terry2010/hidden.html

## hidden.html
<!DOCTYPE html>
<html lang="en">
<head>
  <title>hidden</title>
</head>
<body>
  <h1>IPC Example</h1>
  <p>hidden window</p>

  <script>
const { ipcRenderer } = require('electron')

   // ipcRenderer.send('test-message', 'papapa')

  </script>
</body>
</html>

## index.html
<!DOCTYPE html>
<html lang="en">
<head>
  <title>IPC Example</title>
</head>
<body>
  <h1>IPC Example</h1>
    <button onclick="fullscreen(true)">click me to set fullscreen</button>   |
    <button onclick="fullscreen(false)">click me to cancel fullscreen</button>

  <p>main window</p>
  <button onclick="send()">click me to test IPC</button>
  <pre>
  <script>
const { ipcRenderer } = require('electron')
function send() {
    ipcRenderer.send('test-message', 'papapa')
}

function fullscreen(iff) {
   ipcRenderer.send('action-message', {act:'fullscreen',value:iff})
}

  </script>
</body>
</html>

## main.js
// The ipcMain and ipcRenderer modules allow communication between the mai
// process and the renderer processes.
//
// For more info, see:
// https://electronjs.org/docs/api/ipc-main
// https://electronjs.org/docs/api/ipc-renderer

const { app, BrowserWindow, ipcMain } = require('electron')
const path = require('path')
var mainWindow
app.whenReady().then(() => {
   mainWindow = new BrowserWindow({
    height: 800,
    width: 1000,
    webPreferences: {
      nodeIntegration: true, // default in Electron >= 5
      contextIsolation: false, // default in Electron >= 12
    }
  })

 let hiddenWindowID = 1

  ipcMain.on('test-message', (event, arg) => {
    console.log(arg) // prints "ping"
     var hiddenWindow = new BrowserWindow({
    height: 600,
    width: 600,
    webPreferences: {
      nodeIntegration: true,
      enableRemoteModule: true,
      contextIsolation: false,
      webSecurity: false,
      preload: path.join(__dirname, 'preload.js'),
    },
    fullscreen:undefined,
    simpleFullscreen:true,
    transparent: true,
    frame: false,
    movable: false,
    resizable: false,
    enableLargerThanScreen: true,
    hasShadow: false,
    title: "hiddenWindow",
    show: false,
    roundedCorners: false
  })
    hiddenWindow.loadFile('hidden.html')
    setTimeout(()=>{
      console.log('send hidden-message2')
      hiddenWindow.webContents.send('hidden-message2','msg2')
    },3000)
  })

  ipcMain.on('hidden-message', (event, arg) => {
    console.log(arg)

    mainWindow.webContents.executeJavaScript(`

    document.body.append("`+arg+`")

    `).catch(e=>{
      console.log(e)
    })

  })


  ipcMain.on('action-message', (event, arg) => {
    if(arg.act === 'fullscreen' ) {

      mainWindow.setSimpleFullScreen(arg.value)
    }
  })


  mainWindow.loadFile('index.html')
  mainWindow.on('close',()=>{
    app.exit(0)
  })
})

## package.json
{
  "name": "didactic-anxiety-intensify-ocsqg",
  "productName": "didactic-anxiety-intensify-ocsqg",
  "description": "My Electron application description",
  "keywords": [],
  "main": "./main.js",
  "version": "1.0.0",
  "author": "terry",
  "scripts": {
    "start": "electron ."
  },
  "dependencies": {},
  "devDependencies": {
    "electron": "19.0.6"
  }
}

## preload.js
const { ipcRenderer } = require('electron')

// prints "pong"

  ipcRenderer.send('hidden-message', '  hiddenWindow-ping-1')


setTimeout( ()=>{
ipcRenderer.send('hidden-message', '  hiddenWindow-ping-2')
},1000)

ipcRenderer.on('hidden-message2',()=>{
  ipcRenderer.send('hidden-message', '  hiddenWindow-ping-3')
},1000)
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<title>hidden</title>
	</head>
	<body>
	<h1>IPC Example</h1>
	<p>hidden window</p>

	<script>
	const { ipcRenderer } = require('electron')

	// ipcRenderer.send('test-message', 'papapa')

	</script>
	</body>
	</html>
	// The ipcMain and ipcRenderer modules allow communication between the mai
	// process and the renderer processes.
	//
	// For more info, see:
	// https://electronjs.org/docs/api/ipc-main
	// https://electronjs.org/docs/api/ipc-renderer

	const { app, BrowserWindow, ipcMain } = require('electron')
	const path = require('path')
	var mainWindow
	app.whenReady().then(() => {
	mainWindow = new BrowserWindow({
	height: 800,
	width: 1000,
	webPreferences: {
	nodeIntegration: true, // default in Electron >= 5
	contextIsolation: false, // default in Electron >= 12
	}
	})

	let hiddenWindowID = 1

	ipcMain.on('test-message', (event, arg) => {
	console.log(arg) // prints "ping"
	var hiddenWindow = new BrowserWindow({
	height: 600,
	width: 600,
	webPreferences: {
	nodeIntegration: true,
	enableRemoteModule: true,
	contextIsolation: false,
	webSecurity: false,
	preload: path.join(__dirname, 'preload.js'),
	},
	fullscreen:undefined,
	simpleFullscreen:true,
	transparent: true,
	frame: false,
	movable: false,
	resizable: false,
	enableLargerThanScreen: true,
	hasShadow: false,
	title: "hiddenWindow",
	show: false,
	roundedCorners: false
	})
	hiddenWindow.loadFile('hidden.html')
	setTimeout(()=>{
	console.log('send hidden-message2')
	hiddenWindow.webContents.send('hidden-message2','msg2')
	},3000)
	})

	ipcMain.on('hidden-message', (event, arg) => {
	console.log(arg)

	mainWindow.webContents.executeJavaScript(`

	document.body.append("`+arg+`")

	`).catch(e=>{
	console.log(e)
	})

	})


	ipcMain.on('action-message', (event, arg) => {
	if(arg.act === 'fullscreen' ) {

	mainWindow.setSimpleFullScreen(arg.value)
	}
	})


	mainWindow.loadFile('index.html')
	mainWindow.on('close',()=>{
	app.exit(0)
	})
	})
	{
	"name": "didactic-anxiety-intensify-ocsqg",
	"productName": "didactic-anxiety-intensify-ocsqg",
	"description": "My Electron application description",
	"keywords": [],
	"main": "./main.js",
	"version": "1.0.0",
	"author": "terry",
	"scripts": {
	"start": "electron ."
	},
	"dependencies": {},
	"devDependencies": {
	"electron": "19.0.6"
	}
	}
	const { ipcRenderer } = require('electron')

	// prints "pong"

	ipcRenderer.send('hidden-message', ' hiddenWindow-ping-1')


	setTimeout( ()=>{
	ipcRenderer.send('hidden-message', ' hiddenWindow-ping-2')
	},1000)

	ipcRenderer.on('hidden-message2',()=>{
	ipcRenderer.send('hidden-message', ' hiddenWindow-ping-3')
	},1000)