vue-el-upload上传组件自定义删除-预览按钮遮罩层，不受原有的上传打开文件夹

    <el-upload
              action=""
              accept=".jpg,.jpeg,.png,.ico,.gif,.bmp"
              :http-request="handleUpload"
              :list-type="modalType !== 'station' ? 'picture-card' : ''"
              :before-upload="beforeUpload"
              :before-remove="beforeRemove"
              :show-file-list="false"
              class="elUpload"
              :disabled="isDisabledUpload"
               ref="upload"
            >
                <div class="overlay"  v-if="form.diagramPic">
                    <img
                      src="@/assets/station/eye.png"
                      class="btn"
                      @click="handlePictureCardPreview(form.diagramPic)"
                    />
                    <img
                      src="@/assets/station/close.png"
                      class="btn"
                      @click.stop="deleImg()"
                    />
                  </div>
                <img v-if="form.diagramPic" :src="form.diagramPic" class="avatar">
                <i v-else class="el-icon-plus avatar-uploader-icon" />
                <div slot="tip" >
                  上传一张3M以内的图片,支持jpg/png格式
                </div>
  
            </el-upload>

使用computed监听是否开放方法

  computed: {
    isDisabledUpload() {
      return Boolean(this.form.diagramPic);
    },

@click.stop= 禁止传递方法，不打开文件夹