使用VScode开发vue中，v-for在Eslint的规则检查下出现报错：如下
Elements in iteration expect to have ‘v-bind:key’ directives；
改正方法呢 就是后面加上:key="item" 就好了，当然也有屏蔽eslint检查的方法(我没用，有兴趣可自行百度)。。。
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