Angular如何侦听mousedown事件？

Question

In the ngDraggable project , there is a line of code in the ngDrag directive

element.on(_pressEvents, onpress);

where

var _pressEvents = 'touchstart mousedown';

But I looked all throughout the code, and I don't see any $emit or $broadcast of either _pressEvents , touchstart or mousedown .

What's publishing these events? Is it something built into Angular?

Answer 1

These are native events, they are triggered by the browser.

Sources :

• http://www.w3.org/TR/touch-events/
• http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-eventgroupings-mouseevents