Electron main.js file

main.js

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

// 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 win;

/**
 * @name createWindow
 * @return {undefined}
 */
function createWindow() {
  // Create the browser window.
  win = new BrowserWindow({
    width: 800,
    height: 600
  });

  const startUrl = process.env.ELECTRON_START_URL || url.format({
    pathname: path.join(__dirname, '/../build/index.html'),
    protocol: 'file:',
    slashes: true
  });
  win.loadURL(startUrl);

  // Emitted when the window is closed.
  win.on('closed', () => {
    win = null;
  });
}

app.on('ready', createWindow);

// Quit when all windows are closed.
app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') {
    app.quit();
  }
});

app.on('activate', () => {
  if (win === null) {
    createWindow();
  }
});