: var(--lumo-contrast-5pct);
-        color: var(--lumo-primary-text-color);
-        font-weight: 500;
-        border: 0;
-        padding: 0.3em 1em;
-        border-radius: var(--lumo-border-radius);
-        margin: 0;
-        outline: none;
-      }
-
-      button:hover,
-      button:focus {
-        background-color: var(--lumo-primary-color-10pct);
-      }
-
-      button:active {
-        background-color: var(--lumo-primary-color-50pct);
-      }
-
       maturity-badge a {
         color: inherit;
         text-decoration: none !important;
@@ -207,12 +177,12 @@ $_documentContainer.innerHTML = `<dom-module id="shared-styles">
         color: var(--lumo-error-text-color);
       }
 
-      maturity-badge[proto] a {
+      maturity-badge[preview] a {
         background-color: rgb(255,241,214);
         color: rgb(184,121,0);
       }
 
-      maturity-badge[rfc] a {
+      maturity-badge[beta] a {
         background-color: var(--lumo-success-color-10pct);
         color: var(--lumo-success-text-color);
       }
@@ -222,6 +192,11 @@ $_documentContainer.innerHTML = `<dom-module id="shared-styles">
         color: var(--lumo-primary-text-color);
       }
 
+      maturity-badge[deprecated] a {
+        background-color: var(--lumo-error-color);
+        color: var(--lumo-error-contrast-color);
+      }
+
       code {
         font-family: "Source Code Pro", monospace;
         font-size: 0.875em;
diff --git a/src/components/JButton.js b/src/components/JButton.js
new file mode 100644
index 0000000..ac8c5b0
--- /dev/null
+++ b/src/components/JButton.js
@@ -0,0 +1,53 @@
+import NativeElementWrapper from '../util/NativeElementWrapper';
+import bemToShadow from '../util/bemToShadow';
+import style from '../styles/button.css';
+
+export class JButton extends NativeElementWrapper {
+  static get template() {
+    const template = super.template;
+    template.innerHTML += `
+      <style>
+        :host {
+          position: relative;
+        }
+
+        button {
+          opacity: 0;
+          position: absolute;
+          top: 0;
+          left: 0;
+          width: 100%;
+          height: 100%;
+        }
+
+        :host {
+          display: inline-flex;
+          cursor: default;
+        }
+        ${bemToShadow(style, '.j-button')}
+      </style>
+      <button native-element></button>
+      <slot></slot>`;
+    return template;
+  }
+
+  constructor() {
+    super();
+    this.__boundFocusInListener = this._onFocusIn.bind(this);
+  }
+
+  connectedCallback() {
+    super.connectedCallback();
+    this.addEventListener('focusin', this.__boundFocusInListener);
+  }
+
+  _onFocusIn() {
+    if (!this.hasAttribute('aria-label')) {
+      this._nativeElement.setAttribute('aria-label', this.textContent.trim());
+    }
+  }
+}
+
+window.customElements.define('j-button', JButton);
+
+export default JButton;
diff --git a/src/components/JField.js b/src/components/JField.js
new file mode 100644
index 0000000..882a021
--- /dev/null
+++ b/src/components/JField.js
@@ -0,0 +1,193 @@
+import LightStyleElement from '../util/LightStyleElement.js';
+import bemToShadow from '../util/bemToShadow.js';
+import theme from '../styles/field.css';
+
+let fieldId = 0;
+
+/**
+ * Adds label and validation features to an element.
+ *
+ * The element applies the `required` attribute to itself if any of the contained elements have that
+ * attribute.
+ *
+ * The element sets the `invalid` attribute on itself if any of the contained elements fails the
+ * checkValidity test.
+ */
+export class JField extends LightStyleElement {
+  constructor() {
+    const styles = `
+      .j-field {
+        display: flex;
+        flex-direction: column;
+      }
+
+      .j-field--required .j-field__label::after {
+        content: " *";
+      }
+      ${theme}
+    `;
+    super(styles);
+
+    this._id = `__${ this.nodeName.toLowerCase() }-${ fieldId++ }__`;
+
+    this.__boundFocusInListener = this._onFocusIn.bind(this);
+    this.__boundFocusOutListener = this._onFocusOut.bind(this);
+    this.__boundInputListener = this._onInput.bind(this);
+    this.__boundMutationListener = this.__mutations.bind(this);
+
+    this.classList.add('j-field');
+  }
+
+  connectedCallback() {
+    super.connectedCallback();
+
+    this.addEventListener('focusin', this.__boundFocusInListener);
+    this.addEventListener('focusout', this.__boundFocusOutListener);
+    this.addEventListener('change', this._checkValidity);
+    this.addEventListener('input', this.__boundInputListener);
+    this.addEventListener('click', this._onClick);
+
+    if (!this.__mutationObserver) {
+      this.__mutationObserver = new MutationObserver(this.__boundMutationListener);
+    }
+
+    this.__mutationObserver.observe(this, {childList: true});
+
+    this.__mutations();
+  }
+
+  disconnectedCallback() {
+    this.removeEventListener('focusin', this.__boundFocusInListener);
+    this.removeEventListener('focusout', this.__boundFocusOutListener);
+    this.removeEventListener('change', this._checkValidity);
+    this.removeEventListener('input', this.__boundInputListener);
+    this.removeEventListener('click', this._onClick);
+    this.__mutationObserver.disconnect();
+  }
+
+  __mutations() {
+    const labelElement = this.querySelector('[label], label');
+    if (labelElement) {
+      labelElement.setAttribute('id', this._id + 'label');
+      labelElement.classList.add('j-field__label');
+    }
+
+    const inputElements = this._queryInputElements();
+    if (inputElements.length > 0 && labelElement) {
+      // TODO should preserve existing values
+      inputElements[0].setAttribute('aria-labelledby', this._id + 'label');
+    }
+
+    // Native radio buttons need to have the same name. Add a generated one if not specified already.
+    this.removeAttribute('role');
+    Array.from(this.querySelectorAll('input[type=radio]')).forEach(radio => {
+      // Set a radiogroup role if the field contains radio buttons and let the group be labelled by the field labelElement
+      this.setAttribute('role', 'radiogroup');
+      // TODO should preserve existing values
+      this.setAttribute('aria-labelledby', this._id);
+
+      // Remove extra labelled by from the radio buttons, expect them to have their own labels defined by the developer
+      radio.removeAttribute('aria-labelledby');
+      if (!radio.hasAttribute('name')) {
+        radio.setAttribute('name', this._id);
+      }
+    });
+
+    // If input is required, add the attribute to the host
+    const isRequired = this.querySelector('[required]');
+    if (isRequired) {
+      this.classList.add('j-field--required');
+    } else {
+      this.classList.remove('j-field--required');
+    }
+  }
+
+  _checkValidity() {
+    let valid = true;
+    let validationMessage = '';
+    const inputElements = this._queryInputElements();
+
+    inputElements.forEach(input => {
+      if (input.checkValidity && !input.checkValidity()) {
+        valid = false;
+        validationMessage += input.getAttribute('error-message') || input.validationMessage;
+      }
+    });
+
+    if (!this._validationMessage) {
+      this._validationMessage = document.createElement('p');
+      this._validationMessage.classList.add('j-field__validation-message');
+      this._validationMessage.setAttribute('aria-live', 'polite');
+      this._validationMessage.id = this._id + 'description';
+    }
+
+    this._validationMessage.innerHTML = validationMessage;
+
+    if (valid) {
+      this.classList.remove('j-field--invalid');
+      if (this._validationMessage.parentNode) {
+        this.removeChild(this._validationMessage);
+        // TODO should make sure to only remove the one entry by j-field
+        inputElements[0].setAttribute('aria-describedby', '');
+      }
+    } else {
+      this.classList.add('j-field--invalid');
+      this.appendChild(this._validationMessage);
+      // TODO should make sure to preserve existing values
+      inputElements[0].setAttribute('aria-describedby', this._id + 'description');
+    }
+  }
+
+  _onClick(e) {
+    let target = e.target || e.path[0];
+
+    do {
+      // Only consider clicks on the label element
+      if (target.id == this._id + 'label') {
+        const inputElements = this._queryInputElements();
+        if (inputElements[0]) {
+          inputElements[0].focus();
+        }
+        return;
+      }
+
+      target = target.parentNode;
+    } while (target.parentNode);
+  }
+
+  _onFocusIn(e) {
+    this.setAttribute('focus', '');
+  }
+
+  _onFocusOut(e) {
+    this._checkValidity();
+    this.removeAttribute('focus');
+  }
+
+  _onInput(e) {
+    if (this.__inputDebounce) {
+      clearTimeout(this.__inputDebounce);
+    }
+    if (this.classList.contains('j-field--invalid')) {
+      this._checkValidity();
+    } else {
+      this.__inputDebounce = setTimeout(this._checkValidity.bind(this), 1000);
+    }
+  }
+
+  _queryInputElements() {
+    if (!this.__inputElements){
+      this.__inputElements = [];
+      this.__inputElements = this.__inputElements.concat(Array.from(this.querySelectorAll('input, textarea, select')));
+      // 3. Try to find an element with a tabindex (assume a custom input element will have tabindex=0 so it is focusable)
+      this.__inputElements = this.__inputElements.concat(Array.from(this.querySelectorAll('[tabindex="0"]')));
+      // 4. Find any slotted element as a fallback (not label or error-message slot)
+      this.__inputElements = this.__inputElements.concat(Array.from(this.querySelectorAll(`:not(input):not(textarea):not(select):not(label):not(.j-field__validation-message)`)));
+    }
+    return this.__inputElements;
+  }
+}
+
+window.customElements.define('j-field', JField);
+
+export default JField;
diff --git a/src/j-icon.js b/src/components/JIcon.js
similarity index 86%
rename from src/j-icon.js
rename to src/components/JIcon.js
index 22c67aa..324a146 100644
--- a/src/j-icon.js
+++ b/src/components/JIcon.js
@@ -23,16 +23,9 @@ template.innerHTML = `
 
 export class JIcon extends HTMLElement {
   connectedCallback() {
-    if (!this.__jIconTemplateStamped) {
+    if (!this.shadowRoot) {
       this.attachShadow({mode: 'open'});
-
-      if (typeof ShadyCSS != 'undefined' && !ShadyCSS.nativeShadow) {
-        ShadyCSS.prepareTemplate(template, this.nodeName.toLowerCase());
-        ShadyCSS.styleElement(this);
-      }
-
       this.shadowRoot.appendChild(template.content.cloneNode(true));
-      this.__jIconTemplateStamped = true;
     }
 
