How to push notifications with angular.js?

Since you're on the MEAN stack, the standard recommendation in Node would be to use the Socket.IO API.

They provide the following example of two way messaging (which would facilitate your push messages very easily):

Client

<script src="/socket.io/socket.io.js"></script><script>  var socket = io.connect('http://localhost');  socket.on('news', function (data) {    console.log(data);    socket.emit('my other event', { my: 'data' });  });</script>

Server

var app = require('http').createServer(handler)  , io = require('socket.io').listen(app)  , fs = require('fs')app.listen(80);function handler (req, res) {  fs.readFile(__dirname + '/index.html',  function (err, data) {    if (err) {      res.writeHead(500);      return res.end('Error loading index.html');    }    res.writeHead(200);    res.end(data);  });}io.sockets.on('connection', function (socket) {  socket.emit('news', { hello: 'world' });  socket.on('my other event', function (data) {    console.log(data);  });});

It will use websockets where possible, and fallback to AJAX long polling or Flash polling in browsers where there is no websocket support.

As for integrating with Angular, here's a good blog post on Socket.IO and Angular:

I'll be writing about how to integrate Socket.IO to add real-time features to an AngularJS application. In this tutorial, I'm going to walk through writing a instant messaging app.

If you're already working with Express, you should check out express.io.

It has a bunch of cool features like Session support and the ability to forward normal HTTP routes to realtime routes.

Here is a module we have written for getting AngularJS push notifications working in PhoneGap / Cordava (with full instructions):http://www.scorchsoft.com/blog/free-angularjs-cordova-push-notification-plugin/

Simply download the example code and install. There is also code included for setting up the pushing component in PHP.