Client development (Electron) awareness window 2

Posted by chadrt on Mon, 07 Feb 2022 21:27:34 +0100

Dear, Hello, I'm "front-end Xiaoxin", 😇 He has been engaged in front-end development and Android development for a long time, is keen on technology, and goes farther and farther on the road of programming

Electron is a framework for building desktop applications using JavaScript, HTML, and CSS. Embed Chromium and node JS to binary electron allows you to maintain a JavaScript code base and create cross platform applications macOS and Linux running on Windows - no local development experience is required.

How to create a non rectangular window:

Adjust main process code

  1. Adjust the width and height of the window to be consistent, so that the window becomes square;
  2. Adjust the window to be transparent, and the effect is shown in the figure below;

  3. Keep the frame attribute false, and still define the border and title bar by ourselves;
  4. Generally, such windows do not need to support window size adjustment. We set the attribute resizable to false;
  5. Then we disable the window maximization attribute.
  6. The complete code is as follows:

    const win = new BrowserWindow({
        width: 380,
        height: 380,
        transparent: true,
        frame: false,
        resizable: false,
        maximizable: false,
        show: false,
        webPreferences: {
          // Use pluginOptions.nodeIntegration, leave this alone
          // See for more info
          // nodeIntegration: process.env.ELECTRON_NODE_INTEGRATION,
          // contextIsolation: !process.env.ELECTRON_NODE_INTEGRATION
          nodeIntegration: true,
          contextIsolation: false,
          enableRemoteModule: true

    Adjust the rendering process code:

  7. Adjust the root component style to make it circular:

    body {
      margin: 0px;
      padding: 0px;
      pointer-events: none;
    #app {
      box-sizing: border-box;
      width: 380px;
      height: 380px;
      border-radius: 190px;
      border: 1px solid green;
      background: #fff;
      overflow: hidden;
      pointer-events: auto;
      text-align: center;
  • Now the effect is shown in the figure below. The color of the four corners is the color of the wallpaper on the desktop.

  1. At this time, we just look like a circle, but the events triggered by the four corners are still in the window. We need to click through;
  2. Use API: win Setignoremouseevents to dynamically set whether to ignore mouse events;

    window.addEventListener('mousemove', event => {
      const flag = === document.documentElement
      if (flag) {
     win.setIgnoreMouseEvents(true, { forward: true })
      } else {
    win.setIgnoreMouseEvents(true, { forward: true })

    Other controls of the window:

  3. Rewrite the processing of window closing (close after confirmation):

    window.onbeforeunload = function () {
      const { dialog } = remote
      dialog.showMessageBox(win, {
        type: 'warning',
        title: 'Leave this site?',
        message: 'Your changes may not be saved.',
        buttons: ['leave', 'cancel']
        .then((res) => {
        if (res.response === 0) {
      return false

  4. Open a modal window. We can continue to operate in the original window only after closing the newly opened module window, which is the same as modal Dialog; = new remote.BrowserWindow({
      parent: remote.getCurrentWindow(),
      modal: true,
      webPreferences: {
        nodeIntegration: true


Let's introduce so much about the window of Electron first. The next chapter will open the learning of relevant contents of the interface.

Welcome to my official account, "front-end little Xin", and push the original technical article for the first time.

Topics: Front-end Electron