Javascript - removeEventListener

[chrismay_at_delta]

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!

[Guest · Accepted solution]

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");

[chrismay_at_delta]

AH HA!

Thanks, that did the trick.

BTW - this info is out of date:

Learn about the Common JavaScript interface for Adobe Captivate

My code now looks like:

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

and

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