el-upload on-preview 扩大预览事件点击范围

1.首先说明开发环境，vue2项目，采用列表模式的el-upload组件时，加入附件预览功能

element官网给出的示范代码是以下写法

javascript 复制代码

<el-upload
  class="upload-demo"
  action="https://jsonplaceholder.typicode.com/posts/"
  :on-preview="handlePreview"
  :on-remove="handleRemove"
  :file-list="fileList"
  list-type="picture">
  <el-button size="small" type="primary">点击上传</el-button>
  <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
</el-upload>
<script>
  export default {
    data() {
      return {
        fileList: [{name: 'food.jpeg', url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100'}, {name: 'food2.jpeg', url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100'}]
      };
    },
    methods: {
      handleRemove(file, fileList) {
        console.log(file, fileList);
      },
      handlePreview(file) {
        console.log(file);
      }
    }
  }
</script>

此时遇到的问题是，点击名字可以触发预览函数，点击缩略图没效果

我们需要改变一下写法，这些在官网里边都有

javascript 复制代码

<el-upload>
        <el-button size="small" type="primary">点击上传附件</el-button>
        <div class="el-upload__tip" slot="tip">提示信息</div>
        
        <template slot="file" slot-scope="{file}">
            <img @click="handlePreview" :src="file.url" class="el-upload-list__item-thumbnail">
            <p @click="handlePreview" class="el-upload-list__item-name">{{ file.name }}</p>
            <i @click="handleRemove" class="el-icon-close"></i>
        </template>
    </el-upload>

这样就可以把预览事件同时加在名字和缩略图上，进而配合预览组件使用即可