js通过a标签下载文件

const downloadExcelFile = async function (api, params, name) {
  const res = await this.$get(api, params, { responseType: 'blob'});
  try {
    let url = window.URL.createObjectURL(new Blob([res]))
    let link = document.createElement('a')
    link.style.display = 'none'
    link.href = url
    
    link.setAttribute('download', `${name}`)
    document.body.appendChild(link);
    link.click() //执行下载
    window.URL.revokeObjectURL(link.href) //释放url
    document.body.removeChild(link) //释放标签
  } catch (e) {
    this.$notify.error({
      title: '错误',
      message: '下载文件失败'
    });
  }
}
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