X11 xorg Electron App cant open in fullscreen

Question

We have an electron app running on X11 without a Window Manager -> directly on the XServer.

We can't get electron to get in fullscreen!

main.js

const { app, BrowserWindow } = require('electron')

let win;

function createWindow () {
    // Create the browser window.
    win = new BrowserWindow({
        width: 400,
        height: 300,
        backgroundColor: '#ffffff',
        fullscreen:true,
        "web-preferences": { "web-security": false }
        //icon: `file://${__dirname}/dist/assets/logo.png`
    })


    win.loadFile(`app/index.html`)

    //// uncomment below to open the DevTools.
    win.webContents.openDevTools()

    // Event when the window is closed.
    win.on('closed', function () {
        win = null
    })
}

// Create window on electron intialization
app.on('ready', createWindow)

We also tried using setFullscreen, nothing works.

The xserver uses the whole screen, so there's no problem with it. Chromium started in fullscreen - no problems.

If we start Electron with an Window Manager, we can press F11 afterwards to make it full size but still doesn't work programmaticly

We tried:

• Setting the width and height with the resolution from the screen itself in the BrowserWindow Constructor.
• Setting Kiosk with .setKiosk(true) and in options kiosk: true
• Setting Fullscreen with .setFullscreen(true) and fullscreen: true

Answer 1

The Problem was the app wasn't run from electron itself, my script started the index.html file, not the app!