通过a标签download属性下载文件

var link = document.createElement('a')
link.href = window.URL.createObjectURL(res) // href 赋值为下载地址或blob
link.download = 'string.xlsx' // 表示下载文件的建议名称;该值对于下载行为来说不一定是有用的
link.click()
link.remove()

// 新版Chrome写法
const handleDownload = (url) => {
    const urls = url.split('/')
    const name = urls[urls.length - 1]
    const link = document.createElement('a')
    link.href = window.URL.createObjectURL(new Blob([url]))
    link.download = name
    link.click()
    link.remove()
}