47 lines
1.0 KiB
Markdown
47 lines
1.0 KiB
Markdown
# 20190925
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* 给任意元素添加监听器封装函数
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```js
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function addEventListener(ele,type,fn) {
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if(ele.addEventListener) {
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ele.addEventListener(type,fn,false)
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} else if (ele.attachEvent) {
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ele.attachEvent('on' + type, fn)
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} else {
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ele['on' + type] = fn
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}
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}
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```
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* 给任意事件解绑监听器封装函数
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```js
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//如需解绑监听器，则添加事件必须为命名函数
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function removeEventListener(ele, type, fn) {
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if(ele.removeEventListener) {
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ele.removeEVentListener(type, fn, false)
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} else if (ele.detachEvent) {
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ele.detachEvent('on' + type, fn)
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} else {
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ele['on' + type] = fn
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}
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}
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```
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* 阻止事件冒泡
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```js
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//e | window.event ：事件参数对象，前者是w3c，后者IE
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//google,ie8 | firefox不支持
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//火狐不支持 window.event
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window.event.cancelBubble = true;
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e.cancelBubble = true;
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//w3c firefox,google | ie8不支持
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e.stopPropagation();
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``` |