     // Need to defer so that polyfilled browsers can catch up
@@ -62,3 +55,5 @@ export class JIcon extends HTMLElement {
 }
 
 window.customElements.define('j-icon', JIcon);
+
+export default JIcon;
diff --git a/src/components/JInput.js b/src/components/JInput.js
new file mode 100644
index 0000000..cfd6d8f
--- /dev/null
+++ b/src/components/JInput.js
@@ -0,0 +1,170 @@
+import NativeInputElementWrapper from '../util/NativeInputElementWrapper';
+import bemToShadow from '../util/bemToShadow';
+import style from '../styles/input.css';
+
+export class JInput extends NativeInputElementWrapper {
+  static get template() {
+    const template = super.template;
+    template.innerHTML += `
+      <style>
+        :host {
+          display: inline-block;
+          cursor: text;
+          box-sizing: border-box;
+          resize: none;
+          overflow: hidden;
+          line-height: initial;
+        }
+
+        :host([multiline]:not([autosize])) {
+          height: 3em;
+          resize: both;
+        }
+
+        .container {
+          display: flex;
+          align-items: baseline;
+        }
+
+        .container,
+        input,
+        textarea {
+          text-align: inherit;
+          line-height: inherit;
+          width: 100%;
+          height: 100%;
+          max-height: 100%;
+          max-width: 100%;
+        }
+
+        input,
+        textarea {
+          font: inherit;
+          color: inherit;
+          background: transparent;
+          box-shadow: none;
+          margin: 0;
+          padding: 0;
+          border: 0;
+          min-width: 1em;
+          min-height: 1em;
+          outline: none;
+          resize: none;
+        }
+
+        /* Number input */
+
+        :host([type=number]) {
+          text-align: right;
+          text-align: end;
+        }
+
+        .container ::slotted([slot]) {
+          text-align: initial;
+        }
+
+        input::-webkit-inner-spin-button {
+          display: var(--j-input-spin-buttons, none);
+        }
+
+        input[type=number] {
+          -moz-appearance: var(--j-input-spin-buttons, textfield);
+        }
+        ${bemToShadow(style, '.j-input')}
+      </style>
+    `;
+    const container = template.content.querySelector('.container');
+    let slot = document.createElement('slot');
+    slot.setAttribute('name', 'start');
+    container.insertBefore(slot, container.firstElementChild);
+    slot = document.createElement('slot');
+    slot.setAttribute('name', 'end');
+    container.appendChild(slot);
+    return template;
+  }
+
+  static get observedAttributes() {
+    return super.observedAttributes.filter(attr => attr != 'value');
+  }
+
+  get value() {
+    return this._nativeElement.value;
+  }
+
+  set value(val) {
+    if (val) {
+      val = this.multiline ? val.replace(/\\n/g, '\n') : val.replace(/\n\r|\n/g, ' ');
+    }
+    this._nativeElement.value = val;
+    this._updateSize();
+  }
+
+  connectedCallback() {
+    if (!this.shadowRoot) {
+      super.connectedCallback();
+
+      // Force the internal input to change to textarea if multiline
+      this.multiline = this.hasAttribute('multiline');
+      // Update label only after internal input is the correct element (e.g. textarea) to preserve newlines
+      this.value = this.getAttribute('value');
+
+      this._nativeElement.addEventListener('input', e => {
+        this._updateSize();
+        this._propagateEvent(e);
+      });
+    }
+  }
+
+  get multiline() {
+    return this.hasAttribute('multiline');
+  }
+
+  set multiline(val) {
+    if (Boolean(val)) {
+      this.setAttribute('multiline', '');
+      if (this._nativeElement && this._nativeElement.nodeName == 'INPUT') {
+        const textarea = document.createElement('textarea');
+        this.shadowRoot.querySelector('.container').replaceChild(textarea, this._nativeElement);
+        textarea.value = this._nativeElement.value;
+        this._nativeElement = textarea;
+        this._initNativeElementAttributes();
+        textarea.setAttribute('rows', '1');
+      }
+    } else {
+      this.removeAttribute('multiline');
+      if (this._nativeElement && this._nativeElement.nodeName == 'TEXTAREA') {
+        const input = document.createElement('input');
+        this.shadowRoot.querySelector('.container').replaceChild(input, this._nativeElement);
+        input.value = this._nativeElement.value;
+        this._nativeElement = input;
+        this._initNativeElementAttributes();
+      }
+    }
+  }
+
+  get autosize() {
+    return this.hasAttribute('autosize');
+  }
+
+  set autosize(val) {
+    if (Boolean(val)) {
+      this.setAttribute('autosize', '');
+    } else {
+      this.removeAttribute('autosize');
+    }
+  }
+
+  _updateSize() {
+    const dimension = this.multiline ? 'Height' : 'Width';
+    if (this.autosize) {
+      this._nativeElement.style[dimension.toLowerCase()] = '0';
+      this._nativeElement.style[dimension.toLowerCase()] = this._nativeElement['scroll' + dimension] + 'px';
+    } else {
+      this._nativeElement.style[dimension.toLowerCase()] = '';
+    }
+  }
+}
+
+window.customElements.define('j-input', JInput);
+
+export default JInput;
diff --git a/src/j-app-layout.js b/src/components/j-app-layout.js
similarity index 97%
rename from src/j-app-layout.js
rename to src/components/j-app-layout.js
index cff480d..cfd3ce7 100644
--- a/src/j-app-layout.js
+++ b/src/components/j-app-layout.js
@@ -1,5 +1,5 @@
-import {StylableMixin} from './stylable-mixin.js';
-import './j-icon.js';
+import StylableMixin from '../util/StylableMixin.js';
+import JIcon from './JIcon.js';
 
 const template = document.createElement('template');
 template.innerHTML = `
@@ -31,10 +31,11 @@ template.innerHTML = `
     }
 
     /* Just for fancy :) */
-    @supports (-webkit-backdrop-filter: blur(1px)) {
+    @supports (backdrop-filter: blur(1px)), (-webkit-backdrop-filter: blur(1px)) {
       .navbar,
       .drawer {
         -webkit-backdrop-filter: blur(30px);
+        backdrop-filter: blur(30px);
         background-color: rgba(240,240,240,0.7);
       }
     }
@@ -264,9 +265,10 @@ template.innerHTML = `
         transition: transform 170ms cubic-bezier(0.38, 0.85, 0.81, 1.11);
       }
 
-      @supports (-webkit-backdrop-filter: blur(1px)) {
+      @supports (backdrop-filter: blur(1px)), (-webkit-backdrop-filter: blur(1px)) {
         .app-layout-drawer {
           -webkit-backdrop-filter: blur(30px);
+          backdrop-filter: blur(30px);
           background-color: rgba(240,240,240,0.7);
         }
       }
@@ -283,6 +285,7 @@ template.innerHTML = `
         width: 100%;
         height: auto;
         -webkit-backdrop-filter: none;
+        backdrop-filter: none;
       }
 
       :host([type]) .navbar {
diff --git a/src/j-avatar.js b/src/components/j-avatar.js
similarity index 94%
rename from src/j-avatar.js
rename to src/components/j-avatar.js
index ce8af3b..f6f6636 100644
--- a/src/j-avatar.js
+++ b/src/components/j-avatar.js
@@ -1,7 +1,7 @@
-import {StylableMixin} from './stylable-mixin.js';
-import bemToShadow from './bem-to-shadow.js';
-import style from './styles/avatar-style.js';
-import './j-icon.js';
+import StylableMixin from '../util/StylableMixin.js';
+import bemToShadow from '../util/bemToShadow.js';
+import style from '../styles/avatar-style.js';
+import './JIcon.js';
 import './j-tooltip.js';
 
 const template = document.createElement('template');
diff --git a/src/j-card.js b/src/components/j-card.js
similarity index 97%
rename from src/j-card.js
rename to src/components/j-card.js
index 81b85f0..a426e68 100644
--- a/src/j-card.js
+++ b/src/components/j-card.js
@@ -1,6 +1,6 @@
-import {StylableMixin} from './stylable-mixin.js';
-import bemToShadow from './bem-to-shadow.js';
-import style from './styles/card-style.js';
+import StylableMixin from '../util/StylableMixin.js';
+import bemToShadow from '../util/bemToShadow.js';
+import style from '../styles/card-style.js';
 
 const template = document.createElement('template');
 template.innerHTML = `
diff --git a/src/components/j-dialog.js b/src/components/j-dialog.js
new file mode 100644
index 0000000..acecbb9
--- /dev/null
+++ b/src/components/j-dialog.js
@@ -0,0 +1,60 @@
+import StylableMixin from '../util/StylableMixin.js';
+import bemToShadow from '../util/bemToShadow.js';
+import PortalElement from '../util/PortalElement.js';
+import style from '../styles/dialog-style.js';
+
+const template = document.createElement('template');
+template.innerHTML = `
+  <style>
+    :host {
+      position: fixed;
+      z-index: var(--j-dialog-z-index, 100);
+      top: 50%;
+      left: 50%;
+      transform: translate(-50%, -50%);
+    }
+
+    :host([disabled]) {
+      visibility: hidden;
+      height: 0;
+      overflow: hidden;
+    }
+  </style>
+  ${ bemToShadow(style, '.j-dialog') }
+  <slot></slot>
+`;
+
+export class JDialog extends StylableMixin(PortalElement) {
+  connectedCallback() {
+    if (!this.__jdialogTemplateStamped) {
+      this.attachShadow({mode: 'open'});
+      this.shadowRoot.appendChild(template.content.cloneNode(true));
+      this.__jdialogTemplateStamped = true;
+      this.disabled = true;
+    }
+
+    super.connectedCallback();
+  }
+
+  show() {
+    if (!this.disabled) {
+      return;
+    }
+    this.disabled = false;
+  }
+
+  hide() {
+    this.disabled = true;
+  }
+
+  _disconnectedListener() {
+    this._hide();
+  }
+
+  destroy() {
+    this.hide();
+    this.parentNode.removeChild(this);
+  }
+}
+
+window.customElements.define('j-dialog', JDialog);
diff --git a/src/j-placeholder.js b/src/components/j-placeholder.js
similarity index 100%
rename from src/j-placeholder.js
rename to src/components/j-placeholder.js
diff --git a/src/j-tooltip.js b/src/components/j-tooltip.js
similarity index 70%
rename from src/j-tooltip.js
rename to src/components/j-tooltip.js
index 779be60..1e7d974 100644
--- a/src/j-tooltip.js
+++ b/src/components/j-tooltip.js
@@ -1,7 +1,6 @@
-import {StylableMixin} from './stylable-mixin.js';
-import bemToShadow from './bem-to-shadow.js';
-import TeleportingElement from './teleporting-element.js';
-import style from './styles/tooltip-style.js';
+import bemToShadow from '../util/bemToShadow.js';
+import PortalElement from '../util/PortalElement.js';
+import style from '../styles/tooltip-style.js';
 
 const template = document.createElement('template');
 template.innerHTML = `
@@ -14,12 +13,18 @@ template.innerHTML = `
       /* Shift so the cursor doesn't block it */
       margin-left: 10px;
     }
+
+    :host([disabled]) {
+      visibility: hidden;
+      height: 0;
+      overflow: hidden;
+    }
   </style>
   ${ bemToShadow(style, '.j-tooltip') }
   <slot></slot>
 `;
 
