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Knockout.JS Essentials

You're reading from   Knockout.JS Essentials Implement a successful JavaScript-rich application with KnockoutJS, jQuery, and Bootstrap

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Product type Paperback
Published in Feb 2015
Publisher
ISBN-13 9781784397074
Length 232 pages
Edition 1st Edition
Languages
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Toc

Table of Contents (10) Chapters Close

Preface 1. Refreshing the UI Automatically with KnockoutJS FREE CHAPTER 2. KnockoutJS Templates 3. Custom Bindings and Components 4. Managing KnockoutJS Events 5. Getting Data from the Server 6. The Module Pattern – RequireJS 7. Durandal – The KnockoutJS Framework 8. Developing Web Applications with Durandal – The Cart Project Index

Using resources in the view-model


Now that we have created our product resource, we will use it in our view-model to get our data back by following these steps:

  1. First of all, link the ProductResource.js file in the index.html file, as follows:

    <script type='text/javascript' src='js/resources/ProductResource.js'></script>

    Since the resource works asynchronously, you can't apply bindings at the end of the file because the data may not be ready yet. Therefore, bindings should be applied when the data has arrived.

    To do this, create a method called activate. This method will be fired at the end of the file, on the same line we called ko.applyBindings earlier, in the following manner:

    1. Take this line of code:

      ko.applyBindings(vm);
    2. Replace it with this one:

      vm.activate();
  2. Now define the activate method in the view-model:

    var activate = function () {
      ProductResource.all().done(allCallbackSuccess);
    };

    When you call the all method a jQuery promise is returned. To manage the results of the promise...

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