VerteDinde/index.html

## index.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <!-- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP -->
    <meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self'">
    <title>Hello World!</title>
  </head>
  <body>
    <h1>Hello World!</h1>
    We are using Node.js <span id="node-version"></span>,
    Chromium <span id="chrome-version"></span>,
    and Electron <span id="electron-version"></span>.

    <!-- You can also require other files to run in this process -->
    <script src="./renderer.js"></script>
  </body>
</html>

## main.js
// Modules to control application life and create native browser window
const { app, BrowserWindow, MessageChannelMain } = require('electron')
const path = require('path')

async function createWindow () {
  // Create the browser window.
  const mainWindow = new BrowserWindow({
    width: 1000,
    height: 1000,
    webPreferences: {
      nodeIntegration: true,
      contextIsolation: false,
      preload: path.join(__dirname, 'preload.js')
    }
  })

  // const { port1, port2 } = new MessageChannelMain();
  // const v8Util = process._linkedBinding('electron_common_v8_util');

  // await new Promise(resolve => {
  //   port2.start();
  //   port2.onclose = () => {
  //     resolve();
  //   };
  //   v8Util.requestGarbageCollectionForTesting();

  //   setTimeout(() => {
  //     port2.close()
  //   }, 5000);
  // });

  // and load the index.html of the app.
  mainWindow.loadFile('index.html')

  // Open the DevTools.
  mainWindow.webContents.openDevTools()
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.whenReady().then(() => {
  createWindow()

  app.on('activate', function () {
    // On macOS it's common to re-create a window in the app when the
    // dock icon is clicked and there are no other windows open.
    if (BrowserWindow.getAllWindows().length === 0) createWindow()
  })
})

// Quit when all windows are closed, except on macOS. There, it's common
// for applications and their menu bar to stay active until the user quits
// explicitly with Cmd + Q.
app.on('window-all-closed', function () {
  if (process.platform !== 'darwin') app.quit()
})

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.

## package.json
{
  "name": "message-port-renderer",
  "productName": "message-port-renderer",
  "description": "My Electron application description",
  "keywords": [],
  "main": "./main.js",
  "version": "1.0.0",
  "author": "khammond",
  "scripts": {
    "start": "electron ."
  },
  "dependencies": {},
  "devDependencies": {
    "electron": "999.999.999"
  }
}

## preload.js
// All of the Node.js APIs are available in the preload process.
// It has the same sandbox as a Chrome extension.
window.addEventListener('DOMContentLoaded', () => {
  const replaceText = (selector, text) => {
    const element = document.getElementById(selector)
    if (element) element.innerText = text
  }

  for (const type of ['chrome', 'node', 'electron']) {
    replaceText(`${type}-version`, process.versions[type])
  }
})

## renderer.js
(async function () {
  const { port2 } = new MessageChannel();
  await new Promise(resolve => {
    port2.start();
    port2.onclose = () => {
      console.log('GC onClose')
      resolve();
    };

    gc();

    setTimeout(() => {
      port2.close();
    }, 10000);
  });
})()
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	<!-- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP -->
	<meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self'">
	<title>Hello World!</title>
	</head>
	<body>
	<h1>Hello World!</h1>
	We are using Node.js <span id="node-version"></span>,
	Chromium <span id="chrome-version"></span>,
	and Electron <span id="electron-version"></span>.

	<!-- You can also require other files to run in this process -->
	<script src="./renderer.js"></script>
	</body>
	</html>
	// Modules to control application life and create native browser window
	const { app, BrowserWindow, MessageChannelMain } = require('electron')
	const path = require('path')

	async function createWindow () {
	// Create the browser window.
	const mainWindow = new BrowserWindow({
	width: 1000,
	height: 1000,
	webPreferences: {
	nodeIntegration: true,
	contextIsolation: false,
	preload: path.join(__dirname, 'preload.js')
	}
	})

	// const { port1, port2 } = new MessageChannelMain();
	// const v8Util = process._linkedBinding('electron_common_v8_util');

	// await new Promise(resolve => {
	// port2.start();
	// port2.onclose = () => {
	// resolve();
	// };
	// v8Util.requestGarbageCollectionForTesting();

	// setTimeout(() => {
	// port2.close()
	// }, 5000);
	// });

	// and load the index.html of the app.
	mainWindow.loadFile('index.html')

	// Open the DevTools.
	mainWindow.webContents.openDevTools()
	}

	// This method will be called when Electron has finished
	// initialization and is ready to create browser windows.
	// Some APIs can only be used after this event occurs.
	app.whenReady().then(() => {
	createWindow()

	app.on('activate', function () {
	// On macOS it's common to re-create a window in the app when the
	// dock icon is clicked and there are no other windows open.
	if (BrowserWindow.getAllWindows().length === 0) createWindow()
	})
	})

	// Quit when all windows are closed, except on macOS. There, it's common
	// for applications and their menu bar to stay active until the user quits
	// explicitly with Cmd + Q.
	app.on('window-all-closed', function () {
	if (process.platform !== 'darwin') app.quit()
	})

	// In this file you can include the rest of your app's specific main process
	// code. You can also put them in separate files and require them here.
	{
	"name": "message-port-renderer",
	"productName": "message-port-renderer",
	"description": "My Electron application description",
	"keywords": [],
	"main": "./main.js",
	"version": "1.0.0",
	"author": "khammond",
	"scripts": {
	"start": "electron ."
	},
	"dependencies": {},
	"devDependencies": {
	"electron": "999.999.999"
	}
	}
	// All of the Node.js APIs are available in the preload process.
	// It has the same sandbox as a Chrome extension.
	window.addEventListener('DOMContentLoaded', () => {
	const replaceText = (selector, text) => {
	const element = document.getElementById(selector)
	if (element) element.innerText = text
	}

	for (const type of ['chrome', 'node', 'electron']) {
	replaceText(`${type}-version`, process.versions[type])
	}
	})
	(async function () {
	const { port2 } = new MessageChannel();
	await new Promise(resolve => {
	port2.start();
	port2.onclose = () => {
	console.log('GC onClose')
	resolve();
	};

	gc();

	setTimeout(() => {
	port2.close();
	}, 10000);
	});
	})()