Created
June 16, 2011 01:20
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solving this.model.view with underscore.js
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| var Credentials = Backbone.Model.extend({ | |
| // ... code for a validated event here | |
| }); | |
| var LoginView = Backbone.View.extend({ | |
| initialize: function(){ | |
| this.loginButton = $("#login"); | |
| // tight coupling and leaky code... | |
| this.model.view = this; | |
| this.model.bind("validated", this.validated); | |
| }, | |
| validated: function(valid){ | |
| // even more tight coupling between the view and model | |
| // worse yet, the method, even though it's in the view, | |
| // executes within the scope of the view! | |
| if (valid){ | |
| this.loginButton.removeAttr("disabled"); | |
| } else { | |
| this.loginButton.attr("disabled", "true"); | |
| } | |
| } | |
| }); | |
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| $(function(){ | |
| var SomeModel = Backbone.Model.extend({ | |
| raiseIt: function(data){ | |
| this.set({data: data}); | |
| this.trigger("someEvent"); | |
| } | |
| }); | |
| var SomeView = Backbone.View.extend({ | |
| el: "#input", | |
| events: { "change #input": "showIt" }, | |
| initialize: function(){ | |
| this.model.bind("someEvent", this.showIt); | |
| $("#input").change(this.showIt); | |
| }, | |
| showIt: function(){ | |
| if (this.model) | |
| alert(this.model.get('data')); | |
| else | |
| alert("there is no model attribute!"); | |
| } | |
| }); | |
| var someModel = new SomeModel(); | |
| var someView = new SomeView({model: someModel}); | |
| // what do you expect the alert boxes to show for these two lines? | |
| // what do you expect it to show when you change the text input field? | |
| someModel.raiseIt("foo"); | |
| someView.showIt(); | |
| }); |
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| <html> | |
| <head> | |
| <script src="jquery-1.6.1.min.js"></script> | |
| <script src="underscore-min.js"></script> | |
| <script src="backbone-min.js"></script> | |
| <script src="example.js"></script> | |
| </head> | |
| <body> | |
| <form action="/login" id="login-form"> | |
| input: <input type="text" id="input"> | |
| </form> | |
| </body> | |
| </html> |
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| initialize: function(){ | |
| _.bindAll(this, "showIt"); | |
| this.model.bind("someEvent", this.showIt); | |
| $("#input").change(this.showIt); | |
| }, |
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| initialize: function(){ | |
| _.bindAll(this, "validated"); | |
| this.username = $("#username"); | |
| this.password = $("#password"); | |
| this.loginButton = $("#login"); | |
| this.model.bind("validated", this.validated); | |
| }, | |
| validated: function(valid){ | |
| if (valid){ | |
| this.loginButton.removeAttr("disabled"); | |
| } else { | |
| this.loginButton.attr("disabled", "true"); | |
| } | |
| } |
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