Atom Electron - Close the window with javascript

I have declarate my Window:

const electron = require('electron')
const path = require('path')
const BrowserWindow = electron.remote.BrowserWindow

const notifyBtn = document.getElementById('notifyBtn')

notifyBtn.addEventListener('click',function(event){

    const modalPath = path.join('file://', __dirname,'add.html')
    let win = new BrowserWindow({ webPreferences: {nodeIntegration: true}, frame: false, transparent: true, alwaysOnTop:true, width: 400, height: 200 })
    win.on('close',function(){win = null})
    win.loadURL(modalPath)
    win.show()

})

and for close this:

const electron = require('electron')
const path = require('path')
const remote = electron.remote

const closeBtn = document.getElementById('closeBtn')

closeBtn.addEventListener('click', function (event) {
    var window = remote.getCurrentWindow();
    window.close();
})

You must access the BrowserWindow object created by your main process and call the minimize, maximize, and close methods on that. You can access this using the remote module. Here is an example of binding all three buttons:

  const remote = require('electron').remote;

  document.getElementById("min-btn").addEventListener("click", function (e) {
       var window = remote.getCurrentWindow();
       window.minimize(); 
  });

  document.getElementById("max-btn").addEventListener("click", function (e) {
       var window = remote.getCurrentWindow();
       if (!window.isMaximized()) {
           window.maximize();          
       } else {
           window.unmaximize();
       }
  });

  document.getElementById("close-btn").addEventListener("click", function (e) {
       var window = remote.getCurrentWindow();
       window.close();
  }); 

assuming your min, max, close buttons have ids of min-btn, max-btn, and close-btn, respectively.

You can view the full documentation for the BrowserWindow along with other functionality you might need here: http://electron.atom.io/docs/v0.28.0/api/browser-window/.

It might also help you to take a look at a tutorial I wrote about building a chromeless window that looks like Visual Studio here: http://www.mylifeforthecode.com/making-the-electron-shell-as-pretty-as-the-visual-studio-shell. Your question is covered along with some css to properly position the buttons.