phwang4/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'; style-src 'self' 'unsafe-inline'">
    <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>.
    <video id="vid" />
    <!-- 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, ipcMain, desktopCapturer } = require('electron')
const path = require('path')
app.commandLine.appendSwitch('disable-features', 'IOSurfaceCapturer,DesktopCaptureMacV2')
/* This line causes screen share to fail
If you uncomment the line it will work but not hide the second window */
app.commandLine.appendSwitch('enable-features', 'ScreenCaptureKitMac');
let secondWindow
function createWindow() {
  // Create the browser window.
  const mainWindow = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      preload: path.join(__dirname, 'preload.js'),
    }
  })
  mainWindow.setContentProtection(true)
  // and load the index.html of the app.
  mainWindow.loadFile('index.html')
  // Open the DevTools.
  // mainWindow.webContents.openDevTools({mode: 'detach'})
}

// 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 () {
  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.
ipcMain.handle('getSources', () => {
  return desktopCapturer.getSources({ types: ['screen'] })
})

ipcMain.handle('openSecondWindow', ()=>{
  secondWindow = new BrowserWindow({
    width: 800,
    height: 600,
  })
  secondWindow.setContentProtection(true)
  secondWindow.loadURL('http://www.google.com')
})

## package.json
{
  "name": "electronScreenShareDemo",
  "productName": "electronScreenShareDemo",
  "description": "My Electron application description",
  "keywords": [],
  "main": "./main.js",
  "version": "1.0.0",
  "author": "kuncui",
  "scripts": {
    "start": "electron ."
  },
  "devDependencies": {
    "electron": "^28.2.1"
  }
}

## preload.js
// All of the Node.js APIs are available in the preload process.
// It has the same sandbox as a Chrome extension.
const { contextBridge, ipcRenderer } = require('electron')
contextBridge.exposeInMainWorld(
  'desktopCapturer',
  {
    getSources: () => ipcRenderer.invoke('getSources'),
    openSecondWindow: () => ipcRenderer.invoke('openSecondWindow')
  }
)
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
// This file is required by the index.html file and will
// be executed in the renderer process for that window.
// No Node.js APIs are available in this process because
// `nodeIntegration` is turned off. Use `preload.js` to
// selectively enable features needed in the rendering
// process.
const vid = document.getElementById('vid')
vid.onloadedmetadata = (e) => vid.play()
function handleError (e) {
  console.log(e)
}
const setVidSrc = async () => {
    try{
        const sources = await window.desktopCapturer.getSources()
        const media = await navigator.mediaDevices.getUserMedia({
            audio: false,
            video: {
                mandatory: {
                    chromeMediaSource: 'desktop',
                    chromeMediaSourceId: sources[0].id
                }
            }
        })
        vid.srcObject = media
        window.desktopCapturer.openSecondWindow()
    }catch(ex){
        handleError(ex)
    }
}
setVidSrc()
	<!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'; style-src 'self' 'unsafe-inline'">
	<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>.
	<video id="vid" />
	<!-- 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, ipcMain, desktopCapturer } = require('electron')
	const path = require('path')
	app.commandLine.appendSwitch('disable-features', 'IOSurfaceCapturer,DesktopCaptureMacV2')
	/* This line causes screen share to fail
	If you uncomment the line it will work but not hide the second window */
	app.commandLine.appendSwitch('enable-features', 'ScreenCaptureKitMac');
	let secondWindow
	function createWindow() {
	// Create the browser window.
	const mainWindow = new BrowserWindow({
	width: 800,
	height: 600,
	webPreferences: {
	preload: path.join(__dirname, 'preload.js'),
	}
	})
	mainWindow.setContentProtection(true)
	// and load the index.html of the app.
	mainWindow.loadFile('index.html')
	// Open the DevTools.
	// mainWindow.webContents.openDevTools({mode: 'detach'})
	}

	// 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 () {
	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.
	ipcMain.handle('getSources', () => {
	return desktopCapturer.getSources({ types: ['screen'] })
	})

	ipcMain.handle('openSecondWindow', ()=>{
	secondWindow = new BrowserWindow({
	width: 800,
	height: 600,
	})
	secondWindow.setContentProtection(true)
	secondWindow.loadURL('http://www.google.com')
	})
	{
	"name": "electronScreenShareDemo",
	"productName": "electronScreenShareDemo",
	"description": "My Electron application description",
	"keywords": [],
	"main": "./main.js",
	"version": "1.0.0",
	"author": "kuncui",
	"scripts": {
	"start": "electron ."
	},
	"devDependencies": {
	"electron": "^28.2.1"
	}
	}
	// All of the Node.js APIs are available in the preload process.
	// It has the same sandbox as a Chrome extension.
	const { contextBridge, ipcRenderer } = require('electron')
	contextBridge.exposeInMainWorld(
	'desktopCapturer',
	{
	getSources: () => ipcRenderer.invoke('getSources'),
	openSecondWindow: () => ipcRenderer.invoke('openSecondWindow')
	}
	)
	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])
	}
	})
	// This file is required by the index.html file and will
	// be executed in the renderer process for that window.
	// No Node.js APIs are available in this process because
	// `nodeIntegration` is turned off. Use `preload.js` to
	// selectively enable features needed in the rendering
	// process.
	const vid = document.getElementById('vid')
	vid.onloadedmetadata = (e) => vid.play()
	function handleError (e) {
	console.log(e)
	}
	const setVidSrc = async () => {
	try{
	const sources = await window.desktopCapturer.getSources()
	const media = await navigator.mediaDevices.getUserMedia({
	audio: false,
	video: {
	mandatory: {
	chromeMediaSource: 'desktop',
	chromeMediaSourceId: sources[0].id
	}
	}
	})
	vid.srcObject = media
	window.desktopCapturer.openSecondWindow()
	}catch(ex){
	handleError(ex)
	}
	}
	setVidSrc()