JavaScript statement semantics Daquan (7)

1. Events

onmousedown--Mouse Down Events

When the mouse button is triggered, depending on the mouse button will have different values passed in, left button 0, wheel 1, right button 2, different browsers may be different.

onmousemove--triggers when the mouse moves

onkeydown--when keyboard keys are triggered

2. Element coordinates

The offset relative to the event source object, which is the element coordinate, relative coordinate
Console.log (event.offsetx+ ', ' +event.offsety)
The location of the viewable area, the browser coordinates
Console.log (event.clientx+ ', ' +event.clienty)
Entire screen coordinates
Console.log (event.screenx+ ', ' +event.screeny)

3. Stop bubbling

Event.stoppropagation ();
Event.cancelbubble=true;//ie Way

4. Monitoring Events

Id1.addeventlistener (' click ', function () {
Alert (1);
},true);

JavaScript statement semantics Daquan (7)