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129

How can i check if a JavaScript-Eventhandler has been set?

rated 0 times [ 133] [ 4] / answers: 1 / hits: 29197 / 15 Years ago, wed, june 10, 2009, 12:00:00

I've got a JavaScript-function that sets the onclick-event of some HTML-Nodes - even if that onclick-event has been set before.

How can i check if that event has already been set, so I can extend my function to set the event only on HTML-Nodes where it has not already been set?

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suzanne

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answered 15 Years ago vanessag · Accepted Answer

Check, like this:

if(typeof someNode.onclick == function) {

   // someNode has an event handler already set for the onclick event...

}

By the way, if you are using a library, you should say so - if you are, it might be easier/cleaner and would differ based on which library you are using...