Please remove the scroll event applied to the document in the `beforeDestroy` hook.

[baco16g]

Describe

• In page mode, scroll event is added to document.
• But when the VirtualList is Unmounted, its event handler is not removed.

vue-virtual-scroll-list/src/index.js

Lines 71 to 75 in f4d9be6

	// in page mode we bind scroll event to document
	if (this.pageMode) {
	document.addEventListener('scroll', this.onScroll, {
	passive: false
	})

vue-virtual-scroll-list/src/index.js

Lines 85 to 87 in f4d9be6

	beforeDestroy () {
	this.virtual.destroy()
	},

To Reproduce

Steps to reproduce the behavior:

1. Prepare a Switcher to display / hide the VirtualList.
2. Scroll when VirtualList is hidden.
3. See TypeError

Reproduce demo

https://codesandbox.io/s/live-demo-virtual-list-28trm

Other

• Version: 2.1.9
• Browser: Chrome, Safari

[tangbc]

OK, I will fix it soon.

[tangbc]

Fixed and published in v2.2.0