Bind multiple event-callback pairs in one "Backbone.Events.on" call

[gurdotan]

Instead of issuing lots of .on calls with different arguments, this change allows to pass a map of {event strings : callbacks} which will all be bound to the caller. A second context argument can be passed to determine this for all callbacks.

So instead of this:

var obj = _.extend({}, Backbone.Events);
obj.on("play", function() {...}, this);
obj.on("stop", function() {...}, this);
...

We can do this:

var obj = _.extend({}, Backbone.Events);
obj.on({
  "play" : function() {...},
  "stop" : funciotn() {...},
  ...
}, this);

It becomes especially handy if you're binding lots of functions. This style is influenced by jQuery 1.7's new .on API.

[refaelos]

Great stuff man!

[amitzur]

I think this is a great syntactic sugar...

[anthonyshort]

This is great! It follows the style of other backbone methods that provide similar, flexible parameters.

[frankdejonge]

looks like this $this was for scope referencing?

[gurdotan]

Good catch. This variable is redundant - I removed it in the next commit. Thanks!

[refaelos]

Pshhhhhh

Sent from my Android, please excuse any typos or mistakes.
On Jul 24, 2012 1:27 PM, "Gur Dotan" <
reply@reply.github.com>
wrote:

•  return this;
  

•    while (event = events.shift()) {
  

•      list = calls[event] || (calls[event] = []);
  

•      list.push(callback, context);
  

•    }
  

•    return this;
  

•  }, this);
  

•  if (_.isObject(events)) {
  

•    // First argument is a map of event names => handlers
  

•    // Second argument is a context object
  

•    context = callback;
  

•    var $this = this;
  

Good catch. This variable is redundant - I removed it in the next commit.
Thanks!

---

Reply to this email directly or view it on GitHub:
https://github.com/documentcloud/backbone/pull/1456/files#r1223619

[jashkenas]

Good idea. I've pushed a different implementation. Let me know if I'm missing anything.

[caseywebdev]

👍 Awesome!

[JoeChapman]

Nice one

[gurdotan]

Sweet implementation, hits the spot. Thanks!

[yanivnizan]

Great stuff dude!