Js-javascript Advanced Programming Study Note 9

Still 13th Chapter Event

1, all elements on the page support mouse events, except MouseEnter and MouseLeave, all mouse events will bubble.

2. Modifier keys: Shift, CTRL, ALT, Meta. The four properties represent the state of the modifier key: Shiftkey, and so on.

3. The Relatedtarget property of the event object provides information about the element. Only the mouseover and Mouseout events contain values.

4. The solution to the "too many event handlers" issue is the event delegate . Event delegates use time bubbling to specify only one event handler to manage all events of a certain type . The most appropriate events for event delegation technology include Click,MouseDown, MouseUp, KeyDown, KeyUp, and KeyPress.

Js-javascript Advanced Programming Study Note 9