Uncaught TypeError: Cannot read property 'firstElementChild' of undefined

[edulan]

I have an error when quickly adding and removing an element from DOM:

Uncaught TypeError: Cannot read property 'firstElementChild' of undefined

Seems that __resizeTriggers__ is set to false in the time that resetTriggers is called.

This also happens in react-virtualized package. See this issue for more information bvaughn/react-virtualized#150

[Cnordbo]

Got the same issue in Edge And Chrome using ReactJS.

[jonataswalker]

The last commit on this project was Dec 5, 2014. It seems to me that this is abandoned. I created a very close to this project here (https://github.com/jonataswalker/watch-element-resize.js).

[SidduSomething]

Have the same issue

[klaemo]

Seeing this in the wild as well. According to our error tracking system this happens 97% on IE or Edge.

[alexlawrence]

Getting the same error. For me it´s happening during a unit test run. So far no idea what´s causing it.

Picking up what @jonataswalker said: Is the project still maintained @sdecima ?

[yanghuifeng1234]

it needs to add a parameter[true] to remove scroll event listener. Right?

element.removeEventListener('scroll', scrollListener);