axios异步请求

async exportData(){
            const returnArr = []
            for(let i=0;i<index;i++){
                      const data = {
                         ...
                      }
                      console.log("正在合并数据")
                      data["page_index"] = i
                      this.exportExcel(data).then((result) => {
                          returnArr.push.apply(returnArr,result)
                      })
                  }
                  this.$axios.all(returnArr).then(this.$axios.spread(function (...returnArr){
                      require.ensure([], () => {
                          const data = this.formatJson(filterVal, returnArr)
                          export_json_to_excel(tHeader, data, "漏洞") // 参数说明  第一个，头部信息   第二个，数据   第三个，表名
                      })
                  }))
  }

• exportData方法需要注明为async,exportExcel方法中返回axios对象

exportExcel (data) {
              this.exportStatus = true
              return this.$axios({
                  url: "http://ccops-paas.cmecloud.cn/t/phoenix/vul/list/",
                  data: data,
                  method: "post",
                  responseType: "json",
              }).then((response) => {
                  this.exportStatus = false
                  var downloadlist = response.data.returnlist
                  return downloadlist
              }).catch(e=>{
                  this.$bkMessage({theme:"error",message:"请求数据失败！"})
                  this.exportStatus = false
              })
          },