SitePen: Creating and Enhancing Dojo Classes

By  on  

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
    5 Ways that CSS and JavaScript Interact That You May Not Know About

    CSS and JavaScript:  the lines seemingly get blurred by each browser release.  They have always done a very different job but in the end they are both front-end technologies so they need do need to work closely.  We have our .js files and our .css, but...

  • By
    Serving Fonts from CDN

    For maximum performance, we all know we must put our assets on CDN (another domain).  Along with those assets are custom web fonts.  Unfortunately custom web fonts via CDN (or any cross-domain font request) don't work in Firefox or Internet Explorer (correctly so, by spec) though...

Incredible Demos

  • By
    GitHub-Style Sliding Links

    GitHub seems to change a lot but not really change at all, if that makes any sense; the updates come often but are always fairly small. I spotted one of the most recent updates on the pull request page. Links to long branch...

  • By
    Duplicate DeSandro’s CSS Effect

    I recently stumbled upon David DeSandro's website when I saw a tweet stating that someone had stolen/hotlinked his website design and code, and he decided to do the only logical thing to retaliate:  use some simple JavaScript goodness to inject unicorns into their page.

Discussion

  1. 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

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!