-export class JTooltip extends StylableMixin(TeleportingElement) {
+export class JTooltip extends PortalElement {
   constructor() {
     super();
 
@@ -28,19 +33,16 @@ export class JTooltip extends StylableMixin(TeleportingElement) {
   }
 
   connectedCallback() {
-    super.connectedCallback();
-
     if (!this.__jtooltipTemplateStamped) {
-      if (typeof ShadyCSS != 'undefined' && !ShadyCSS.nativeShadow) {
-        ShadyCSS.prepareTemplate(template, this.nodeName.toLowerCase());
-        ShadyCSS.styleElement(this);
-      }
-
+      this.attachShadow({mode: 'open'});
       this.shadowRoot.appendChild(template.content.cloneNode(true));
       this.__jtooltipTemplateStamped = true;
+      this.disabled = true;
     }
 
-    if (!this.visible) {
+    super.connectedCallback();
+
+    if (this.disabled) {
       this._parentNode = this.parentNode;
       this._parentNode.addEventListener('mousemove', this._showListener);
       this._parentNode.addEventListener('mouseout', this._hideListener);
@@ -48,16 +50,15 @@ export class JTooltip extends StylableMixin(TeleportingElement) {
   }
 
   disconnectedCallback() {
-    if (!this.visible && this._parentNode) {
+    if (this.disabled && this._parentNode) {
       this._parentNode.removeEventListener('mousemove', this._showListener);
       this._parentNode.removeEventListener('mouseout', this._hideListener);
       delete this._parentNode;
     }
-    if (super.disconnectedCallback) super.disconnectedCallback();
   }
 
   _show(e) {
-    if (this.visible) {
+    if (!this.disabled) {
       return;
     }
     if (this._openTimeout) {
@@ -66,7 +67,7 @@ export class JTooltip extends StylableMixin(TeleportingElement) {
     this._openTimeout = setTimeout(() => {
       this.style.top = e.clientY + 'px';
       this.style.left = e.clientX + 'px';
-      this.visible = true;
+      this.disabled = false;
     }, 800);
   }
 
@@ -74,7 +75,7 @@ export class JTooltip extends StylableMixin(TeleportingElement) {
     if (this._openTimeout) {
       clearTimeout(this._openTimeout);
     }
-    this.visible = false;
+    this.disabled = true;
   }
 
   _disconnectedListener() {
diff --git a/src/j-button.js b/src/j-button.js
deleted file mode 100644
index d323b52..0000000
--- a/src/j-button.js
+++ /dev/null
@@ -1,15 +0,0 @@
-/* TODO How to style the normal/secondary style button without affecting all the other button styles? */
-
-import LightStyleElement from './light-style-element.js';
-import style from './styles/button-style.js';
-
-export class JButton extends LightStyleElement {
-  constructor() {
-    super(style);
-    this.setAttribute('role', 'button');
-    this.setAttribute('tabindex', '0');
-    this.classList.add('j-button');
-  }
-}
-
-window.customElements.define('j-button', JButton);
diff --git a/src/j-dialog.js b/src/j-dialog.js
deleted file mode 100644
index cbe15c0..0000000
--- a/src/j-dialog.js
+++ /dev/null
@@ -1,39 +0,0 @@
-import {StylableMixin} from './stylable-mixin.js';
-import bemToShadow from './bem-to-shadow.js';
-import TeleportingElement from './teleporting-element.js';
-import style from './styles/dialog-style.js';
-
-const template = document.createElement('template');
-template.innerHTML = `
-  <style>
-    :host {
-      position: fixed;
-      z-index: var(--j-dialog-z-index, 100);
-      top: 50%;
-      left: 50%;
-      transform: translate(-50%, -50%);
-    }
-  </style>
-  ${ bemToShadow(style, '.j-dialog') }
-  <slot></slot>
-`;
-
-export class JDialog extends StylableMixin(TeleportingElement) {
-  connectedCallback() {
-    if (this._isPlaceholder) return;
-
-    super.connectedCallback();
-
-    if (!this.__jdialogTemplateStamped) {
-      if (typeof ShadyCSS != 'undefined' && !ShadyCSS.nativeShadow) {
-        ShadyCSS.prepareTemplate(template, this.nodeName.toLowerCase());
-        ShadyCSS.styleElement(this);
-      }
-
-      this.shadowRoot.appendChild(template.content.cloneNode(true));
-      this.__jdialogTemplateStamped = true;
-    }
-  }
-}
-
-window.customElements.define('j-dialog', JDialog);
diff --git a/src/j-field.js b/src/j-field.js
deleted file mode 100644
index f213917..0000000
--- a/src/j-field.js
+++ /dev/null
@@ -1,143 +0,0 @@
-import LightStyleElement from './light-style-element.js';
-import bemToShadow from './bem-to-shadow.js';
-import style from './styles/field-style.js';
-
-let fieldId = 0;
-
-/**
- * Adds label, invalid and error message features to an element.
- *
- * The element applies the `required` attribute to itself if any of the contained elements have that
- * attribute.
- *
- * The element sets the `invalid` attribute on itself if any of the contained elements fails the
- * checkValidity test and send an `invalid` event.
- */
-class JField extends LightStyleElement {
-  constructor() {
-    super(style);
-
-    this._id = `__${ this.nodeName.toLowerCase() }-${ fieldId++ }__`;
-
-    this.__boundFocusInListener = this._onFocusIn.bind(this);
-    this.__boundFocusOutListener = this._onFocusOut.bind(this);
-    this.__mutationObserver = new MutationObserver(this.__mutations.bind(this));
-
-    this.classList.add('j-field');
-  }
-
-  connectedCallback() {
-    super.connectedCallback();
-
-    this.addEventListener('focusin', this.__boundFocusInListener);
-    this.addEventListener('focusout', this.__boundFocusOutListener);
-    this.addEventListener('change', this.checkValidity);
-    this.addEventListener('click', this._onClick);
-    this.__mutationObserver.observe(this, {childList: true});
-
-    this.__mutations();
-  }
-
-  disconnectedCallback() {
-    this.removeEventListener('focusin', this.__boundFocusInListener);
-    this.removeEventListener('focusout', this.__boundFocusOutListener);
-    this.removeEventListener('change', this.checkValidity);
-    this.removeEventListener('click', this._onClick);
-    this.__mutationObserver.disconnect();
-  }
-
-  __mutations() {
-    const labelElement = this.querySelector('[label], label');
-    if (labelElement) {
-      labelElement.setAttribute('id', this._id + 'label');
-    }
-
-    const inputElements = this._queryInputElements();
-    if (inputElements.length > 0 && labelElement) {
-      inputElements[0].setAttribute('aria-labelledby', this._id + 'label');
-    }
-
-    const errorMessage = this.querySelector('[error-message]');
-    if (errorMessage) {
-      errorMessage.classList.add('j-field__error-message');
-    }
-
-
-    // Native radio buttons need to have the same name. Add a generated one if not specified already.
-    this.removeAttribute('role');
-    Array.from(this.querySelectorAll('input[type=radio]')).forEach(radio => {
-      // Set a radiogroup role if the field contains radio buttons and let the group be labelled by the field labelElement
-      this.setAttribute('role', 'radiogroup');
-      this.setAttribute('aria-labelledby', this._id);
-
-      // Remove extra labelled by from the radio buttons, expect them to have their own labels defined by the developer
-      radio.removeAttribute('aria-labelledby');
-      if (!radio.hasAttribute('name')) {
-        radio.setAttribute('name', this._id);
-      }
-    });
-
-    // If input is required, add the attribute to the host
-    const isRequired = this.querySelector('[required]');
-    if (isRequired) {
-      this.classList.add('j-field--required');
-    } else {
-      this.classList.remove('j-field--required');
-    }
-  }
-
-  checkValidity() {
-    let valid = true;
-    this._queryInputElements().forEach(input => {
-      if (input.checkValidity && !input.checkValidity()) {
-        valid = false;
-      }
-    });
-
-    if (valid) {
-      this.classList.remove('j-field--invalid');
-    } else {
-      this.classList.add('j-field--invalid');
-    }
-  }
-
-  _onClick(e) {
-    let target = e.target || e.path[0];
-
-    do {
-      // Only consider clicks on the label element
-      if (target.id == this._id + 'label') {
-        const inputElements = this._queryInputElements();
-        if (inputElements[0]) {
-          inputElements[0].focus();
-        }
-        return;
-      }
-
-      target = target.parentNode;
-    } while (target.parentNode);
-  }
-
-  _onFocusIn(e) {
-    this.setAttribute('focused', '');
-  }
-
-  _onFocusOut(e) {
-    this.checkValidity();
-    this.removeAttribute('focused');
-  }
-
-  _queryInputElements() {
-    let inputElements = [];
-    inputElements = inputElements.concat(Array.from(this.querySelectorAll('input, textarea')));
-    // 3. Try to find an element with a tabindex (assume a custom input element will have tabindex=0 so it is focusable)
-    inputElements = inputElements.concat(Array.from(this.querySelectorAll('[tabindex="0"]')));
-    // 4. Find any slotted element as a fallback (not label or error-message slot)
-    inputElements = inputElements.concat(Array.from(this.querySelector(':not(label):not([error-message])')));
-    return inputElements;
-  }
-}
-
-customElements.define('j-field', JField);
-
-export { JField };
diff --git a/src/styles/button-style.js b/src/styles/button-style.js
deleted file mode 100644
index c8f9b3c..0000000
--- a/src/styles/button-style.js
+++ /dev/null
@@ -1,14 +0,0 @@
-// By using "var innerHTML" we allow IDEs (at least Atom) to use correct syntax highlighting and code completion
-let innerHTML = `
-  <style>
-    .j-button {
-      display: inline-flex;
-      align-items: center;
-      justify-content: center;
-      border: 2px solid;
-      padding: 0.8em 0.4em;
-    }
-  </style>
-`;
-
-export default innerHTML;
diff --git a/src/styles/button.css.js b/src/styles/button.css.js
new file mode 100644
index 0000000..bfa8cde
--- /dev/null
+++ b/src/styles/button.css.js
@@ -0,0 +1,22 @@
+export default `
+  .j-button {
+    background-color: hsl(216, 100%, 97%);
+    color: hsl(216, 100%, 39%);
+    font-weight: 500;
+    padding: 0.5em 1em;
+    border-radius: 0.25em;
+  }
+
+  .j-button:hover {
+    background-color: hsl(216, 46%, 90%);
+  }
+
+  .j-button:active {
+    background-color: hsl(216, 53%, 83%);
+  }
+
+  .j-button[focus-visible],
+  .j-button:focus:not([focus-visible]) {
+    box-shadow: 0 0 0 2px lightblue;
+  }
+`;
diff --git a/src/styles/field-style.js b/src/styles/field-style.js
deleted file mode 100644
index 45f5209..0000000
--- a/src/styles/field-style.js
+++ /dev/null
@@ -1,32 +0,0 @@
-// By using "var innerHTML" we allow IDEs (at least Atom) to use correct syntax highlighting and code completion
-let innerHTML = `
-  <style>
-    .j-field {
-      display: inline-flex;
-      flex-direction: column;
-    }
-
-    .j-field__label {
-      font-size: 0.875em;
-      font-weight: 600;
-    }
-
-
-    .j-field--required .j-field__label::after {
-      content: " *";
-      color: red;
-    }
-
-    .j-field__error-message {
-      font-size: 0.875em;
-      color: red;
-      margin: 0;
-    }
-
-    .j-field:not(.j-field--invalid) .j-field__error-message {
-      display: none !important;
-    }
-  </style>
-`;
-
-export default innerHTML;
diff --git a/src/styles/field.css.js b/src/styles/field.css.js
new file mode 100644
index 0000000..0599a0d
--- /dev/null
+++ b/src/styles/field.css.js
@@ -0,0 +1,31 @@
+export default `
+  .j-field:not(:first-child) {
+    margin-top: 1.5em;
+  }
+
+  .j-field:not(:last-child) {
+    margin-bottom: 0.5em;
+  }
+
+  .j-field__label {
+    font-size: 0.875em;
+    font-weight: 600;
+  }
+
+  .j-field--required .j-field__label::after {
+    color: red;
+  }
+
+  .j-field__validation-message {
+    font-size: 0.875em;
+    margin: 0;
+    color: red;
+  }
+
+  .j-field > label,
+  .j-field > [label] {
+    font-weight: 500;
+    font-size: 0.875em;
+    margin-bottom: 0.3em;
+  }
+`;
diff --git a/src/styles/input.css.js b/src/styles/input.css.js
new file mode 100644
index 0000000..1e503ba
--- /dev/null
+++ b/src/styles/input.css.js
@@ -0,0 +1,27 @@
+export default `
+.j-input:not([type="range"]) {
+  background-color: #fff;
+  border: 1px solid #ccc;
+  border-radius: 0.25em;
+  padding: 0.3em;
+}
+
+.j-input[focus],
+.j-input:focus:not([focus]) {
+  box-shadow: 0 0 0 2px lightblue;
+  border-color: blue;
+}
+
+.j-input[disabled] {
+  opacity: 0.3;
+}
+
+.j-input[readonly] {
+  border-style: dashed;
+}
+
+.j-input > [slot] {
+  opacity: 0.6;
+  margin: 0 0.3em;
+}
+`;
diff --git a/src/light-style-element.js b/src/util/LightStyleElement.js
similarity index 63%
rename from src/light-style-element.js
rename to src/util/LightStyleElement.js
index f6d19c3..f28c9f9 100644
--- a/src/light-style-element.js
+++ b/src/util/LightStyleElement.js
@@ -1,5 +1,3 @@
-let count = 0;
-
 export default class LightStyleElement extends HTMLElement {
   constructor(style) {
     super();
@@ -7,10 +5,7 @@ export default class LightStyleElement extends HTMLElement {
     if (style && typeof style == 'string') {
       // TODO Improve detection
       if (style.indexOf('{') === -1) {
-        // Generate a classname
-        const className = `__lse__${count++}`;
-        this.classList.add(className);
-        style = `.${className} { ${style} }`;
+        style = `${this.nodeName.toLowerCase()} { ${style} }`;
       }
 
