JavaScript

Computing: Software: Programming: JavaScript

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Notes

In order to use JavaScript to control a web browser, you need to know about the Document Object Model (DOM) of that browser. Most modern browsers conform at least loosely to a standard DOM, but it is always a good idea to test the particular functions you are using in a variety of browsers. (Pre-packaged code is often written to automatically detect browser type/version and use the appropriate identifiers.)

• Debugging tools: JSLint, <angular/>, JSTestDriver, jstest, SinonJS, IntelliJ IDEA (IDE)

Issues

As of 2006, FireFox's DOM appeared to have a couple of bugs which only show up in Linux:

• Popup windows cannot be made to be "always on top" (window.open() with parameter "dependent=1")
• The onblur event is triggered by moving or resizing the window, as well as when the window loses focus

These bugs have probably been fixed in the intervening 6 years, but I haven't tested them since then.

Links

General

• Wikipedia

Mozilla Developer Center

• JavaScript
  • JavaScript Reference
• Document Object Model:
  • Mozilla developer center: Gecko DOM reference, related info
    • HTMLElement - doesn't list standard attachable events
• Components:
  • XMLHttpRequest:
    • reference
      • tutorial

Tutorials / How-to

• HTMLDog:
  • Creating Elements
  • Making Stuff Happen
• JavaScript for Cats