newbornfrontender · January 18, 2019 13:46
diff --git a/index.html b/index.html
 <!doctype html>

 <html>
  <head>
    <meta charset="utf-8">
    <title>Web-components and electron</title>

    <style>
      my-app::part(title) {
        color: cyan;
      }
    </style>
  </head>

  <body>
    <my-app></my-app>

    <script>
      require('./renderer.js');
    </script>
  </body>
 </html>
diff --git a/main.js b/main.js
 // Modules to control application life and create native browser window
 const {app, BrowserWindow} = require('electron')

 // Keep a global reference of the window object, if you don't, the window will
 // be closed automatically when the JavaScript object is garbage collected.
 let mainWindow

 function createWindow () {
  // Create the browser window.
  mainWindow = new BrowserWindow({width: 800, height: 600})

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

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

  // Emitted when the window is closed.
  mainWindow.on('closed', function () {
    // Dereference the window object, usually you would store windows
    // in an array if your app supports multi windows, this is the time
    // when you should delete the corresponding element.
    mainWindow = null
  })
 }

 // https://electronjs.org/docs/api/chrome-command-line-switches
 // Enable CSS Shadow Parts
 app.commandLine.appendSwitch('enable-blink-features', 'CSSPartPseudoElement')

 // 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.on('ready', createWindow)

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

 app.on('activate', function () {
  // On OS X 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 (mainWindow === null) {
    createWindow()
  }
 })

 // 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.
diff --git a/renderer.js b/renderer.js
 class MyApp extends HTMLElement {
  constructor() {
    super();

    this.attachShadow({ mode:'open' });
    this.shadowRoot.innerHTML = `
      <style>
        h1 {
          color: red;
        }
      </style>

      <h1 part="title">Hello</h1>
    `;
  };
 };

 customElements.define('my-app', MyApp);
	<!doctype html>

	<html>
	<head>
	<meta charset="utf-8">
	<title>Web-components and electron</title>

	<style>
	my-app::part(title) {
	color: cyan;
	}
	</style>
	</head>

	<body>
	<my-app></my-app>

	<script>
	require('./renderer.js');
	</script>
	</body>
	</html>
	// Modules to control application life and create native browser window
	const {app, BrowserWindow} = require('electron')

	// Keep a global reference of the window object, if you don't, the window will
	// be closed automatically when the JavaScript object is garbage collected.
	let mainWindow

	function createWindow () {
	// Create the browser window.
	mainWindow = new BrowserWindow({width: 800, height: 600})

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

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

	// Emitted when the window is closed.
	mainWindow.on('closed', function () {
	// Dereference the window object, usually you would store windows
	// in an array if your app supports multi windows, this is the time
	// when you should delete the corresponding element.
	mainWindow = null
	})
	}

	// https://electronjs.org/docs/api/chrome-command-line-switches
	// Enable CSS Shadow Parts
	app.commandLine.appendSwitch('enable-blink-features', 'CSSPartPseudoElement')

	// 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.on('ready', createWindow)

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

	app.on('activate', function () {
	// On OS X 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 (mainWindow === null) {
	createWindow()
	}
	})

	// 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.
	class MyApp extends HTMLElement {
	constructor() {
	super();

	this.attachShadow({ mode:'open' });
	this.shadowRoot.innerHTML = `
	<style>
	h1 {
	color: red;
	}
	</style>

	<h1 part="title">Hello</h1>
	`;
	};
	};

	customElements.define('my-app', MyApp);