Backbone.BindTo
Backbone.js extension for automatic binding and unbinding of model events to views.
Features
BindToModel
In a lot of Backbone.js applications when you want to react to model events you have to write:
window.UserCardView = Backbone.View.extend({
initialize: function() {
this.model.bind('change:name', this.renderName, this);
this.model.bind('change:email', this.renderEmail, this);
},
remove: function() {
this.model.unbind('change:name', this.renderName, this);
this.model.unbind('change:email', this.renderEmail, this);
Backbone.View.prototype.remove.apply(this, arguments);
},
renderName: function() { /* ... code ... */ },
renderEmail: function() { /* ... code ... */ }
});
With Backbone.BindTo you can just do:
window.UserCardView = Backbone.View.extend({
bindToModel: {
'change:name': 'renderName',
'change:email': 'renderEmail'
},
renderName: function() { /* ... code ... */ },
renderEmail: function() { /* ... code ... */ }
});
BindToCollection
Of course, there is a similar method for binding to collection events:
window.TodoListView = Backbone.View.extend({
bindToCollection: {
'add': 'renderNewTask'
},
renderNewTask: function() { /* ... code ... */ }
});
bindTo
You can also use a generic bind function:
window.CommentView = Backbone.View.extend({
initialize: function() {
this.parentView.on('editing:start', this.onEditingStart, this);
},
remove: function() {
this.parentView.off('editing:start', this.onEditingStart, this);
Backbone.View.prototype.remove.apply(this, arguments);
},
onEditingStart: function() { /* ... code ... */ }
});
Can be simplified as:
window.CommentView = Backbone.View.extend({
initialize: function() {
this.bindTo(this.parentView, 'editing:start', 'onEditingStart');
},
onEditingStart: function() { /* ... code ... */ }
});
Remove
Backbone.BindTo automatically unbinds
from all model and collection events when the view element is removed via Backbone.View#remove
. Also unbinds from all events binded via #bindTo
.
noConflict
If extending directly Backbone.View
bothers you. You can use the Backbone.BindTo.noConflict
method. It restores Backbone.View
to its original value. And returns the Backbone.BindTo.View
object which has the bindToModel
and bindToCollection
helpers.
window.BindToView = Backbone.BindTo.noConflict()
Installing
Just copy lib/backone_bind_to.js
into your project. Or if you are using CoffeeScript you can use directly - src/backbone_bind_to.coffee
.
Requirements
Backbone.js - 0.9.2+
Running the tests
Just open - test/runner.html
Contributing
Every fresh idea and contribution will be highly appreciated.
If you are making changes please do so in the coffee
files. And then compile them with:
cake build
License
MIT License.