ckerr/gronk.js

## gronk.js
console.log('hello world!');

## 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'">
    <meta http-equiv="X-Content-Security-Policy" content="default-src 'self'; script-src 'self'">
    <title>Hello World!</title>
  </head>
  <body>
    <h1>Hello World!</h1>

    <!-- 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, crashReporter, ipcMain, BrowserWindow} = require('electron')
const path = require('path')

function createWindow () {
  // Create the browser window.
  const mainWindow = new BrowserWindow({
    webPreferences: {
      contextIsolation: true,
      preload: path.join(__dirname, "preload.js"),
    }
  })
  mainWindow.loadFile('index.html');
}

// 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()
})


function testDone(success, ...logs) {
  console.log(`test ${success ? 'passed' : 'failed'}`)
  logs.forEach((i) => console.log(i))
  process.exit(success ? 0 : 1)
}

{
  crashReporter.start({ uploadToServer: false, submitURL: '' })
  ipcMain.on('test-done', (_, success, ...logs) => testDone(success, ...logs))
  const failIfBadExit = (details) => {
    if (details.reason !== 'clean-exit') testDone(false, new Error('trace'), details)
  }
  app.on('child-process-gone', (_ev, details) => test.failIfBadExit(details))
  app.on('render-process-gone', (_ev, _, details) => test.failIfBadExit(details))
}

## 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, webFrame } = require('electron');

// Test helpers
const test = {
  assert: (ok, ...logs) => {
    if (!ok) test.fail(...logs)
  },
  fail: (...logs) => test.done(false, ...logs),
  done: (success = true, ...logs) => {
    if (!success) logs.unshift(new Error('test failed'))
    ipcRenderer.send('test-done', success, ...logs)
  },
  isWordMisspelled: (str) => webFrame.isWordMisspelled(str),
};

contextBridge.exposeInMainWorld('test', test);


// Example test: check that process.versions.electron
// - is defined in the preload process
// - has major, minor, and patch numbers
// - the numbers are non-negative
try {
  const ver = process.versions.electron
  const tokens = process.versions.electron.split('.', 3)
  test.assert(tokens.length === 3)
  for (const token of tokens) {
    const num = Number.parseInt(token)
    test.assert(num !== NaN)
    test.assert(num >= 0)
  }
} catch (err) {
  test.fail(err)
}

## 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.

let element = document.createElement('textarea');
element.spellcheck = true;
element.value = 'testt';
document.body.appendChild(element);
element.focus();

setTimeout(() => {
  try {
    window.test.assert(window.test.isWordMisspelled('testt'))
    window.test.done()
  } catch(err) {
    test.fail(err);
  }
}, 1000);
	<!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'">
	<meta http-equiv="X-Content-Security-Policy" content="default-src 'self'; script-src 'self'">
	<title>Hello World!</title>
	</head>
	<body>
	<h1>Hello World!</h1>

	<!-- 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, crashReporter, ipcMain, BrowserWindow} = require('electron')
	const path = require('path')

	function createWindow () {
	// Create the browser window.
	const mainWindow = new BrowserWindow({
	webPreferences: {
	contextIsolation: true,
	preload: path.join(__dirname, "preload.js"),
	}
	})
	mainWindow.loadFile('index.html');
	}

	// 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()
	})


	function testDone(success, ...logs) {
	console.log(`test ${success ? 'passed' : 'failed'}`)
	logs.forEach((i) => console.log(i))
	process.exit(success ? 0 : 1)
	}

	{
	crashReporter.start({ uploadToServer: false, submitURL: '' })
	ipcMain.on('test-done', (_, success, ...logs) => testDone(success, ...logs))
	const failIfBadExit = (details) => {
	if (details.reason !== 'clean-exit') testDone(false, new Error('trace'), details)
	}
	app.on('child-process-gone', (_ev, details) => test.failIfBadExit(details))
	app.on('render-process-gone', (_ev, _, details) => test.failIfBadExit(details))
	}
	// All of the Node.js APIs are available in the preload process.
	// It has the same sandbox as a Chrome extension.
	const { contextBridge, ipcRenderer, webFrame } = require('electron');

	// Test helpers
	const test = {
	assert: (ok, ...logs) => {
	if (!ok) test.fail(...logs)
	},
	fail: (...logs) => test.done(false, ...logs),
	done: (success = true, ...logs) => {
	if (!success) logs.unshift(new Error('test failed'))
	ipcRenderer.send('test-done', success, ...logs)
	},
	isWordMisspelled: (str) => webFrame.isWordMisspelled(str),
	};

	contextBridge.exposeInMainWorld('test', test);


	// Example test: check that process.versions.electron
	// - is defined in the preload process
	// - has major, minor, and patch numbers
	// - the numbers are non-negative
	try {
	const ver = process.versions.electron
	const tokens = process.versions.electron.split('.', 3)
	test.assert(tokens.length === 3)
	for (const token of tokens) {
	const num = Number.parseInt(token)
	test.assert(num !== NaN)
	test.assert(num >= 0)
	}
	} catch (err) {
	test.fail(err)
	}
	// 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.

	let element = document.createElement('textarea');
	element.spellcheck = true;
	element.value = 'testt';
	document.body.appendChild(element);
	element.focus();

	setTimeout(() => {
	try {
	window.test.assert(window.test.isWordMisspelled('testt'))
	window.test.done()
	} catch(err) {
	test.fail(err);
	}
	}, 1000);