file download

<el-button @click="domLoad()">导出</el-button>

domLoad() {
    this.$axios({
      method: "get",
      url: "url",
      responseType: "blob"
    }).then(res => {
      let blob = new Blob([res.data], { type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" })
      let new_url = window.URL.createObjectURL(blob);
      window.location.href = new_url;
    });
  }
  ```