数据流文件下载

• 封装数据流文件下载

downFile (res,name) {
          const content = res.data
          const blob = new Blob([content])
          const fileName = `${name}.zip`
          if ('download' in document.createElement('a')) { // 非IE下载
              const elink = document.createElement('a')
              elink.download = fileName
              elink.style.display = 'none'
              elink.href = URL.createObjectURL(blob)
              document.body.appendChild(elink)
              elink.click()
              URL.revokeObjectURL(elink.href) // 释放URL 对象
              document.body.removeChild(elink)
          } else { // IE10+下载
              navigator.msSaveBlob(blob, fileName)
          }
      },