dispose() does not remove mouse wheel zoom

[anvaka]

dispose() does not remove mouse wheel zoom

[anvaka]

Thanks for catching this and fixing it!

This is published as v4.4.0

[dotnetCarpenter]

Using Chrome 65.0.3325

[dotnetCarpenter]

Heh. I just found this comment in the beginning of function _addWheelListener:

// TODO: in theory this anonymous function may result in incorrect
// unsubscription in some browsers. But in practice, I don't think we should
// worry too much about it (those browsers are on the way out)

[dotnetCarpenter]

After debugging the issue in wheel, I have found that the elem is not the same on addEventListener and removeEventListener.

I'm using vue.js, and have to investigate if it's because vue.js is changing the DOM element or if it's in panzoom. What is strange if it's vue.js, is that the other event handlers seems to be removed just fine.

[dotnetCarpenter]

Found it! wheel is listening to owner but trying to remove the wheel listener on domElement.

[dotnetCarpenter]

For everyone else with this issue, I have a published a release candidate here: https://www.npmjs.com/package/@dotnetcarpenter/panzoom

[dotnetCarpenter]

@anvaka nice that you added tests! I was wondering how to test this.

[anvaka]

you can run npm test in the project's folder