a标签添加download即可下载
<a href="下载地址" download="下载名称">名称</a>
a标签下载跨域文件
<a @click="downloadFile(fileUrl,fileName)">下载文件</a>
downloadFile(url, fileName) {
var x = new XMLHttpRequest();
x.open("GET", url, true);
x.responseType = 'blob';
x.onload=function(e) {
var url = window.URL.createObjectURL(x.response)
var a = document.createElement('a');
a.href = url
a.download = fileName;
a.click()
}
x.send();
},