       if (style.indexOf('<style>') === -1) {
@@ -23,12 +18,14 @@ export default class LightStyleElement extends HTMLElement {
 
   connectedCallback() {
     if (this._style) {
-      if (!this.getRootNode().__lse_styles) {
-        this.getRootNode().__lse_styles = {};
+      const root = this.getRootNode();
+
+      if (!root.__lse_styles) {
+        root.__lse_styles = {};
       }
 
-      if (!this.getRootNode().__lse_styles[this.nodeName]) {
-        this.getRootNode().__lse_styles[this.nodeName] = true;
+      if (!root.__lse_styles[this.nodeName]) {
+        root.__lse_styles[this.nodeName] = true;
 
         let styleSheet;
         if (typeof this._style == 'string') {
@@ -40,13 +37,15 @@ export default class LightStyleElement extends HTMLElement {
         }
 
         if (styleSheet) {
-          if (this.getRootNode() == document) {
+          if (root == document) {
             document.body.appendChild(styleSheet);
           } else {
-            this.getRootNode().appendChild(styleSheet);
+            root.appendChild(styleSheet);
           }
         }
       }
     }
   }
+
+  // TODO should remove the <style> element when the last instance is disconnected
 }
diff --git a/src/util/MutationAnimationMixin.js b/src/util/MutationAnimationMixin.js
new file mode 100644
index 0000000..c9c0b7c
--- /dev/null
+++ b/src/util/MutationAnimationMixin.js
@@ -0,0 +1,62 @@
+const MutationAnimationMixin = superClass => class JMutationAnimationMixin extends superClass {
+  _initAnimationMutationObserver() {
+    this._insertClassName = this._insertClassName || 'j-ma-insert';
+    this._removeClassName = this._removeClassName || 'j-ma-remove';
+    this._insertAnimationName = this._insertAnimationName || 'j-ma-animation';
+    this._removeAnimationName = this._removeAnimationName || 'j-ma-animation';
+
+    // TODO this only handles first added/removed element in the mutation
+    this._mutationAnimationObserver = new MutationObserver(e => {
+      e.forEach(mutation => {
+        if (mutation.addedNodes.length > 0) {
+          if (mutation.addedNodes[0].nodeType != 1 || mutation.addedNodes[0].classList.contains(this._removeClassName)) {
+            return;
+          }
+          const inserted = mutation.addedNodes[0];
+          inserted.style.width = inserted.offsetWidth + 'px';
+          inserted.style.height = inserted.offsetHeight + 'px';
+          inserted.classList.add(this._insertClassName);
+          const insertListener = (e) => {
+            if (e.animationName == this._insertAnimationName) {
+              inserted.style.width = '';
+              inserted.style.height = '';
+              inserted.classList.remove(this._insertClassName);
+              inserted.removeEventListener('animationend', insertListener);
+            }
+          }
+          inserted.addEventListener('animationend', insertListener);
+        }
+
+        if (mutation.removedNodes.length > 0) {
+          if (mutation.removedNodes[0].nodeType != 1 || mutation.removedNodes[0].classList.contains(this._removeClassName)) {
+            return;
+          }
+          const clone = mutation.removedNodes[0].cloneNode(true);
+          clone.classList.add(this._removeClassName);
+          clone.classList.remove(this._insertClassName);
+          mutation.target.insertBefore(clone, mutation.nextSibling);
+          clone.style.width = clone.offsetWidth + 'px';
+          clone.style.height = clone.offsetHeight + 'px';
+          clone.addEventListener('animationend', e => {
+            if (e.animationName == this._removeAnimationName) {
+              e.target.parentNode.removeChild(clone);
+            }
+          });
+        }
+      });
+    });
+  }
+
+  connectedCallback() {
+    if (super.connectedCallback) super.connectedCallback();
+    if (!this._mutationAnimationObserver) this._initAnimationMutationObserver();
+    this._mutationAnimationObserver.observe(this, {childList: true});
+  }
+
+  disconnectedCallback() {
+    if (super.disconnectedCallback) super.disconnectedCallback();
+    this._mutationAnimationObserver.disconnect();
+  }
+}
+
+export default MutationAnimationMixin;
diff --git a/src/util/NativeElementWrapper.js b/src/util/NativeElementWrapper.js
new file mode 100644
index 0000000..bcd1739
--- /dev/null
+++ b/src/util/NativeElementWrapper.js
@@ -0,0 +1,170 @@
+export default class NativeElementWrapper extends HTMLElement {
+  static register(elementName) {
+    window.customElements.define(elementName, this);
+  }
+
+  static get observedAttributes() {
+    return [
+      'aria-label',
+      'aria-labelledby',
+      'aria-describedby',
+      'disabled'
+    ];
+  }
+
+  static get observedProperties() {
+    return this.observedAttributes.concat([
+      'focus',
+      'blur'
+    ]);
+  }
+
+  static toCamelCase(str) {
+    return str.replace(/-(.)/g, function(match, group1) {
+      return group1.toUpperCase();
+    });
+  }
+
+  static get template() {
+    const template = document.createElement('template');
+    template.innerHTML = '<style>[hidden] {display:none !important;}</style>';
+    return template;
+  }
+
+  connectedCallback() {
+    if (!this.shadowRoot) {
+      if (!this.constructor.template) {
+        console.error('No template defined');
+        return;
+      }
+
+      this.attachShadow({mode: 'open'});
+      this.shadowRoot.appendChild(this.constructor.template.content.cloneNode(true));
+
+      this._nativeElement = this.shadowRoot.querySelector('[native-element]');
+      if (!this._nativeElement) {
+        console.error('Native element not found in the template');
+        return;
+      }
+
+      this._initNativeElementAttributes();
+      this._observeProperties();
+
+      this.addEventListener('click', e => {
+        if (e.composedPath()[0] != this._nativeElement) {
+          this._nativeElement.focus();
+        }
+      });
+
+      this.addEventListener('focusin', e => {
+        this.setAttribute('focus', '');
+        if (this.__tabPressed) {
+          this.setAttribute('focus-visible', '');
+        }
+        this._propagateEvent(e);
+      });
+
+      this.addEventListener('focusout', e => {
+        this.removeAttribute('focus');
+        this.removeAttribute('focus-visible');
+        this._propagateEvent(e);
+      });
+
+      this._boundKeydownListener = this._bodyKeydownListener.bind(this);
+      this._boundKeyupListener = this._bodyKeyupListener.bind(this);
+    }
+
+    // super.connectedCallback();
+
+    document.body.addEventListener('keydown', this._boundKeydownListener, true);
+    document.body.addEventListener('keyup', this._boundKeyupListener, true);
+  }
+
+  disconnectedCallback() {
+    document.body.removeEventListener('keydown', this._boundKeydownListener, true);
+    document.body.removeEventListener('keyup', this._boundKeyupListener, true);
+  }
+
+  _observeProperties() {
+    this.constructor.observedProperties.forEach(attrOrProp => {
+      const prop = NativeElementWrapper.toCamelCase(attrOrProp);
+
+      if (typeof this._nativeElement[prop] == 'function') {
+        this[prop] = function() {
+          return this._nativeElement[prop](arguments);
+        }
+      } else {
+        Object.defineProperty(this, prop, {
+          get() {
+            return this._nativeElement[prop];
+          },
+          set(val) {
+            if (this.constructor.observedAttributes.indexOf(attrOrProp) > -1) {
+              if (val !== null && val !== undefined && val !== false) {
+                this.setAttribute(attrOrProp, val === true ? '' : val);
+              } else {
+                this.removeAttribute(attrOrProp);
+              }
+            }
+            this._nativeElement[prop] = val;
+          }
+        });
+      }
+    });
+  }
+
+  attributeChangedCallback(name, oldValue, newValue) {
+    if (this._nativeElement && this.constructor.observedAttributes.indexOf(name) > -1 && oldValue != newValue) {
+      if (newValue !== null) {
+        this._nativeElement.setAttribute(name, newValue);
+      } else {
+        this._nativeElement.removeAttribute(name);
+      }
+
+      if (name == 'aria-labelledby' || name == 'aria-describedby' && oldValue != newValue) {
+        // Remove existing label elements
+        Array.from(this.shadowRoot.querySelectorAll('.' + name)).forEach(label => {
+          this._nativeElement.parentNode.removeChild(label);
+        });
+
+        if (newValue !== null) {
+          newValue.split(' ').forEach(labelId => {
+            if (!this.shadowRoot.getElementById(labelId)) {
+              let label = this.getRootNode().getElementById(labelId);
+              if (label) {
+                label = label.cloneNode(true);
+                label.classList.add(name);
+                label.setAttribute('hidden', '');
+                this._nativeElement.parentNode.insertBefore(label, this._nativeElement);
+              }
+            }
+          });
+        }
+      }
+    }
+  }
+
+  _initNativeElementAttributes() {
+    this.constructor.observedAttributes.forEach(attr => {
+      this.attributeChangedCallback(attr, null, this.getAttribute(attr));
+    });
+  }
+
+  _bodyKeydownListener(e) {
+    this.__tabPressed = e.keyCode === 9;
+  }
+
+  _bodyKeyupListener() {
+    this.__tabPressed = false;
+  }
+
+  _propagateEvent(e) {
+    if (e.isTrusted) {
+      e.stopPropagation();
+      this.dispatchEvent(new CustomEvent(e.type, {
+        bubbles: true,
+        composed: true
+      }));
+    }
+  }
+}
diff --git a/src/util/NativeInputElementWrapper.js b/src/util/NativeInputElementWrapper.js
new file mode 100644
index 0000000..6148184
--- /dev/null
+++ b/src/util/NativeInputElementWrapper.js
@@ -0,0 +1,51 @@
+import NativeElementWrapper from './NativeElementWrapper.js';
+
