main.js

const electron = require('electron')
// Module to control application life.
const app = electron.app
// Module to create native browser window.
const BrowserWindow = electron.BrowserWindow
const remote = electron.remote
const Menu = electron.Menu


const path = require('path')
const url = require('url')

const open = require('open')

const ipcMain = electron.ipcMain

// 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

// Electron reload on file changes
require('electron-reload')(__dirname, {
  electron: path.join(__dirname, 'node_modules', '.bin', 'electron'),
  hardResetMethod: 'exit'
});

function createWindow () {
  // Create the browser window.
  mainWindow = new BrowserWindow({
    width: 550,
    height: 400,
    resizable: false,
    preload: __dirname + '/js/prompt.js',
    backgroundColor: '#230836'
  })
  mainWindow.setTitle(require('./package.json').name)
  // and load the index.html of the app.
  mainWindow.loadURL(url.format({
    pathname: path.join(__dirname, 'app/index.html'),
    protocol: 'file:',
    slashes: true
  }))

  // 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
  })

  mainWindow.webContents.on('new-window', function(event, url){
    event.preventDefault();
    open(url);
  });

  // Credits : https://github.com/electron/electron-quick-start/compare/master...konsumer:master
  var promptResponse
  ipcMain.on('prompt', function(eventRet, arg) {
    promptResponse = null
    var promptWindow = new BrowserWindow({
      width: 200,
      height: 100,
      show: false,
      resizable: false,
      movable: false,
      alwaysOnTop: true,
      frame: false
    })
    arg.val = arg.val || ''
    const promptHtml = '<label for="val">' + arg.title + '</label>\
    <input id="val" value="' + arg.val + '" autofocus />\
    <button id="ok-button" onclick="require(\'electron\').ipcRenderer.send(\'prompt-response\', document.getElementById(\'val\').value);window.close()">Ok</button>\
    <style>body {font-family: sans-serif;} button {float:right; margin-left: 10px;} label,input {margin-bottom: 10px; width: 100%; display:block;}</style>\
    <script>document.getElementById(\'val\').addEventListener(\'keydown\', function(e){if(e.which==13)(document.getElementById(\'ok-button\').click())})</script>'
    promptWindow.loadURL('data:text/html,' + promptHtml)
    promptWindow.show()
    promptWindow.on('closed', function() {
      eventRet.returnValue = promptResponse
      promptWindow = null
    })
  })
  ipcMain.on('prompt-response', function(event, arg) {
    if (arg === ''){ arg = null }
    promptResponse = arg
  })



}

// 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()
  }
})

app.setName('Muriel')
// 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.