Alert all viewers in my page?

Question

My question is a little bit difficult, let me explain:

I have a webpage for 10-15 workers and I want to click a button on my PC (a simple html button or something like that), and then when you press it, it appears an alert or pop-up in the screen of all the people that is on the webpage.

It's that possible?? Thanks :)

can you create an JSON object or array on server side whenever your page got connected ?? — Shubham, Dec 17 '15 at 12:02
A helpful stack answer, maybe... [Push notifications](http://stackoverflow.com/questions/9106516/push-notifications-from-server-to-user-with-php-javascript) — yjs, Dec 17 '15 at 12:08

score 0 · Accepted Answer · answered Dec 17 '15 at 12:10

This is kind of easy to do with websockets (socket.io).

You'd do something like this on the server side

socket.broadcast.emit('alert', 
{
    message: 'Alarm!'
});

And something like this on the client side:

socket.on('alert', function (data) 
{
    alert(data.message);
});

Using sockets is probably the easiest way to achieve this, but if you have not used them before it is going to take some time.

Alert all viewers in my page?

1 Answers1