其中res为后端返回的数据流，该段代码在chrome浏览器正常工作，ie11却提示 无法触发下载，有没有可用解决方法，谢谢

let blob = new Blob([res], { type: 'application/vnd.ms-excel' })
let downloadElement = document.createElement('a')
let href = window.URL.createObjectURL(blob)
downloadElement.href = href
downloadElement.download = '用户数据.xls' 
document.body.appendChild(downloadElement)
downloadElement.click()
document.body.removeChild(downloadElement) 
window.URL.revokeObjectURL(href)