ckerr/index.html

## index.html
<!DOCTYPE html>
<html>
<body>
    <iframe src="http://www.orf.at"/>
</body>
<script>
</script>
</html>

## main.js
const electron = require("electron");
function init() {
	let browserWindow3 = new electron.BrowserWindow({
		show: true,
		x: 500,
		y: 100,
		width: 900,
		height: 900,
		webPreferences: {
			partition: "persist:test1"
		}
	});
	let browserWindow2 = new electron.BrowserWindow({
		show: true,
		x: 500,
		y: 100,
		width: 900,
		height: 900,
		webPreferences: {
			partition: "persist:test2"
		}
	});
	browserWindow2.webContents.loadURL("http://www.google.com")
	browserWindow3.webContents.loadURL("http://localhost:9000/index.html").then(() => {
		setTimeout(() => {
			console.log("calling print to pdf");

			// Comment out this one to make the other one work
			browserWindow3.webContents.printToPDF({
			}).then(() => {
				console.log("done 1");
			})

			setTimeout(() => {
				browserWindow2.webContents.printToPDF({
				}).then(() => {
					console.log("done 2");
				})
			}, 2000);
		}, 2000);
	});
}
electron.app.on("ready", () => {
	init();
});


## package.json
{
  "name": "electron-quick-start",
  "version": "1.0.0",
  "description": "A minimal Electron application",
  "main": "main.js",
  "scripts": {
    "start": "electron ."
  },
  "repository": "https://github.com/electron/electron-quick-start",
  "keywords": [
    "Electron",
    "quick",
    "start",
    "tutorial",
    "demo"
  ],
  "author": "GitHub",
  "license": "CC0-1.0",
  "devDependencies": {
    "electron": "^11.2.2"
  }
}

## 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
// 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.
	<!DOCTYPE html>
	<html>
	<body>
	<iframe src="http://www.orf.at"/>
	</body>
	<script>
	</script>
	</html>
	const electron = require("electron");
	function init() {
	let browserWindow3 = new electron.BrowserWindow({
	show: true,
	x: 500,
	y: 100,
	width: 900,
	height: 900,
	webPreferences: {
	partition: "persist:test1"
	}
	});
	let browserWindow2 = new electron.BrowserWindow({
	show: true,
	x: 500,
	y: 100,
	width: 900,
	height: 900,
	webPreferences: {
	partition: "persist:test2"
	}
	});
	browserWindow2.webContents.loadURL("http://www.google.com")
	browserWindow3.webContents.loadURL("http://localhost:9000/index.html").then(() => {
	setTimeout(() => {
	console.log("calling print to pdf");

	// Comment out this one to make the other one work
	browserWindow3.webContents.printToPDF({
	}).then(() => {
	console.log("done 1");
	})

	setTimeout(() => {
	browserWindow2.webContents.printToPDF({
	}).then(() => {
	console.log("done 2");
	})
	}, 2000);
	}, 2000);
	});
	}
	electron.app.on("ready", () => {
	init();
	});
	{
	"name": "electron-quick-start",
	"version": "1.0.0",
	"description": "A minimal Electron application",
	"main": "main.js",
	"scripts": {
	"start": "electron ."
	},
	"repository": "https://github.com/electron/electron-quick-start",
	"keywords": [
	"Electron",
	"quick",
	"start",
	"tutorial",
	"demo"
	],
	"author": "GitHub",
	"license": "CC0-1.0",
	"devDependencies": {
	"electron": "^11.2.2"
	}
	}
	// 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])
	}
	})
	// 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.