+export default class NativeInputElementWrapper extends NativeElementWrapper {
+  static get observedAttributes() {
+    return super.observedAttributes.concat([
+      'autocomplete',
+      'autocorrect',
+      'autocapitalize',
+      'max',
+      'maxlength',
+      'min',
+      'minlength',
+      'name',
+      'pattern',
+      'placeholder',
+      'readonly',
+      'required',
+      'step',
+      'type',
+      'value'
+    ]);
+  }
+
+  static get observedProperties() {
+    return super.observedProperties.concat([
+      'checkValidity',
+      'validity',
+      'validationMessage',
+      'willValidate'
+    ]);
+  }
+
+  static get template() {
+    const template = super.template;
+    template.innerHTML += `
+      <div class="container">
+        <input type="text" native-element>
+      </div>`;
+    return template;
+  }
+
+  connectedCallback() {
+    if (!this.shadowRoot) {
+      super.connectedCallback();
+
+      this._nativeElement.addEventListener('change', e => {
+        this._propagateEvent(e);
+      });
+    }
+  }
+}
diff --git a/src/util/PortalElement.js b/src/util/PortalElement.js
new file mode 100644
index 0000000..bd5836b
--- /dev/null
+++ b/src/util/PortalElement.js
@@ -0,0 +1,189 @@
+/**
+ * # PortalElement
+ *
+ * A portal element, when enabled, moves itself and its child elements under the `<body>` element.
+ *
+ * Figuratively speaking, it “opens a portal” from one DOM location to another place in the DOM.
+ *
+ * ## Limitations:
+ *
+ * ### Additional connected/disconnected callbacks
+ *
+ * The portal element and its child elements will get detached/attached every time the portal is
+ * enabled or disabled.
+ *
+ * ### CSS selector limitations
+ *
+ * CSS selectors that match the portal or its child elements from higher in the DOM hierarchy don’t work.
+ *
+ * For example:
+ * ```
+ * <style>
+ *   .parent portal-element {
+ *     border: 1px solid;
+ *   }
+ *
+ *   .parent .child {
+ *     color: red;
+ *   }
+ * </style>
+ * <div class="parent">
+ *   <portal-element>
+ *     There should be a border around this element, but there isn’t (unless the portal is disabled).
+ *     <div class="child">I should be red, but I’m not (unless the portal is disabled).</div>
+ *   </portal-element>
+ * </div>
+ *
+ * To mitigate this, avoid selectors that match across the portal boundary.
+ * ```
+ *
+ * @extends HTMLElement
+ */
+export default class PortalElement extends HTMLElement {
+  static get observedAttributes() {
+    return ['disabled'];
+  }
+
+  connectedCallback() {
+    if (!this.disabled) {
+      this._enable();
+    }
+  }
+
+  attributeChangedCallback(name, oldValue, newValue) {
+    if (this.isTarget) return;
+    if (oldValue == newValue) return;
+    const hasValue = newValue !== null;
+
+    switch (name) {
+      case 'disabled':
+        if (hasValue) {
+          this._disable();
+        } else {
+          this._enable();
+        }
+        break;
+    }
+  }
+
+  set disabled(value) {
+    if (this.target) return;
+
+    if (Boolean(value) && !this.hasAttribute('disabled')) {
+      this.setAttribute('disabled', '');
+    } else if (!Boolean(value) && this.hasAttribute('disabled')) {
+      this.removeAttribute('disabled');
+    }
+  }
+
+  get disabled() {
+    return this.hasAttribute('disabled');
+  }
+
+  _ensureHasTarget() {
+    if (!this.isTarget && !this._target) {
+      this._target = document.createElement(this.localName);
+      this._target.setAttribute('target', '');
+      this._target.isTarget = true;
+      this._target.style.display = 'none';
+      // this.setAttribute('source', '');
+      this._target._source = this;
+    }
+  }
+
+  _isScoped() {
+    const scoped = this.getRootNode() != document;
+    if (scoped && !this.__scopeContainer) {
+      this.__scopeContainer = document.createElement(this.localName + '-scope');
+      this.__scopeContainer.attachShadow({mode: 'open'});
+    }
+    return scoped;
+  }
+
+  _enable() {
+    if (this.parentNode == document.body) {
+      return;
+    }
+
+    if (this.isTarget || this.__enabled) return;
+    this.__enabled = true;
+
+    this._ensureHasTarget();
+
+    if (this._isScoped()) {
+      let scopeCssText = Array.from(this.getRootNode().querySelectorAll('style'))
+        .reduce((result, style) => result + style.textContent, '');
+
+      // TODO: the `all` property doesn't work in Edge. Would need to list all relevant properties explicitly.
+      scopeCssText += `
+        :host {
+          all: initial !important;
+        }
+      `;
+
+      const style = document.createElement('style');
+      style.textContent = scopeCssText;
+      this.__scopeContainer.shadowRoot.appendChild(style);
+
+      // TODO: this only works one shadow level upwards. If some of the assigned nodes is a <slot> element, the assigned nodes of that would not be picked up
+      Array.from(this.querySelectorAll('slot')).forEach(slot => {
+        slot.assignedNodes().forEach(node => {
+          if (node.localName != this.localName + '-placeholder') {
+            node.__placeholder = document.createElement(this.localName + '-placeholder');
+            node.parentNode.insertBefore(node.__placeholder, node);
+            this.__scopeContainer.appendChild(node);
+          }
+        });
+      });
+    }
+
+    // Array.from(this.childNodes).forEach(child => {
+    //   this._target.appendChild(child);
+    // });
+
+    this.parentNode.insertBefore(this._target, this);
+    // TODO: could make it configurable where the portal is moved (instead of always under body)
+    if (this._isScoped()) {
+      this.__scopeContainer.shadowRoot.appendChild(this);
+      document.body.appendChild(this.__scopeContainer);
+    } else {
+      document.body.appendChild(this);
+    }
+
+    // this.style.display = 'none';
+  }
+
+  _disable() {
+    if (!this._target) {
+      return;
+    }
+
+    if (this.isTarget || !this.__enabled) return;
+    this.__enabled = false;
+
+    if (this._isScoped()) {
+      Array.from(this.__scopeContainer.childNodes).forEach(node => {
+        if (node != this) {
+          if (node.__placeholder) {
+            node.__placeholder.parentNode.insertBefore(node, node.__placeholder);
+            node.__placeholder.parentNode.removeChild(node.__placeholder);
+            delete node.__placeholder;
+          }
+        }
+      });
+      document.body.removeChild(this.__scopeContainer);
+      this.__scopeContainer.innerHTML = '';
+      this.__scopeContainer.shadowRoot.innerHTML = '';
+    } else {
+      // document.body.removeChild(this._target);
+    }
+    this._target.parentNode.insertBefore(this, this._target);
+    this._target.parentNode.removeChild(this._target);
+
+    // Array.from(this._target.childNodes).forEach(child => {
+    //   this.appendChild(child);
+    // });
+
+    // this.style.display = '';
+  }
+}
diff --git a/src/util/StylableMixin.js b/src/util/StylableMixin.js
new file mode 100644
index 0000000..2270af3
--- /dev/null
+++ b/src/util/StylableMixin.js
@@ -0,0 +1,48 @@
+const StylableMixin = superClass => class JStylableMixin extends superClass {
+  connectedCallback() {
+    if (super.connectedCallback) super.connectedCallback();
+    this._gatherStyleModules();
+  }
+
+  _gatherStyleModules() {
+    // Gather global style modules
+    let styleModules = Array.from(document.querySelectorAll(`style[media]`));
+
+    if (this.getRootNode() != document) {
+      // Gather scoped style modules
+      styleModules = styleModules.concat(Array.from(this.getRootNode().querySelectorAll(`style[media]`)));
+    }
+
+    styleModules.forEach(style => {
+      if (!matches(this, style.getAttribute('media'))) return;
+
+      const clone = style.cloneNode(true);
+      clone.removeAttribute('media');
+      clone.setAttribute('module', '');
+      this.shadowRoot.appendChild(clone);
+    });
+  }
+
+  disconnectedCallback() {
+    if (super.disconnectedCallback) super.disconnectedCallback();
+
+    Array.from(this.shadowRoot.querySelectorAll('style[module]')).forEach(style => {
+      this.shadowRoot.removeChild(style);
+    });
+  }
+}
+
+export default StylableMixin;
+
+// Extended CSS selector matching, to support `parent::(child)`
+// TODO does not work work multi-level shadow roots, e.g. `parent1::(parent2::(child))`
+function matches(el, selector) {
+  const regexp = /(.*)::\((.*)\)/g;
+  const parts = regexp.exec(selector);
+
+  if (parts) {
+    selector = `:host(${parts[1]}) ${parts[2]}`;
+  }
+
+  return el.msMatchesSelector ? el.msMatchesSelector(selector) : el.matches(selector)
+}
diff --git a/src/util/applyStyles.js b/src/util/applyStyles.js
new file mode 100644
index 0000000..45bc260
--- /dev/null
+++ b/src/util/applyStyles.js
@@ -0,0 +1,11 @@
+// TODO unfinished ideas/work
+
+export function applyStyles(styleStr, component, scope) {
+  if (scope) {
+    styleStr = styleStr.replace('<style>', `<style type="global" for="${scope} ${component}, :host(${scope}) ${component}">`);
+  } else {
+    styleStr = styleStr.replace('<style>', `<style type="global" for="${component}">`);
+  }
+  // TODO this is probably a bad way to inject it
+  document.body.innerHTML += styleStr;
+}
diff --git a/src/bem-to-shadow.js b/src/util/bemToShadow.js
similarity index 81%
rename from src/bem-to-shadow.js
rename to src/util/bemToShadow.js
index fd33eca..22e2b3d 100644
--- a/src/bem-to-shadow.js
+++ b/src/util/bemToShadow.js
@@ -11,6 +11,11 @@
  * @return {String}              Shadow DOM style CSS
  */
 export default function bemToShadow(bemCss, hostSelector) {
+  if (!hostSelector) {
+    console.warn('No host selector specified. Skipping transformation.');
+    return bemCss;
+  }
+
   // Interpret the dot as a literal dot in the regexp
   const escapedHost = hostSelector.replace(/\./gm, '\\.');
 
