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PB Sweep
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Add DOM_fundamentals.md
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‎05-Guess-My-Number/working/.prettierrc

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{
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"singleQuote": true,
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"arrowParens": "avoid"
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}

‎05-Guess-My-Number/working/index.html

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<meta http-equiv="X-UA-Compatible" content="ie=edge" />
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<link rel="stylesheet" href="style.css" />
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<title>Guess My Number!</title>
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</head>
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<body>
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<header>
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<h1>Guess My Number!</h1>
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<p class="between">(Between 1 and 20)</p>
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<button class="btn again">Again!</button>
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<div class="number">?</div>
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</header>
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<main>
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<section class="left">
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<input type="number" class="guess" />
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<button class="btn check">Check!</button>
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</section>
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<section class="right">
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<p class="message">Start guessing...</p>
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<p class="label-score">💯 Score: <span class="score">20</span></p>
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<p class="label-highscore">
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🥇 Highscore: <span class="highscore">0</span>
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</p>
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</section>
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</main>
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<script src="script.js"></script>
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</body>
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</html>

‎05-Guess-My-Number/working/script.js

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'use strict';
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/*
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// Get textContent from the element
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console.log(document.querySelector('.message').textContent);
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// Set content
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document.querySelector('.message').textContent = '🎉 Correct Number!';
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// Get textContent from the element
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console.log(document.querySelector('.message').textContent);
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document.querySelector('.number').textContent = 13;
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document.querySelector('.score').textContent = 10;
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document.querySelector('.guess').value = 23;
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console.log(document.querySelector('.guess').value);
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*/
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/* click events */
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document.querySelector('.check').addEventListener('click', function () {
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const guess = Number(document.querySelector('.guess').value);
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console.log(guess)
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if (!guess) {
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document.querySelector('.message').textContent = 'No Number!';
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}
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});

‎05-Guess-My-Number/working/style.css

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@import url('https://fonts.googleapis.com/css?family=Press+Start+2P&display=swap');
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* {
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margin: 0;
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padding: 0;
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box-sizing: inherit;
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}
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html {
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font-size: 62.5%;
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box-sizing: border-box;
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}
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body {
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font-family: 'Press Start 2P', sans-serif;
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color: #eee;
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background-color: #222;
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/* background-color: #60b347; */
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}
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/* LAYOUT */
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header {
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position: relative;
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height: 35vh;
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border-bottom: 7px solid #eee;
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}
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main {
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height: 65vh;
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color: #eee;
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display: flex;
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align-items: center;
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justify-content: space-around;
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}
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.left {
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width: 52rem;
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display: flex;
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flex-direction: column;
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align-items: center;
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}
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.right {
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width: 52rem;
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font-size: 2rem;
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}
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/* ELEMENTS STYLE */
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h1 {
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font-size: 4rem;
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text-align: center;
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position: absolute;
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width: 100%;
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top: 52%;
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left: 50%;
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transform: translate(-50%, -50%);
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}
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.number {
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background: #eee;
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color: #333;
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font-size: 6rem;
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width: 15rem;
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padding: 3rem 0rem;
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text-align: center;
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position: absolute;
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bottom: 0;
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left: 50%;
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transform: translate(-50%, 50%);
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}
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.between {
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font-size: 1.4rem;
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position: absolute;
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top: 2rem;
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right: 2rem;
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}
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.again {
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position: absolute;
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top: 2rem;
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left: 2rem;
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}
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.guess {
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background: none;
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border: 4px solid #eee;
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font-family: inherit;
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color: inherit;
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font-size: 5rem;
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padding: 2.5rem;
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width: 25rem;
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text-align: center;
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display: block;
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margin-bottom: 3rem;
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}
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.btn {
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border: none;
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background-color: #eee;
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color: #222;
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font-size: 2rem;
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font-family: inherit;
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padding: 2rem 3rem;
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cursor: pointer;
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}
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.btn:hover {
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background-color: #ccc;
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}
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.message {
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margin-bottom: 8rem;
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height: 3rem;
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}
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.label-score {
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margin-bottom: 2rem;
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}

‎notes/DOM_fundamentals.md

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# DOM Fundamentals
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Document Object Model
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Structured representation of HTML documents.
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Allows JS to access HTML elements and styles to manipulate them.
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DOM is a tree structure.
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DOM always starts with `document` object at the top. It's the entry point to the DOM (e.g. `document.querySelector()`)
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DOM is not part of JavaScript.
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DOM Methods and Properties are part of Web APIs (which we can interact with JS).
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There are other Web APIs such as timer, fetch etc.
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## Getting and setting values
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### Getting text values
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```js
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// Gets the text context of 'message' class and logs to console
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console.log(document.querySelector('.message').textContent);
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```
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```js
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// Gets the value of an input field with class 'guess'
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console.log(document.querySelector('.guess').value);
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```
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### Setting text values
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```js
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// Sets the content of 'score' class to 10
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document.querySelector('.score').textContent = 10;
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```
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```js
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// Sets the value of an input field with class 'guess' to 20
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document.querySelector('.guess').value = 20;
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```
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### Getting and setting style values
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```js
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// Sets the background-color of 'body' element to #60b347
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// Note: the css property has an equivalent camel case style in JS
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document.querySelector('body').style.backgroundColor = '#60b347';
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// Sets the width of the 'number' class to 30rem
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document.querySelector('.number').style.width = '30rem';
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```
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## Click events
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Say we want to get the value of a text field (class='guess') once a button (class='check') is clicked.
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```js
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document.querySelector('.check').addEventListener(
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'click',
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function() {
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console.log(document.querySelector('.guess').value)
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}
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);
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```
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The first argument of `addEventListener` method is `click`. Second argument is an anonymous function that does something.

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