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
    CSS @supports

    Feature detection via JavaScript is a client side best practice and for all the right reasons, but unfortunately that same functionality hasn't been available within CSS.  What we end up doing is repeating the same properties multiple times with each browser prefix.  Yuck.  Another thing we...

  • By
    Being a Dev Dad

    I get asked loads of questions every day but I'm always surprised that they're rarely questions about code or even tech -- many of the questions I get are more about non-dev stuff like what my office is like, what software I use, and oftentimes...

Incredible Demos

  • By
    dwProgressBar v2:  Stepping and Events

    dwProgressBar was a huge hit when it debuted. For those of you who didn't catch my first post, dwProgressBar is a MooTools 1.2-based progress bar which allows for as much flexibility as possible. Every piece of dwProgressBar can be controlled by CSS...

  • By
    HTML5 Datalist

    One of the most used JavaScript widgets over the past decade has been the text box autocomplete widget.  Every JavaScript framework has their own autocomplete widget and many of them have become quite advanced.  Much like the placeholder attribute's introduction to markup, a frequently used...

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!