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Asked: 2026-05-23T09:13:41+00:00

My web application uses document.createEvent and event.initEvent to create custom events of the generic

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My web application uses document.createEvent and event.initEvent to create custom events of the generic type Event.

I wonder whether this is considered good practice. On the hand side, this way I can make use of the DOM event system that is already there and do not have to invent and implement my own; on the other hand this may lead to name clashes in case future standardised event models define an event type with the name I have chosen. (Or is it possible to namespace event types?)

I am asking because I have just learnt by browsing stackoverflow that putting custom properties on DOM objects or builtin Javascript objects is considered bad practise.

EDIT
I think I have found something:
http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html#events-CustomEvent

So let me rephrase my question: Am I understanding the quoted section correctly in that it is advised to actually use a CustomEvent inside a web application?

ADDED WARNING
I have just noticed that CustomEvent is not supported in Firefox versions before 6. It is supported in current Webkit-based browsers, though.

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1 Answer

  1. Editorial Team

    If you’re going to create something and make it as namespace-proof as you can, you can do what Webkit and Mozilla do and add a name-moniker to the beginning of all of your event names. Like:

    _marc_trap_door_shut
_marc_trap_door_open
_marc_trap_door_ajar
... etc ...
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