main.js

const { app, BrowserWindow } = require('electron')
const path = require('path')
const url = require('url')
let win

function createWindow() {
    // Create the browser window.
    win = new BrowserWindow({ width:1000, height: 1000 })

    // and load the index.html of the app.
    win.loadURL(url.format({
        pathname: path.join(__dirname, 'one.html'),
        protocol: 'file:',
        slashes: true,
    })
    )
    win.on('close', () => {
        win = null
    })
    win.webContents.openDevTools()

    win.on('closed', () => {
        win = null
    })
}
app.on('ready', createWindow)