Callback when slider drag has ended

[bolau]

This function solves the problem (这个功能解决的问题)

The only callback the slider has is on-update. If I want to start longer computation or make a web request after the slider has been updated, the high frequency of updates when dragging the mouse causes problems. I would like to get a different callback when the drag action as ended (mouse or touch). It should also fire, if the value was changed by keyboard.

Or is there a default callback for such elements, that I don't know about, and that would solve this problem?

Expected API (期望的 API)

The callback "finished" should be called on mouse up, dragend, touchend or similar events.