main.js

const { app, BrowserWindow, Menu , ipcMain, dialog} = require('electron');
// Module to control application life.

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 mainWindow;

function createWindow() {
  // Create the browser window.
  mainWindow = new BrowserWindow({
    width: 600,
    height: 900,
    // https://github.com/electron/electron/issues/17241
    webPreferences: {
      nodeIntegration: true,
      contextIsolation: false,
      enableRemoteModule: true,
    },
  });

  // and load the index.html of the app.
  mainWindow.loadURL(
    url.format({
      pathname: path.join(__dirname, 'index.html'),
      protocol: 'file:',
      slashes: true,
    })
  );

  // 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;
  });

  // menu
  var template = [
    {
      label: 'Application',
      submenu: [
        { label: 'About Application', selector: 'orderFrontStandardAboutPanel:' },
        { type: 'separator' },
        {
          label: 'Quit',
          accelerator: 'Command+Q',
          click: function () {
            app.quit();
          },
        },
      ],
    },
    {
      label: 'Edit',
      submenu: [
        { label: 'Undo', accelerator: 'CmdOrCtrl+Z', selector: 'undo:' },
        { label: 'Redo', accelerator: 'Shift+CmdOrCtrl+Z', selector: 'redo:' },
        { type: 'separator' },
        { label: 'Cut', accelerator: 'CmdOrCtrl+X', selector: 'cut:' },
        { label: 'Copy', accelerator: 'CmdOrCtrl+C', selector: 'copy:' },
        { label: 'Paste', accelerator: 'CmdOrCtrl+V', selector: 'paste:' },
        { role: 'pasteandmatchstyle' },
        { role: 'delete' },
        { label: 'Select All', accelerator: 'CmdOrCtrl+A', selector: 'selectAll:' },
        { type: 'separator' },
        {
          label: 'Speech',
          submenu: [
            { role: 'startspeaking' }, //perhaps add keyboard shortcut?
            { role: 'stopspeaking' }, //perhaps add keyboard shortcut?
          ],
        },
      ],
    },
    {
      label: 'View',
      submenu: [
        { role: 'reload' },
        { role: 'forcereload' },
        { role: 'toggledevtools', accelerator: 'CmdOrCtrl+Alt+I' },
        { type: 'separator' },
        { role: 'resetzoom' },
        { role: 'zoomin' },
        { role: 'zoomout' },
        { type: 'separator' },
        { role: 'togglefullscreen' },
      ],
    },
    {
      role: 'window',
      submenu: [
        { role: 'minimize' },
        { role: 'close' },
        { type: 'separator' },
        {
          label: 'New main window',
          click() {
            createWindow();
          },
          accelerator: 'CmdOrCtrl+N',
        },
      ],
    },
    {
      role: 'help',
      submenu: [
        {
          label: 'Project Page',
          click() {
            require('electron').shell.openExternal('https://github.com/pietrop/electron-video-downloader');
          },
        },
        {
          label: 'Raise an issue',
          click() {
            require('electron').shell.openExternal('https://github.com/pietrop/electron-video-downloader/issues');
          },
        },
      ],
    },
  ];

  Menu.setApplicationMenu(Menu.buildFromTemplate(template));
}

// 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();
  }
});

ipcMain.on('selectDirectory', async function(event, arg) {
     const result = await dialog.showOpenDialog({
        properties: ['openDirectory']
    })

    if(!result.canceled){
      event.returnValue = result.filePaths[0]
    }
  
});

// 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.