Javascript - removeEventListener

I am experiencing some issues with removeEventListener. As far as I can tell, this does not actually end the event listener.

My code:

window.cpAPIEventEmitter.addEventListener("CPAPI_VARIABLEVALUECHANGED",function(){runTimer(z, x);},"cpInfoCurrentFrame");

and then later on I call:

window.cpAPIEventEmitter.removeEventListener("CPAPI_VARIABLEVALUECHANGED",function(){doRemove();},"cpInfoCurrentFrame");

If I call the addEventListener multiple times (on enter of every slide), I get multiple instances of the function runTimer() running.

When i call the removeEventListener, the function doRemove() is never called.

I am on a Mac and running Captivate 2017 10.0.0.226

Thanks!

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Correct answer

In JavaScript you cannot remove and event listener that contains an anonymous function.

You would need to use:

window.cpAPIEventEmitter.addEventListener("CPAPI_VARIABLEVALUECHANGED",someFunction,"cpInfoCurrentFrame");

A

Anonymous

Correct answer

In JavaScript you cannot remove and event listener that contains an anonymous function.

You would need to use:

window.cpAPIEventEmitter.addEventListener("CPAPI_VARIABLEVALUECHANGED",someFunction,"cpInfoCurrentFrame");

Inspiring

AH HA!

Thanks, that did the trick.

BTW - this info is out of date:

My code now looks like:

window.cpAPIEventEmitter.addEventListener("CPAPI_VARIABLEVALUECHANGED",runTimer,"cpInfoCurrentFrame");

and

window.cpAPIEventEmitter.removeEventListener("CPAPI_VARIABLEVALUECHANGED",doRemove2,"cpInfoCurrentFrame");

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