vue lint报错Elements in iteration expect to have 'v-bind:key'

具体报错

 vue-cli-service lint found some errors. Please fix them and try committing again.
            error: Elements in iteration expect to have 'v-bind:key' directives (vue/require-v-for-key) at src/view/electric-record/upload-image.vue:3:3:

v-for报错

原因 需要增加:key

  <div class="demo-upload-list" v-for="item in uploadList" />

更改成

  <div class="demo-upload-list" v-for="item in uploadList" :key="item.url"/>