backbone.fwd

Forward events from one Backbone object, through another.

Get The Package

Grab files from the dist folder, including the uncompressed or minified.

Source code is found in the src folder.

To run a build, npm install and then grunt.

You can run the specs on their own with grunt specs.

Using backbone.fwd

Call the .fwd on a target object, passing a source object as a parameter. For example, if you want to have a parent Model forward all events form a child Model, you would set it up like this:

// set up the parent with forwarding
var parent = new Backbone.Model();
parent.fwd = backbone.fwd;

// set up a child
var child = new Backbone.Model();

// forward all child evens through the parent
parent.fwd(child);


// handle the "foo" event, which will be
// triggered from the child model
parent.on("foo", function(bar){
  console.log(bar);
});

// trigger the "foo" event from the child and
// watch the parent handle it
child.trigger("foo", "baz");

This will forward all events from child, through parent.

Configuring Prefix / Suffix

You can configure an event name prefix and suffix for the forwarded events, using the prexix and suffix values in a second parameter passed to the fwd call. The prefix and suffix will be prepended / appended with a ":".

var M = Backbone.Model.extend({
  fwd: Backbone.fwd
});

var parent = new M();
var child = new Backbone.Model();

// configure fowarding with a prefix and suffix
parent.fwd(child, {
  prefix: "pre",
  suffix: "post"
});

// handle the event w/ the pre/suffix name
parent.on("pre:name:post", function(){
  // do stuff here
});

// trigger the event. the prefix and suffix
// will be added automatically
child.trigger("name");

In this example, the child object triggers a "name" event, but the parent event handler looks for a "pre:name:post" event because of the specified prefix and suffix.

Attached .fwd vs .call/.apply

The .fwd method can either be used with .call/.apply, or attached to an object that wants to have the method available. It can also be attached to object definitions.

// attach fwd to object definition / prototype
var MyView = Backbone.View.extend({
  fwd: backbone.fwd
});

// attach fwd to object instance
var m = new Backbone.Model();
m.fwd = backbone.fwd;

// .apply or .call on parent
var parent = new Backbone.Model();
var children = new Backbone.Collection();
backone.fwd.apply(parent, children);

Copyright & License

Copyright ©2014 Muted Solutions, LLC. All Rights Reserved.

Distributed under MIT license.