vue使用blob下载文件遇到的问题小结

export function fileDownload(res) {
  let blob = new Blob([res.data], {
    type: res.data.type,
  })
  let downloadElement = document.createElement('a')
  let href = window.URL.createObjectURL(blob) //创建下载链接
  let fileName = res.headers['content-disposition']
    ? res.headers['content-disposition'].split('attachment;filename=')[1]
    : new Date().getTime()
  downloadElement.href = href
  // window.open(downloadElement.href)
  downloadElement.download = decodeURIComponent(fileName) //解码
  document.body.appendChild(downloadElement)
  downloadElement.click()
  document.body.removeChild(downloadElement)
  window.URL.revokeObjectURL(href) //释放掉blob对象
}

export function downloadFile(res, fileName) {
  const blob = new Blob([res.data], { type: res.data.type })
  let dom = document.createElement('a')
  let url = window.URL.createObjectURL(blob)
  dom.href = url
  dom.download = decodeURI(fileName)
  dom.style.display = 'none'
  document.body.appendChild(dom)
  dom.click()
  dom.parentNode.removeChild(dom)
  window.URL.revokeObjectURL(url)
}

async handleSubmit() {
      if (this.form.pushDepartment.length === 0) {
        this.$message.warning(`推送部门不能为空`)
        return false
      }
      // 导出excel表格
      let params = {
        healthCodeAlarmIds: [],
        sendDepartment: [],
      }
      this.selectData.forEach((item) => {
        let id = parseInt(item.id)
        params.healthCodeAlarmIds.push(id)
      })
      params.sendDepartment = this.form.pushDepartment
      let res = await exportInfo({ ...params })
      // console.log('res', res)
      fileDownload(res)
      // downloadFile(res, 'yj.xlsx')
    },