Chrome extension: have an extension listen for an event on a page?

I have a chrome extension that im making for my site, currently i have the extension checking the database every minute for updates.

Is it possible to have the extension listen for an event on the actual page?

Something like this

this.trigger('sendUpdate', data) //this happened on the page

this.on(sendUpdate, function(){ //this is what the chrome extension listens for
    //do stuff with data
})