electron.js

// Dependencies
const electron = require('electron');
const app = electron.app;
const BrowserWindow = electron.BrowserWindow;
const Menu = electron.Menu;

const path = require('path');
const isDev = require('electron-is-dev');

var mainWindow;

// Create the Main window that loads the web app.
function createWindow() {
  var menu;

  mainWindow = new BrowserWindow({width: 1280, height: 768, minWidth: 1024, minHeight: 768, frame: true});

  mainWindow.loadURL(isDev
    ? 'http://localhost:8082'
    : `file://${path.join(__dirname, '/index.html')}`);

  mainWindow.on('closed', () => {
    // 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;
    // Quit the app when main window is closed
    app.quit();
  });

  // Show window when it first loads.
  mainWindow
    .webContents
    .once('did-finish-load', () => {
      mainWindow.show();

      // Open developer tools.
      if (isDev) {
        mainWindow
          .webContents
          .openDevTools();
      }
    });

  // This is implmented to fix the copy paste issue in electron app for mac
  // reference: https://pracucci.com/atom-electron-enable-copy-and-paste.html
  menu = Menu.buildFromTemplate([
    {
      label: 'Application',
      submenu: [
        {
          label: 'Quit',
          accelerator: 'Command+Q',
          click: function () {
            app.quit();
          }
        }
      ]
    }, {
      label: 'Edit',
      submenu: [
        {
          label: 'Copy',
          accelerator: 'CmdOrCtrl+C',
          selector: 'copy:'
        }, {
          label: 'Paste',
          accelerator: 'CmdOrCtrl+V',
          selector: 'paste:'
        }, {
          label: 'Select All',
          accelerator: 'CmdOrCtrl+A',
          selector: 'selectAll:'
        }
      ]
    }
  ]);

  Menu.setApplicationMenu(menu);

}

// 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', () => {
  app.quit();
});

app.on('activate', () => {
  // TODO: Recreate or show?
  if (mainWindow === null) {
    createWindow();
  } else {
    mainWindow.show();
  }
});