Translation for the page 'React.Component' (#118)

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Too many typos!!! XD

Co-Authored-By: LucaBlackDragon <[email protected]>

* Fix broken build

Author: LucaBlackDragon

GLOSSARY.md

@@ -34,6 +34,7 @@ Suggestion on words and terms:
 | React component class | classe componente React |
 | React component type | tipo componente React |
 | function component | componente funzione |
+| error boundary | contenitore di errori |
 
 ## Problematic terms
 

content/docs/code-splitting.md

@@ -189,9 +189,9 @@ function MyComponent() {
 }
 ```
 
-### Error boundaries {#error-boundaries}
+### Contenitori di Errori {#error-boundaries}
 
-If the other module fails to load (for example, due to network failure), it will trigger an error. You can handle these errors to show a nice user experience and manage recovery with [Error Boundaries](/docs/error-boundaries.html). Once you've created your Error Boundary, you can use it anywhere above your lazy components to display an error state when there's a network error.
+If the other module fails to load (for example, due to network failure), it will trigger an error. You can handle these errors to show a nice user experience and manage recovery with [Contenitori di Errori](/docs/error-boundaries.html). Once you've created your Contenitore di Errori, you can use it anywhere above your lazy components to display an error state when there's a network error.
 
 ```js
 import MyErrorBoundary from './MyErrorBoundary';

content/docs/codebase-overview.md

@@ -209,7 +209,7 @@ Its main goals are:
 * Ability to prioritize, rebase and reuse work in progress.
 * Ability to yield back and forth between parents and children to support layout in React.
 * Ability to return multiple elements from `render()`.
-* Better support for error boundaries.
+* Migliore supporto per i contenitori di errori.
 
 You can read more about React Fiber Architecture [here](https://github.com/acdlite/react-fiber-architecture) and [here](https://medium.com/react-in-depth/inside-fiber-in-depth-overview-of-the-new-reconciliation-algorithm-in-react-e1c04700ef6e). While it has shipped with React 16, the async features are not enabled by default yet.
 

content/docs/error-boundaries.md

@@ -1,6 +1,6 @@
 ---
 id: error-boundaries
-title: Error Boundaries
+title: Contenitori di Errori
 permalink: docs/error-boundaries.html
 ---
 

content/docs/nav.yml

@@ -44,7 +44,7 @@
     - id: context
       title: Context
     - id: error-boundaries
-      title: Error Boundaries
+      title: Contenitori di Errori
     - id: forwarding-refs
       title: Forwarding Refs
     - id: fragments

content/docs/react-without-es6.md

@@ -1,6 +1,6 @@
 ---
 id: react-without-es6
-title: React Without ES6
+title: React senza ES6
 permalink: docs/react-without-es6.html
 ---
 

content/docs/reference-react-component.md

@@ -24,7 +24,7 @@ React components let you split the UI into independent, reusable pieces, and thi
  - [`React.Component`](#reactcomponent)
  - [`React.PureComponent`](#reactpurecomponent)
 
-If you don't use ES6 classes, you may use the `create-react-class` module instead. See [Using React without ES6](/docs/react-without-es6.html) for more information.
+If you don't use ES6 classes, you may use the `create-react-class` module instead. See [React senza ES6](/docs/react-without-es6.html) for more information.
 
 React components can also be defined as functions which can be wrapped:
 

content/docs/reference-react.md

@@ -1,32 +1,42 @@
-class ScrollingList extends React.Component {
+class ListaScorrimento extends React.Component {
   constructor(props) {
     super(props);
-    this.listRef = React.createRef();
+    this.rifLista = React.createRef();
   }
 
-  getSnapshotBeforeUpdate(prevProps, prevState) {
-    // Are we adding new items to the list?
-    // Capture the scroll position so we can adjust scroll later.
-    if (prevProps.list.length < this.props.list.length) {
-      const list = this.listRef.current;
-      return list.scrollHeight - list.scrollTop;
+  getSnapshotBeforeUpdate(
+    propsPrecedenti,
+    statePrecedente
+  ) {
+    // Stiamo aggiungendo nuovi elementi alla lista?
+    // Salviamo la posizione dello scroll in modo da poterla aggiustare in seguito.
+    if (
+      propsPrecedenti.list.length < this.props.list.length
+    ) {
+      const lista = this.rifLista.current;
+      return lista.scrollHeight - lista.scrollTop;
     }
     return null;
   }
 
-  componentDidUpdate(prevProps, prevState, snapshot) {
-    // If we have a snapshot value, we've just added new items.
-    // Adjust scroll so these new items don't push the old ones out of view.
-    // (snapshot here is the value returned from getSnapshotBeforeUpdate)
+  componentDidUpdate(
+    propsPrecedenti,
+    statePrecedente,
+    snapshot
+  ) {
+    // Se snapshot è definito, abbiamo appenan aggiunto nuovi elementi alla lista.
+    // Aggiustiamo lo scroll in modo che i nuovi elementi non spingano quelli
+    // preesistenti fuori dallo schermo.
+    // (snapshot contiene il valore restituito da getSnapshotBeforeUpdate)
     if (snapshot !== null) {
-      const list = this.listRef.current;
-      list.scrollTop = list.scrollHeight - snapshot;
+      const lista = this.rifLista.current;
+      lista.scrollTop = lista.scrollHeight - snapshot;
     }
   }
 
   render() {
     return (
-      <div ref={this.listRef}>{/* ...contents... */}</div>
+      <div ref={this.rifLista}>{/* ...contenuti... */}</div>
     );
   }
 }