Migrated Libraries/WebSocket/* to export syntax. (#48884)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/48884

## Motivation
Modernising the react-native codebase to allow for ingestion by modern Flow tooling.

## This diff
- Updates files in `Libraries/WebSocket` to use `export` syntax
- Appends `.default` to requires of the changed files.
- Updates mocks.
- Updates the public API snapshot (intented breaking change)

Changelog:
[General][Breaking] - Files inside `Libraries/WebSocket` use `export` syntax, which requires the addition of `.default` when imported with the CJS `require` syntax.

Reviewed By: cortinico

Differential Revision: D68554260

fbshipit-source-id: 90a660fe9e76b255171189101819253521354fda

packages/react-native/Libraries/Core/setUpReactDevTools.js

@@ -155,7 +155,7 @@ if (__DEV__) {
           ? window.__REACT_DEVTOOLS_PORT__
           : 8097;
 
-      const WebSocket = require('../WebSocket/WebSocket');
+      const WebSocket = require('../WebSocket/WebSocket').default;
       ws = new WebSocket('ws://' + host + ':' + port);
       ws.addEventListener('close', event => {
         isWebSocketOpen = false;

packages/react-native/Libraries/Core/setUpXHR.js

@@ -25,7 +25,7 @@ polyfillGlobal('fetch', () => require('../Network/fetch').fetch);
 polyfillGlobal('Headers', () => require('../Network/fetch').Headers);
 polyfillGlobal('Request', () => require('../Network/fetch').Request);
 polyfillGlobal('Response', () => require('../Network/fetch').Response);
-polyfillGlobal('WebSocket', () => require('../WebSocket/WebSocket'));
+polyfillGlobal('WebSocket', () => require('../WebSocket/WebSocket').default);
 polyfillGlobal('Blob', () => require('../Blob/Blob').default);
 polyfillGlobal('File', () => require('../Blob/File').default);
 polyfillGlobal('FileReader', () => require('../Blob/FileReader').default);

packages/react-native/Libraries/Inspector/NetworkOverlay.js

@@ -21,7 +21,8 @@ const FlatList = require('../Lists/FlatList');
 const XHRInterceptor = require('../Network/XHRInterceptor');
 const StyleSheet = require('../StyleSheet/StyleSheet');
 const Text = require('../Text/Text');
-const WebSocketInterceptor = require('../WebSocket/WebSocketInterceptor');
+const WebSocketInterceptor =
+  require('../WebSocket/WebSocketInterceptor').default;
 
 const LISTVIEW_CELL_HEIGHT = 15;
 

packages/react-native/Libraries/WebSocket/WebSocket.js

@@ -294,4 +294,4 @@ class WebSocket extends (EventTarget(...WEBSOCKET_EVENTS): typeof EventTarget) {
   }
 }
 
-module.exports = WebSocket;
+export default WebSocket;

packages/react-native/Libraries/WebSocket/WebSocketEvent.js

@@ -27,4 +27,4 @@ class WebSocketEvent {
   }
 }
 
-module.exports = WebSocketEvent;
+export default WebSocketEvent;

packages/react-native/Libraries/WebSocket/WebSocketInterceptor.js

@@ -244,4 +244,4 @@ const WebSocketInterceptor = {
   },
 };
 
-module.exports = WebSocketInterceptor;
+export default WebSocketInterceptor;

packages/react-native/Libraries/WebSocket/__mocks__/event-target-shim.js

@@ -24,4 +24,4 @@ function EventTarget() {
   }
 }
 
-module.exports = EventTarget;
+export default EventTarget;

packages/react-native/Libraries/WebSocket/__tests__/WebSocket-test.js

@@ -21,7 +21,7 @@ jest.setMock('../../BatchedBridge/NativeModules', {
   },
 });
 
-const WebSocket = require('../WebSocket');
+const WebSocket = require('../WebSocket').default;
 
 describe('WebSocket', function () {
   it('should have connection lifecycle constants defined on the class', () => {

packages/react-native/Libraries/__tests__/__snapshots__/public-api-test.js.snap

@@ -9480,7 +9480,7 @@ declare class WebSocket extends EventTarget {
   _unregisterEvents(): void;
   _registerEvents(): void;
 }
-declare module.exports: WebSocket;
+declare export default typeof WebSocket;
 "
 `;
 
@@ -9489,7 +9489,7 @@ exports[`public API should not change unintentionally Libraries/WebSocket/WebSoc
   type: string;
   constructor(type: string, eventInitDict: ?{ ... }): void;
 }
-declare module.exports: WebSocketEvent;
+declare export default typeof WebSocketEvent;
 "
 `;
 
@@ -9509,7 +9509,7 @@ exports[`public API should not change unintentionally Libraries/WebSocket/WebSoc
   _arrayBufferToString(data: string): ArrayBuffer | string,
   disableInterception(): void,
 };
-declare module.exports: WebSocketInterceptor;
+declare export default typeof WebSocketInterceptor;
 "
 `;