@@ -41,5 +46,11 @@ export default function bemToShadow(bemCss, hostSelector) {
   regexp = new RegExp(escapedHost + '(\\S*?(?=::|\\s|,|\\{))', 'gm');
   shadowCss = shadowCss.replace(regexp, ':host($1)');
 
+  // Direct descendants is assumed to be inside light DOM:
+  // .block > label -> :host ::slotted(label)
+  // Note: `.block >` has already been replace with `.host >`
+  regexp = new RegExp(':host > (\\S*?(?=::|\\s|,|\\{))', 'gm');
+  shadowCss = shadowCss.replace(regexp, ':host ::slotted($1)');
+
   return shadowCss;
 }
diff --git a/src/teleporting-element.js b/src/util/teleporting-element.js
similarity index 98%
rename from src/teleporting-element.js
rename to src/util/teleporting-element.js
index a86154e..73f6db6 100644
--- a/src/teleporting-element.js
+++ b/src/util/teleporting-element.js
@@ -8,6 +8,10 @@ template.innerHTML = `
 `;
 
 /**
+ * @deprecated
+ *
+ * THIS UTILITY IS DEPRECATED. Consider using PortalElement instead.
+ *
  * Add the capability to 'teleport' the element under the `<body>` element when the `visible`
  * property is set (to escape all parent stacking contexts). When the `visible` property is not set
  * the element is hidden.
diff --git a/test/app-layout.html b/test/app-layout.html
index a456df3..dafb82e 100644
--- a/test/app-layout.html
+++ b/test/app-layout.html
@@ -2,21 +2,20 @@
 <html lang="en" dir="ltr">
   <head>
     <meta charset="utf-8">
-    <title>j-elements app-layout</title>
+    <title>JElements app-layout</title>
     <meta name="viewport" content="width=device-width, maximum-scale=1, minimum-scale=1">
     <meta name="apple-mobile-web-app-capable" content="yes">
     <meta name="apple-mobile-web-app-status-bar-style" content="default">
 
-    <script src="../node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
+    <!-- <script src="../node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script> -->
 
-    <link rel="stylesheet" href="../src/icons/bell.css">
-    <link rel="stylesheet" href="../src/icons/search.css">
+    <!-- <link rel="stylesheet" href="../src/icons/bell.css">
+    <link rel="stylesheet" href="../src/icons/search.css"> -->
 
     <script type="module">
       import '../src/j-app-layout.js';
       import '../src/j-placeholder.js';
-      import '../src/j-icon.js';
-      import '../src/j-avatar.js';
+      // import '../src/j-avatar.js';
     </script>
   </head>
   <body>
@@ -66,12 +65,12 @@
 
 
         j-icon[search] {
-          --svg: var(--j-icon-search);
+          /* --svg: var(--j-icon-search); */
           padding: 8px;
         }
 
         j-icon[bell] {
-          --svg: var(--j-icon-bell);
+          /* --svg: var(--j-icon-bell); */
           padding: 8px;
         }
 
