create new tag
, view all tags

JavaScript coding standards

OOP with JavaScript




Naming convention for packages is lowercase.

Create base class:

var twiki = {}
Create subclass:
twiki.String = {
   // functions here

Unit testing


User interface programming

To separate markup and logic and to provide graceful degradation I have been using BehaviourContrib.

For example, if we have a 'normal' link to TWiki Web hometopic: TWiki Web Home, we can use javascript to make it open a popup window. When javascript is not available the link behaviour defaults to opening the page in the current window.

<span class="link%TWIKIWEB%%HOMETOPIC%">[[%TWIKIWEB%.%HOMETOPIC%][TWiki Web Home]]</span>

<script type="text/javascript">
// <![CDATA[
var myrules = {
   '.link%TWIKIWEB%%HOMETOPIC% a' : function(el){
      el.onclick = function() {
         // open in a popup with no other attributes than template 'viewplain'
         return false;

// ]]>

The class name link%TWIKIWEB%%HOMETOPIC% will get expanded to linkTWiki06x00WebHome

See demo page for this code.

Packaging and delivery

JavaScript files can grow large, especially when documentation is added. Of course we wouldn't want to do away with documentation just because of the filesize.

A solution is to compress the files. The tool I've been using is Dojo's ShrinkSafe. The results are quite impressive.

Note that when using Dojo, private members should be placed at the top of the class, followed by priviliged members.

Naming convention is to insert .compressed in the name, for example: twisty.js for the original file and twisty.compressed.js for the compressed file.

Naming conventions

Dojo has a list of Javascript Programming Conventions.

-- Contributors: ArthurClemens - 29 Oct 2006


Edit | Attach | Watch | Print version | History: r4 < r3 < r2 < r1 | Backlinks | Raw View | Raw edit | More topic actions
Topic revision: r4 - 2006-11-04 - ArthurClemens
  • Learn about TWiki  
  • Download TWiki
This site is powered by the TWiki collaboration platform Powered by Perl Hosted by OICcam.com Ideas, requests, problems regarding TWiki? Send feedback. Ask community in the support forum.
Copyright © 1999-2018 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.