window.open()下载文件重命名/js下载文件重命名/js跨域下载文件重命名

普通文件下载

// 1
var fileUrl = 'https://xxxx.docx';
window.open(fileUrl+"?attname=文档.docx");// 2
var a= document.createElement('a');
a.href = 'https://xxxx.docx';
a.download = '文档.docx';
a.target = "_blank";
a.click();

以上方式 attname 和 a.download 属性在跨域请求无效

解决跨域下载

download() {this.getBlobFile('https://xxx.xxxx.docx').then(blob => {var a = document.createElement('a');a.href = window.URL.createObjectURL(blob);a.download = '文档.docx';a.click();a.remove();});
},
getBlobFile(url) {return new Promise(resolve => {const xReq = new XMLHttpRequest();xReq.open('GET', url, true);xReq.responseType = 'blob';xReq.onload = () => {if (xReq.status === 200) {resolve(xReq.response);}};xReq.send();});
}

download(item) {
var xReq = new XMLHttpRequest();
xReq.open(‘GET’, ‘https://xxx.xxxx.docx’, true);
xReq.responseType = ‘blob’;
xReq.onload = function () {
var url = window.URL.createObjectURL(xReq.response);
var a = document.createElement(‘a’);
a.href = url;
a.download = ‘文档.docx’;
a.click();
a.remove();
};
xReq.send();
},