diff --git a/test/components.html b/test/components.html
new file mode 100644
index 0000000..9557959
--- /dev/null
+++ b/test/components.html
@@ -0,0 +1,111 @@
+<!DOCTYPE html>
+<html lang="en" dir="ltr">
+  <head>
+    <meta charset="utf-8">
+    <title>JElements proving ground</title>
+
+    <script src="../site/node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
+
+    <script type="module">
+      import '../src/components/define-all.js';
+      import './foo-bar.js';
+      import foobarStyle from './foobar.css';
+
+      const styleEl = document.createElement('style');
+      styleEl.innerHTML = foobarStyle;
+      document.body.appendChild(styleEl);
+    </script>
+
+    <style>
+      body {
+        font-family: sans-serif;
+      }
+    </style>
+  </head>
+  <body>
+
+    <j-button>
+      <span>Click me</span>
+    </j-button>
+
+    <j-button>
+      <j-icon>Icon label</j-icon>
+    </j-button>
+
+    <j-field>
+      <label>Custom input</label>
+      <j-input required pattern="[0-9]+" error-message="Custom error"></j-input>
+    </j-field>
+
+    <j-field>
+      <label>Native input</label>
+      <input type="text" required pattern="[0-9]+">
+    </j-field>
+
+    <j-field>
+      <label>Birth date</label>
+      <input type="date" required>
+    </j-field>
+
+    <j-field>
+      <label>Birth date</label>
+      <j-input type="date" required>
+        <span slot="start">Foo</span>
+      </j-input>
+    </j-field>
+
+    <j-input value="Auto width" autosize></j-input>
+
+    <j-input value="123" type="number">
+      <span slot="start">$</span>
+      <span slot="end">.00</span>
+    </j-input>
+
+    <j-input value="Value" style="height: 3em;">
+      <span slot="start">🔍</span>
+      <span slot="end">▾</span>
+    </j-input>
+
+    <j-input multiline value="Value with \na line break">
+      <span slot="start">Start</span>
+      <span slot="end">End</span>
+    </j-input>
+
+    <j-input multiline value="Auto height" autosize>
+      <span slot="start">Start</span>
+      <span slot="end">End</span>
+    </j-input>
+
+    <j-field>
+      <label>Select an option</label>
+      <select required>
+        <option></option>
+        <option>Slack</option>
+        <option>Skype</option>
+        <option>Hipchat</option>
+      </select>
+    </j-field>
+
+    <script>
+      document.querySelector('j-input').addEventListener('change', function(e) {
+        console.log(this.value, e);
+      });
+
+      document.querySelector('j-button').addEventListener('click', function(e) {
+        console.log(e);
+      });
+    </script>
+
+    <foo-bar></foo-bar>
+
+    <button id="button">Actions</button>
+    <popup for="button" key-events="none">
+      <list key-events="forward">
+        <item>Option one</item>
+        <item>Option two</item>
+        <item>Option three</item>
+      </list>
+    </popup>
+
+  </body>
+</html>
diff --git a/test/custom-select-test.html b/test/custom-select-test.html
new file mode 100644
index 0000000..2cc90f5
--- /dev/null
+++ b/test/custom-select-test.html
@@ -0,0 +1,82 @@
+<!DOCTYPE html>
+<html lang="en" dir="ltr">
+  <head>
+    <meta charset="utf-8">
+    <title>custom select test</title>
+
+    <script src="../site/node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
+    <script type="module" src='./custom-select.js'></script>
+  </head>
+  <body>
+    <style>
+      body {
+        font-family: sans-serif;
+      }
+
+      .clipping-context {
+        outline: 1px dashed red;
+        overflow: hidden;
+        transform: translate3d(1px, 1px, 0);
+        padding: 10px;
+      }
+
+      [item] h4 {
+        margin: 0;
+      }
+
+      [item] p {
+        margin: 0;
+        color: #999;
+      }
+
+      .sub [item] {
+        color: blue;
+      }
+
+      .fixed {
+        position: fixed;
+        outline: 1px dotted blue;
+        top: 10px;
+        right: 10px;
+        height: 100%;
+        margin: 0;
+      }
+
+      .sub {
+        background: transparent;
+      }
+    </style>
+
+    <div class="clipping-context">
+      <custom-select>
+        <div item>
+          <h4>Option 1</h4>
+          <p>Secondary text for this item</p>
+        </div>
+        <div item>
+          <h4>Option 2</h4>
+          <p>Secondary text for this item</p>
+        </div>
+        <div item>
+          <h4>Option 3</h4>
+          <p>Secondary text for this item</p>
+        </div>
+        <custom-select class="sub">
+          <div item>
+            <h4>Sub-item 1</h4>
+            <p>Secondary text for this item</p>
+          </div>
+          <div item>
+            <h4>Sub-item 2</h4>
+            <p>Secondary text for this item</p>
+          </div>
+          <div item>
+            <h4>Sub-item 3</h4>
+            <p>Secondary text for this item</p>
+          </div>
+        </custom-select>
+      </custom-select>
+      <p class="fixed">position: fixed;</p>
+    </div>
+  </body>
+</html>
diff --git a/test/custom-select.js b/test/custom-select.js
new file mode 100644
index 0000000..57b55a9
--- /dev/null
+++ b/test/custom-select.js
@@ -0,0 +1,115 @@
+import { PortalElement } from '../src/util/PortalElement';
+
+class CustomSelectPopup extends PortalElement {
+  constructor() {
+    super();
+    this.attachShadow({mode:'open'}).innerHTML = `
+      <style>
+        :host {
+          display: block;
+          box-sizing: border-box;
+          background: #fff;
+          box-shadow: 0 2px 4px;
+          cursor: pointer;
+        }
+
+        :host([disabled]) {
+          visibility: hidden;
+          height: 0;
+          overflow: hidden;
+        }
+
+        :host(:not([disabled]):not([target])) {
+          position: fixed;
+        }
+
+        ::slotted([item]) {
+          padding: 8px 16px;
+        }
+
+        ::slotted([item]:hover) {
+          background-color: #eee;
+        }
+      </style>
+      <slot></slot>
+    `;
+
+    this.addEventListener('click', e => {
+      const item = e.target.closest('[item]');
+      if (item) {
+        this.disabled = true;
+        this.dispatchEvent(new CustomEvent('item-selected', { bubbles: true, detail: item }));
+        this.parentNode.host.focus();
+      }
+    });
+  }
+}
+window.customElements.define('custom-select-popup', CustomSelectPopup);
+
+class CustomSelect extends HTMLElement {
+  constructor() {
+    super();
+    this.setAttribute('tabindex', '0');
+    this.attachShadow({mode:'open'}).innerHTML = `
+      <style>
+        :host {
+          display: inline-block;
+          background: #ddd;
+          cursor: pointer;
+          box-sizing: border-box;
+          border-radius: .25em;
+        }
+
+        div {
+          display: inline-flex;
+          align-items: center;
+          height: 100%;
+        }
+
+        ::slotted([item]),
+        .placeholder {
+          padding: 8px 16px;
+        }
+
+        .placeholder {
+          opacity: 0.6;
+        }
+      </style>
+      <div>
+        <slot name="selected"><span class="placeholder">Select something</span></slot>
+      </div>
+      <custom-select-popup disabled tabindex="0">
+        <slot></slot>
+      </custom-select-popup>
+    `;
+
+    this.addEventListener('click', e => {
+      Array.from(this.children).filter(node => node.hasAttribute('item')).forEach(item => {
+        item.removeAttribute('slot');
+      });
+      const popup = this.shadowRoot.querySelector('custom-select-popup');
+
+      if (popup.isTarget) {
+        popup._source.disabled = true;
+        return;
+      }
+
+      const coords = this.getBoundingClientRect();
+      popup.style.top = (coords.y + coords.height) + 'px';
+      popup.style.left = coords.x + 'px';
+      popup.disabled = false;
+      if (popup.__scopeContainer) {
+        popup.__scopeContainer.className = this.className;
+      }
+      popup.focus();
+      popup._target.style.width = popup.offsetWidth + 'px';
+      popup._target.style.display = 'block';
+      e.stopPropagation();
+    });
+
+    this.shadowRoot.addEventListener('item-selected', e => {
+      e.detail.setAttribute('slot', 'selected');
+    });
+  }
+}
+window.customElements.define('custom-select', CustomSelect);
diff --git a/test/dev.html b/test/dev.html
index bb015cc..01603f5 100644
--- a/test/dev.html
+++ b/test/dev.html
@@ -2,7 +2,7 @@
 <html lang="en" dir="ltr">
   <head>
     <meta charset="utf-8">
-    <title>j-elements proving ground</title>
+    <title>JElements proving ground</title>
 
     <script src="../site/node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
 
diff --git a/test/foo-bar.js b/test/foo-bar.js
new file mode 100644
index 0000000..dfd2cd0
--- /dev/null
+++ b/test/foo-bar.js
@@ -0,0 +1,27 @@
+const template = document.createElement('template');
+template.innerHTML = `
+  <style>
+    :host {
+      display: block;
+      font-size: 2em;
+    }
+
+    [part="lorem"] {
+      color: blue;
+    }
+  </style>
+  <p>Foo bar</p>
+  <p part="lorem">Lorem</p>
+`;
+
+export class Foobar extends HTMLElement {
+  connectedCallback() {
+    if (!this.shadowRoot) {
+      this.attachShadow({mode: 'open'});
+      this.shadowRoot.appendChild(template.content.cloneNode(true));
+    }
+  }
+}
+
+export default Foobar;
+window.customElements.define('foo-bar', Foobar)
diff --git a/test/foobar.css.js b/test/foobar.css.js
new file mode 100644
index 0000000..0a1dabb
--- /dev/null
+++ b/test/foobar.css.js
@@ -0,0 +1,14 @@
+export default `
+
+foo-bar,
+.foo-bar {
+  outline: 1px solid red;
+}
+
+foo-bar::part(lorem),
+.foo-bar__lorem {
+  border: 2px solid green;
+  font-size: 0.6em;
+}
+
+`;
diff --git a/test/icons.html b/test/icons.html
index 334fc83..312251e 100644
--- a/test/icons.html
+++ b/test/icons.html
@@ -2,7 +2,7 @@
 <html lang="en" dir="ltr">
   <head>
     <meta charset="utf-8">
-    <title>j-elements j-icon</title>
+    <title>JElements j-icon</title>
     <meta name="viewport" content="width=device-width, maximum-scale=1, minimum-scale=1">
 
     <script src="../node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
diff --git a/src/stylable-mixin.js b/test/stylable-mixin-with-stylesheet-support.js
similarity index 76%
rename from src/stylable-mixin.js
rename to test/stylable-mixin-with-stylesheet-support.js
index d500286..f082fc3 100644
--- a/src/stylable-mixin.js
+++ b/test/stylable-mixin-with-stylesheet-support.js
@@ -1,10 +1,32 @@
+// Works with <link rel="stylesheet" href="theme.css" media="x-button">
+
 // Needed for ShadyCSS
 // Module identifier
 let moduleCounter = 0;
 // Module class prefix
 const MODULE_CLASS_PREFIX = '_smod_';
 
+const themes = {};
+
 export const StylableMixin = superClass => class JStylableMixin extends superClass {
+  constructor() {
+    super();
+
+    // Do only once per component type (not for every instance)
+    if (!themes[this.nodeName]) {
+      // document.querySelectorAll is faster than document.styleSheets in the common case where
+      // there is only one stylesheet per component. And we get to remove the link element from the
+      // DOM after processing (probably reduces memory consumption)
+      Array.prototype.forEach.call(document.querySelectorAll(`link[media="${this.nodeName.toLowerCase()}"]`), link => {
+        themes[this.nodeName] = document.createElement('style');
+        Array.prototype.forEach.call(link.sheet.cssRules, rule => {
+          themes[this.nodeName].innerHTML += rule.cssText;
+        });
+        link.parentNode.removeChild(link);
+      });
+    }
+  }
+
   connectedCallback() {
     if (super.connectedCallback) super.connectedCallback();
     if (typeof ShadyCSS != 'undefined' && !ShadyCSS.nativeShadow) {
@@ -14,6 +36,12 @@ export const StylableMixin = superClass => class JStylableMixin extends superCla
   }
 
