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注册事件的兼容性处理 #22

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zlluGitHub opened this issue Apr 27, 2018 · 0 comments
Open

注册事件的兼容性处理 #22

zlluGitHub opened this issue Apr 27, 2018 · 0 comments

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@zlluGitHub
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  • 注册事件的方式

  1. ele.on事件类型 = function(){}
  2. addEventListener(事件类型,事件处理函数,useCapture) 第三个参数默认是false，冒泡阶段执行
  3. attachEvent(事件类型，事件处理函数)

  • 兼容性问题

  1. 注册的事件的处理函数中的，this指向不一致:
    使用addEventListener的方式注册的点击事件的回调函数中的this 指向target，但是使用attachEvent的方式注册点击事件的回调函数中的this 指向window。

  2. 3种注册事件的方式中，回调函数内获取事件对象的方式也是不一致的要让他们统一，在第二种的
    事件注册方式（attachEvent）中，手动给handler传递window.event。
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