Building Resilient Systems on AWS: Learn how to design and implement a resilient, highly available, fault-tolerant infrastructure on AWS.

SitePen: Creating and Enhancing Dojo Classes

By David Walsh on July 1, 2010

You have probably noted over the past few months that I've been working a lot with the Dojo Toolkit. SitePen has been kind enough to allow me to guest blog about a Dojo topic I find very interesting: creating and enhancing Dojo classes. From the post:

Like all top-notch JavaScript toolkits, Dojo tries to make its classes as flexible as possible, knowing that users of the toolkit may have different ideas about how a given class or class method should work. Luckily, Dojo provides you a number of methods by which you can subclass or modify existing classes. Let's examine a few ways you can make Dojo classes exactly the way you like.

Click here to check it out!

Recent Features

By David WalshMay 18, 2011
CSS Gradients
With CSS border-radius, I showed you how CSS can bridge the gap between design and development by adding rounded corners to elements. CSS gradients are another step in that direction. Now that CSS gradients are supported in Internet Explorer 8+, Firefox, Safari, and Chrome...
By David WalshJuly 30, 2013
9 More Mind-Blowing WebGL Demos
With Firefox OS, asm.js, and the push for browser performance improvements, canvas and WebGL technologies are opening a world of possibilities. I featured 9 Mind-Blowing Canvas Demos and then took it up a level with 9 Mind-Blowing WebGL Demos, but I want to outdo...

Incredible Demos

By David WalshDecember 7, 2009
Create a Sexy Persistent Header with Opacity Using MooTools or jQuery
I've been working with the Magento eCommerce solution a lot lately and I've taken a liking to a technique they use with the top bar within their administrative control panel. When the user scrolls below a specified threshold, the top bar becomes attached to the...
By David WalshMay 18, 2011
CSS Gradients
With CSS border-radius, I showed you how CSS can bridge the gap between design and development by adding rounded corners to elements. CSS gradients are another step in that direction. Now that CSS gradients are supported in Internet Explorer 8+, Firefox, Safari, and Chrome...

Discussion

Bitels

Hi,
Maybe you’ll be able to help me with understanding new way of class definition in new dojo. I’m using latest version of dojo. I try to define a few classes in separate files. Example (js/TwitterManager.js):

require([ "dojo/_base/declare", "dojo/request/script"],
    function( declare, script)
    {
       declare("TwitterManager", script, {
            // The default username
            username: "defaultUser",
            get: function()
            {
                script.get("http://search.twitter.com/search.json", {
                        jsonp: "callback",
                        query: {q: "#dojo"}
                    }).then(function(response){
                        //we're only interested in response.results, so strip it off and return it
                        return response.results;
                    });
            }
        });});

Then I try to instantiate this class in main file (index.html):

require(["dojo/on", "dojo/dom", "dojo/query",  "dojo/mouse", "dojo/domReady!"],
    function(on, dom, query, mouse) {
        var x = new TwitterManager();
        var results = x.get();
});

This code doesn’t work. But when I remove from class definition “request/script” module it works fine. I really need to use “script.get” method in this class. Of course all code might be put in index.html :) but I look for OOP approach in dojo 1.8.

Thanks