   _gatherStyleModules() {
+    if (themes[this.nodeName] && !this._themeApplied) {
+      const theme = themes[this.nodeName].cloneNode(true);
+      this.shadowRoot.appendChild(theme);
+      this._themeApplied = true;
+    }
+
     // Gather style modules (scoped and global)
     let styleModules = Array.from(this.getRootNode().querySelectorAll(`style[type=scoped]`));
     styleModules = styleModules.concat(Array.from(document.querySelectorAll(`style[type=global]`)));
@@ -97,13 +125,3 @@ function matches(el, selector) {
 
   return el.msMatchesSelector ? el.msMatchesSelector(selector) : el.matches(selector)
 }
-
-export function applyStyles(styleStr, component, scope) {
-  if (scope) {
-    styleStr = styleStr.replace('<style>', `<style type="global" for="${scope} ${component}, :host(${scope}) ${component}">`);
-  } else {
-    styleStr = styleStr.replace('<style>', `<style type="global" for="${component}">`);
-  }
-  // TODO this is probably a bad way to inject it
-  document.body.innerHTML += styleStr;
-}
diff --git a/test/teleport.html b/test/teleport.html
new file mode 100644
index 0000000..13b5db1
--- /dev/null
+++ b/test/teleport.html
@@ -0,0 +1,122 @@
+<!DOCTYPE html>
+<html lang="en" dir="ltr">
+  <head>
+    <meta charset="utf-8">
+    <title>teleport slot test</title>
+
+    <script src="../site/node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
+
+    <script type="module">
+      // import StylableMixin from '../src/util/StylableMixin';
+      import { PortalElement } from '../src/util/PortalElement';
+
+      class XFoo extends HTMLElement {
+        connectedCallback() {
+          this.attachShadow({mode: 'open'});
+          this.shadowRoot.innerHTML = `
+            <style>
+              tele-port {
+                color: red;
+              }
+            </style>
+            <tele-port>
+              <div class="header">
+                <slot name="header"></slot>
+              </div>
+              <slot></slot>
+            </tele-port>
+          `;
+        }
+      }
+      customElements.define('x-foo', XFoo);
+
+      class Teleport extends PortalElement {}
+      customElements.define('tele-port', Teleport);
+
+
+      class Drawer extends HTMLElement {
+        connectedCallback() {
+          this.attachShadow({mode: 'open'});
+          this.shadowRoot.innerHTML = `
+            <style>
+              :host {
+                display: block;
+              }
+
+              tele-port {
+                display: block !important;
+                height: 200px;
+                width: 200px;
+                background: gray;
+              }
+
+              tele-port:not([disabled]) {
+                position: fixed;
+                top: 0;
+                bottom: 0;
+                left: 0;
+              }
+
+              .foo tele-port {
+                background-color: red;
+              }
+            </style>
+            <div class="foo">
+            <tele-port disabled>
+              <button>Toggle</button>
+              <slot></slot>
+            </tele-port>
+            </div>
+          `;
+          this.shadowRoot.querySelector('button').addEventListener('click', e => {
+            this.toggle();
+          });
+        }
+
+        toggle() {
+          this.classList.toggle('open');
+          const portal = this.shadowRoot.querySelector('tele-port');
+          portal.disabled = !portal.disabled;
+        }
+      }
+      customElements.define('x-drawer', Drawer);
+    </script>
+
+    <style>
+      tele-port {
+        display: block;
+        color: blue;
+      }
+
+      tele-port p {
+        font-weight: bold;
+      }
+
+      .parent .child {
+        color: orange;
+      }
+
+      .parent tele-port {
+        border: 2px solid red;
+      }
+    </style>
+  </head>
+  <body>
+
+    <x-foo>
+      <h3 slot="header">Named slot</h3>
+      <p>Default slot</p>
+    </x-foo>
+
+    <div class="parent">
+      <tele-port>
+        <p class="child">Teleported 2</p>
+      </tele-port>
+    </div>
+
+    <x-drawer>
+      Drawer content
+    </x-drawer>
+
+  </body>
+</html>
diff --git a/test/themer.html b/test/themer.html
new file mode 100644
index 0000000..a9c9164
--- /dev/null
+++ b/test/themer.html
@@ -0,0 +1,69 @@
+<!DOCTYPE html>
+<html lang="en" dir="ltr">
+  <head>
+    <meta charset="utf-8">
+    <title></title>
+    <script>
+      // Select the node that will be observed for mutations
+      var targetNode = document.documentElement;
+
+      // Options for the observer (which mutations to observe)
+      var config = { childList: true, subtree: true };
+
+      window.partMap = {};
+
+      // Callback function to execute when mutations are observed
+      var callback = function(mutationsList, observer) {
+        for (var mutation of mutationsList) {
+          if (mutation.type == 'childList') {
+            mutation.addedNodes.forEach(node => {
+              if (node.localName == 'style') {
+                var regex = new RegExp('([^\\s(?=::|\\s|,)]+)::part\\(([^()]*)\\)[\\s|^?={]*{\\s([^(?={}]+)\\s}', 'gm');
+                console.log(node.innerHTML)
+                var match;
+                while ((match = regex.exec(node.innerHTML)) !== null) {
+                  console.log(match[1], match[2], match[3])
+                  // var selector = match[1];
+                  // var part = match[2];
+                  // if (window.partMap[selector]) {
+                  //   window.partMap[selector] = {};
+                  // }
+                  // if (window.partMap[selector][part]) {
+                  //   window.partMap[selector][part] = [];
+                  // }
+                  // window.partMap[selector][part].push()
+                }
+              }
+            })
+          }
+        }
+      };
+
+      // Create an observer instance linked to the callback function
+      var observer = new MutationObserver(callback);
+
+      // Start observing the target node for configured mutations
+      observer.observe(targetNode, config);
+
+      // Later, you can stop observing
+      // observer.disconnect();
+
+      setTimeout(function() {
+        const style = document.createElement('style');
+        style.innerHTML = 'x-foo::part(inner){ color: red; } x-bar::part(foobar), someting::before, .class[attr],.another-class::part(crap) { lorem: ipsum; }';
+        document.body.appendChild(style);
+      });
+
+      setTimeout(function() {
+        const foo = document.createElement('x-foo');
+        foo.innerHTML = 'foo2';
+        document.body.appendChild(foo);
+      });
+    </script>
+  </head>
+  <body>
+
+    <x-foo>foo1</x-foo>
+
+  </body>
+</html>
diff --git a/test/themes/index.html b/test/themes/index.html
new file mode 100644
index 0000000..f9e41e6
--- /dev/null
+++ b/test/themes/index.html
@@ -0,0 +1,119 @@
+<!DOCTYPE html>
+<html lang="en" dir="ltr">
+  <head>
+    <meta charset="utf-8">
+    <title>themes test</title>
+
+    <script src="../../site/node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
+
+    <script type="module">
+      import {StylableMixin, applyStyles} from '../../src/util/StylableMixin.js';
+      import {applyStyles} from '../../src/util/applyStyles.js';
+      import {JButton} from '../../src/components/JButton.js';
+      import buttonTheme from './j-button-theme.js';
+
+      class XButton extends StylableMixin(HTMLElement) {
+        connectedCallback() {
+          this.attachShadow({mode: 'open'});
+          this.shadowRoot.innerHTML = `
+            <button>
+              <slot></slot>
+            </button>
+          `;
+
+          super.connectedCallback();
+        }
+      }
+      customElements.define('x-button', XButton);
+
+      class ThemeOne extends StylableMixin(HTMLElement) {
+        connectedCallback() {
+          this.attachShadow({mode: 'open'});
+          this.shadowRoot.innerHTML += `
+            <h3>Theme One</h3>
+            <x-button>x-button</x-button>
+            <j-button>j-button</j-button>
+          `;
+
+          super.connectedCallback();
+        }
+      }
+      customElements.define('theme-one', ThemeOne);
+
+      class ThemeTwo extends StylableMixin(HTMLElement) {
+        connectedCallback() {
+          this.attachShadow({mode: 'open'});
+          this.shadowRoot.innerHTML = `
+            <h3>Theme Two</h3>
+            <x-button>x-button</x-button>
+            <j-button>j-button</j-button>
+          `;
+
+          super.connectedCallback();
+        }
+      }
+      customElements.define('theme-two', ThemeTwo);
+
+      applyStyles(buttonTheme, '', 'theme-two')
+    </script>
+
+    <!-- <style type="global" for="theme-one, theme-two">
+      :host {
+        display: block;
+      }
+    </style> -->
+
+    <!-- <style type="global" for="x-button">
+      button {
+        display: inline-flex;
+        border: 2px solid;
+        border-radius: 6px;
+        padding: 0.4em 0.8em;
+        background: transparent;
+        font: inherit;
+      }
+    </style> -->
+
+    <!-- <style type="global" for="theme-one::(x-button)">
+      button {
+        border: 4px dashed;
+        color: green;
+      }
+    </style>
+
+    <style type="global" for="theme-two::(x-button)">
+      button {
+        border-radius: 50%;
+        color: blue;
+      }
+    </style>
+
+    <style type="global" for=".theme-three x-button">
+      button {
+        font-size: 2em;
+        color: red;
+      }
+    </style> -->
+  </head>
+  <body>
+    <h3>Default theme</h3>
+
+    <button>native</button>
+
+    <x-button>x-button</x-button>
+
+    <j-button>j-button</j-button>
+
+    <theme-one></theme-one>
+
+    <theme-two></theme-two>
+
+    <div class="theme-three">
+      <x-button>x-button</x-button>
+      <j-button>j-button</j-button>
+    </div>
+
+
+
+  </body>
+</html>
diff --git a/test/themes/j-button-theme.js b/test/themes/j-button-theme.js
new file mode 100644
index 0000000..64c887a
--- /dev/null
+++ b/test/themes/j-button-theme.js
@@ -0,0 +1,15 @@
+let innerHTML = `
+  <style>
+    .j-button {
+      border-radius: 8px;
+      font-family: sans-serif;
+      font-weight: bold;
+      font-size: 1.2em;
+      background: orange;
+      color: black;
+      border: none;
+    }
+  </style>
+`;
+
+export default innerHTML;
diff --git a/test/themes/theme-one.js b/test/themes/theme-one.js
new file mode 100644
index 0000000..68a6af7
--- /dev/null
+++ b/test/themes/theme-one.js
@@ -0,0 +1,23 @@
+// By using "var innerHTML" we allow IDEs (at least Atom) to use correct syntax highlighting and code completion
+let innerHTML = `
+  <style>
+    button {
+      display: inline-flex;
+      border: 2px solid;
+      border-radius: 6px;
+      padding: 0.4em 0.8em;
+      background: transparent;
+      font: inherit;
+    }
+  </style>
+`;
+
+export default innerHTML;
+
+export function scopeFor(themeName, tagName) {
+  const temp = document.createElement('div');
+  temp.innerHTML = innerHTML;
+  temp.firstElementChild.setAttribute('type', 'global');
+  temp.firstElementChild.setAttribute('for', `.${themeName} ${tagName}, :host(.${themeName}) ${tagName}`);
+  document.body.appendChild(temp.firstElementChild);
+}
diff --git a/test/top.html b/test/top.html
index b89f926..e248b89 100644
--- a/test/top.html
+++ b/test/top.html
@@ -2,7 +2,7 @@
 <html lang="en" dir="ltr">
   <head>
     <meta charset="utf-8">
-    <title>j-elements app-layout</title>
+    <title>JElements app-layout</title>
     <meta name="viewport" content="width=device-width, maximum-scale=1, minimum-scale=1">
     <meta name="apple-mobile-web-app-capable" content="yes">
     <meta name="apple-mobile-web-app-status-bar-style" content="default">