vue 数据导入加载样式

<el-form :inline="true" size="small">
    <el-col :span="2">
      <el-upload
          class="margin-left"
          ref="upload"
          :action="action"
          :before-upload="importLoad"
          :on-success="handleSuccess"
          :on-error="handleError"
          :show-file-list="false"
          :accept="fileAccept">
        <el-button type="primary" v-loading.fullscreen.lock="importLoading" :size="size">导入</el-button>
      </el-upload>
    </el-col>
    <el-col :span="2">
      <el-button type="primary" class="margin-bottom" :size="size" @click="downloadTemplate">模板下载</el-button>
    </el-col>
</el-form>


importLoad() {
    this.importLoading = true
},
handleSuccess(res, file, fileList) {
    if(res.code === 200) {
        this.importData = res.data
        this.importDataTotal = res.data.length
        this.importDialog = true
        this.importLoading = false
    } else {
        this.importLoading = false
        this.$message.error(res.message)
    }
},
handleError(res){
    this.importLoading = false
    this.$message.error(res.message)
},

 v-loading.fullscreen.lock