上代码
入参：url,name
url: 线上文件链接
name: 文件名

 // 点击url文件下载,pdf/excle/word等
    downLoadFile(url,name){
        const xhr = new window.XMLHttpRequest()
        xhr.open('GET', url, true)
        xhr.responseType = 'blob'
        xhr.send()
        xhr.onload = () => {
        if (xhr.status === 200) {
          const url = window.URL.createObjectURL(xhr.response)
          const a = document.createElement('a')
                a.style.display = "none";
                a.href = url
                a.download = name
                document.body.appendChild(a)
                a.click()
                document.body.removeChild(a)
                window.URL.revokeObjectURL(url)
        }}
    }