Eventbug is a add-on for Firebug (yes, add-on for add-on), which is aimed to track all events assigned to DOM elements.

The question is - how it actually works? Since, generally speaking, there is no way, at least as far as I know, to get the list of attached events in W3C event model.

Can somebody who already explored this issue tell me something about the basic idea underneath. Is it redefining addEventListener in global scope or something?

Eventbug is a add-on for Firebug (yes, add-on for add-on), which is aimed to track all events assigned to DOM elements.

The question is - how it actually works? Since, generally speaking, there is no way, at least as far as I know, to get the list of attached events in W3C event model.

Can somebody who already explored this issue tell me something about the basic idea underneath. Is it redefining addEventListener in global scope or something?

• javascript
• dom
• dom-events
• firebug

Share Improve this question Follow edited Mar 2, 2021 at 9:49 Brian Tompsett - 汤莱恩 5,8937272 gold badges6161 silver badges133133 bronze badges asked Aug 31, 2011 at 9:08 shabuncshabunc 24.9k2222 gold badges8181 silver badges112112 bronze badges

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Sorted by: Reset to default 9

It is using nsIEventListenerService which is an internal API available to Firefox add-ons. In fact, it has been introduced specifically for Firebug, see bug 448602.