官网中有使用方法，但是我实际上手之后会出现白屏，解决办法如下：

    <el-button type="text" size="small" @click="delRow(scope)">    
        删除
    </el-button>



      loading: false, // loading 动画
      loadingInstance: null,



  delRow(row) {
      this.loading = true;
      this.$nextTick(() => {
        const target = document.querySelector(".el-dialog__body");
        let options = {
          lock: true,
          text: "重新绘制中...",
          spinner: "el-icon-loading",
          background: "rgba(0, 0, 0, 0.7)",
        };
        this.loadingInstance = this.$loading(options, target);
      });
      setTimeout(() => {
        this.loading = false;
        this.loadingInstance.close();

        // 业务代码 ...
      }, 500);
    },