Question

I have an application that loads 50 chapters at once. While the chapters are being viewed, I want the application to play a sound when a new chapter’s been loaded. This is how I think it’s supposed to be done

Chapters.find().observe({
  added: function (user) {
    playSound()
  }
});

However this spams the sound on initial load, not just subsequent new chapters. How do I get it to only sound off on new chapters?

Edit: Looking for a Meteor answer, rather than, setTimeout or something. Though I’ll do that if I have to.

Answer 1

You could wait for the first complete load of chapters before adding the observe callbacks.

Meteor.subscribe("chapters", someParam, function(){
    Chapters.find().observe({
      added: function (user) {
        playSound()
      }
    }); 
});

Of course you should add the observer only once, not every time the subscribe-callback fires.