使用wx：for渲染一个列表，wx：key为id，gei渲染出来的内容添加一个点击事件，想通过wx：key的值来确定点击了哪一个内容，应该怎样写代码呢
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key是id，直接通过点击事件传参就行了（onClick(key)）
可以通过data-xxx="{{}}"来传值，通过e来接收，可以打印看看e