javascript处理事件的一些兼容写法

2021-11-11 17:36:28

绑定事件

01.

var

addEvent =

function

( obj, type, fn ) {

02.

if

(obj.addEventListener)

03.

obj.addEventListener( type, fn,

false

);

04.

else

if

(obj.attachEvent) {

05.

obj[

"e"

+type+fn] = fn;

06.

obj.attachEvent(

"on"

+type,

function

() {

07.

obj[

"e"

+type+fn]();

08.

} );

09.

10.

};

01.

var

addEvent = (

function

() {

02.

if

(document.addEventListener) {

03.

return

function

(el, type, fn) {

04.

el.addEventListener(type, fn,

false

);

05.

};

06.

else

07.

return

function

(el, type, fn) {

08.

el.attachEvent(

'on'

+ type,

function

() {

09.

return

fn.call(el, window.event);

10.

});

11.

12.

13.

})();

1.

var

removeEvent =

function

(obj, type, fn) {

2.

if

(obj.removeEventListener)

3.

obj.removeEventListener( type, fn,

false

);

4.

else

if

(obj.detachEvent) {

5.

obj.detachEvent(

"on"

+type, obj[

"e"

+type+fn] );

6.

obj[

"e"

+type+fn] =

null

7.

8.

01.

var

loadEvent =

function

(func) {

02.

var

oldonload = window.onload;

03.

if

typeof

window.onload !=

'function'

) {

04.

window.onload = func;

05.

else

06.

window.onload =

function

() {

07.

oldonload();

08.

func();

09.

10.

11.

01.

var

cancelEvent =

function

(event) {

02.

event = event||window.event

03.

if

(event.preventDefault) {

04.

event.preventDefault(  );

05.

event.stopPropagation(  );

06.

else

07.

event.returnValue =

false

08.

event.cancelBubble =

true

09.

10.

相当于Prototype.js框架的Event.element(e)

1.

var

getTarget =

function

(event){

2.

event = event || window.event;

3.

var

obj = event.srcElement ? event.srcElement : event.target;