DOM listeners haven't been removed when vm is destroyed, is this expected?

[javoski]

Vue.js version

2.2.1

Reproduction Link

https://jsfiddle.net/xujiongbo/jj7vatms/3/

Steps to reproduce

Open the link, click Pic1 delegate. (sorry about that the demo is a little complicated)

What is Expected?

As the document says, all event listeners are automatically removed when vm is destroyed. Image load event should not been triggered after component Pic1 is destroyed and the click event on the outermost element of Pic1 should have been removed.

What is actually happening?

The image load event was triggered after component Pic1 is destroyed and the click event on the outermost element of Pic1 haven't been removed.

Is this a bug ? or I misread the document ?

[yyx990803]

The doc is true for 1.x for not for 2.x. We need to update it.

In 2.x we no longer remove the DOM listeners when destroying vms, since all supported browsers actually can correctly garbage-collect them.

[faylai]

But it can slow garbage-collect，and make the Memory snapshot mess up.