Duplicate keys detected: "'. This may cause an update error. vue报错

1.报错信息

错误信息展示为关键字‘keys‘,此时应该检查for循环中的key，循环的key值不为唯一性





<van-cell v-for="(item,index) in list" :key="item"> pw_item </van-cell>
此时应将item改为index，则不再报错了:

<van-cell v-for="(item,index) in list" :key="item">
    pw_item
</van-cell>