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                ~~~ /* * 事件委托(事件代理) * 利用事件的冒泡傳播機制,如果一個容器的后代元素中, * 很多元素的點擊行為(其它事件行為也是)都要做一些處理(輪播圖), * 此時我們不需要在像以前一樣一個個獲取一個個的綁定了, * 我們只需要給容器的CLICK綁定方法即可,這樣不管點擊的是哪一個后代元素, * 都會根據冒泡傳播的傳遞機制,把容器的CLICK行為觸發, * 把對應的方法執行,根據事件源,我們可以知道點擊的是誰,從而做不同的事情即可 */ ~~~ ![](https://img.kancloud.cn/0b/9a/0b9a6ffb4021d81532560198b90f0b8b_3036x816.png)
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