今天开发遇到一个问题，我复用了两个高度相似的组件，在用 v-if 配合开关进行展示的时候，发现组件并未被成功销毁：
解决方法：给两个组件添加不同的 :key=””
出现问题的代码：
<!-- List2 --> <List v-if="whichList===2" :whichList="2"></List> <!-- List1 --> <List v-if="whichList===1" :whichList="1"></List>
解决后：
<!-- List2 --> <List v-if="whichList===2" :whichList="2" :key="2"></List> <!-- List1 --> <List v-if="whichList===1" :whichList="1" :key="1"></List>
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