//download.js v4.2, by dandavis; 2008-2016. [CCBY2] see http://danml.com/download.html for tests/usage
// v1 landed a FF+Chrome compat way of downloading strings to local un-named files, upgraded to use a hidden frame and optional mime
// v2 added named files via a[download], msSaveBlob, IE (10+) support, and window.URL support for larger+faster saves than dataURLs
// v3 added dataURL and Blob Input, bind-toggle arity, and legacy dataURL fallback was improved with force-download mime and base64 support. 3.1 improved safari handling.
// v4 adds AMD/UMD, commonJS, and plain browser support
// v4.1 adds url download capability via solo URL argument (same domain/CORS only)
// v4.2 adds semantic variable names, long (over 2MB) dataURL support, and hidden by default temp anchors
// https://github.com/rndme/download
(function (root, factory) {
if (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module.
define([], factory);
} else if (typeof exports === 'object') {
// Node. Does not work with strict CommonJS, but
// only CommonJS-like environments that support module.exports,
// like Node.
module.exports = factory();
} else {
// Browser globals (root is window)
root.download = factory();
}(this, function () {
return function download(data, strFileName, strMimeType) {
var self = window, // this script is only for browsers anyway...
defaultMime = "application/octet-stream", // this default mime also triggers iframe downloads
mimeType = strMimeType || defaultMime,
payload = data,
url = !strFileName && !strMimeType && payload,
anchor = document.createElement("a"),
toString = function(a){return String(a);},
myBlob = (self.Blob || self.MozBlob || self.WebKitBlob || toString),
fileName = strFileName || "download",
blob,
reader;
myBlob= myBlob.call ? myBlob.bind(self) : Blob ;
if(String(this)==="true"){ //reverse arguments, allowing download.bind(true, "text/xml", "export.xml") to act as a callback
payload=[payload, mimeType];
mimeType=payload[0];
payload=payload[1];
if(url && url.length< 2048){ // if no filename and no mime, assume a url was passed as the only argument
fileName = url.split("/").pop().split("?")[0];
anchor.href = url; // assign href prop to temp anchor
if(anchor.href.indexOf(url) !== -1){ // if the browser determines that it's a potentially valid url path:
var ajax=new XMLHttpRequest();
ajax.open( "GET", url, true);
ajax.responseType = 'blob';
ajax.οnlοad= function(e){
download(e.target.response, fileName, defaultMime);
setTimeout(function(){ ajax.send();}, 0); // allows setting custom ajax headers using the return:
return ajax;
} // end if valid url?
} // end if url?
//go ahead and download dataURLs right away
if(/^data\:[\w+\-]+\/[\w+\-]+[,;]/.test(payload)){
if(payload.length > (1024*1024*1.999) && myBlob !== toString ){
payload=dataUrlToBlob(payload);
mimeType=payload.type || defaultMime;
}else{
return navigator.msSaveBlob ? // IE10 can't do a[download], only Blobs:
navigator.msSaveBlob(dataUrlToBlob(payload), fileName) :
saver(payload) ; // everyone else can save dataURLs un-processed
}//end if dataURL passed?
blob = payload instanceof myBlob ?
payload :
new myBlob([payload], {type: mimeType}) ;
function dataUrlToBlob(strUrl) {
var parts= strUrl.split(/[:;,]/),
type= parts[1],
decoder= parts[2] == "base64" ? atob : decodeURIComponent,
binData= decoder( parts.pop() ),
mx= binData.length,
i= 0,
uiArr= new Uint8Array(mx);
for(i;i<mx;++i) uiArr[i]= binData.charCodeAt(i);
return new myBlob([uiArr], {type: type});
function saver(url, winMode){
if ('download' in anchor) { //html5 A[download]
anchor.href = url;
anchor.setAttribute("download", fileName);
anchor.className = "download-js-link";
anchor.innerHTML = "downloading...";
anchor.style.display = "none";
document.body.appendChild(anchor);
setTimeout(function() {
anchor.click();
document.body.removeChild(anchor);
if(winMode===true){setTimeout(function(){ self.URL.revokeObjectURL(anchor.href);}, 250 );}
}, 66);
return true;
// handle non-a[download] safari as best we can:
if(/(Version)\/(\d+)\.(\d+)(?:\.(\d+))?.*Safari\//.test(navigator.userAgent)) {
url=url.replace(/^data:([\w\/\-\+]+)/, defaultMime);
if(!window.open(url)){ // popup blocked, offer direct download:
if(confirm("Displaying New Document\n\nUse Save As... to download, then click back to return to this page.")){ location.href=url; }
return true;
//do iframe dataURL download (old ch+FF):
var f = document.createElement("iframe");
document.body.appendChild(f);
if(!winMode){ // force a mime that will download:
url="data:"+url.replace(/^data:([\w\/\-\+]+)/, defaultMime);
f.src=url;
setTimeout(function(){ document.body.removeChild(f); }, 333);
}//end saver
if (navigator.msSaveBlob) { // IE10+ : (has Blob, but not a[download] or URL)
return navigator.msSaveBlob(blob, fileName);
if(self.URL){ // simple fast and modern way using Blob and URL:
saver(self.URL.createObjectURL(blob), true);
}else{
// handle non-Blob()+non-URL browsers:
if(typeof blob === "string" || blob.constructor===toString ){
try{
return saver( "data:" + mimeType + ";base64," + self.btoa(blob) );
}catch(y){
return saver( "data:" + mimeType + "," + encodeURIComponent(blob) );
// Blob but not URL support:
reader=new FileReader();
reader.onload=function(e){
saver(this.result);
reader.readAsDataURL(blob);
return true;
}; /* end download() */
}));
download('后端数据流地址','文件名',"video/mp4");
1. window.location.hrefwindow.location.href = 'https://*****';2. window.locationwindow.location='https://*****';3. iframefunction(url){ try { var elemIF = document.createElement("iframe"); elemIF.src = url; elemIF.s
JavaScript通过window.open（url）下载文件修改文件名
前端在页面上用window.open(filePath)下载服务器本地存储的文件，下载的名称为存储时的名称，若想要重新命名。用以下方法：
function downloadFile(filePath,name) {
const link = document.createElement('a')
link.style.display = 'none'
link.href = filePath
const content = r.data
const blob = new Blob([content])
if ('download' in document.createElement('a')) {
<button onclick="downloadEvt('http://192.168.66.183:13666/download?name=HAP.pdf')">a标签下载</button>
<script>
function downloadEvt(url, fileName = '未知文件') {
const el = document.createElement('a');
<button onClick="download()">a标签下载</button>
<script>
function download(url = 'http:www.xxx.com/download?name=file.pdf', fileName = '未知文件') {
const a = document.createElement('a');
a.style.display = '
//res:数据流，fileName:文件名称
export const exprotZipAsync = (res, fileName) => {
return new Promise((resolve, reject) => {
if (res.type) {
//type:转换的类型文件
const blob = new Blob([res], { type: 'application/zip' })
let link =
var blob = xhr.response;
var fileName = 'file.zip'; // 下载文件的文件名
if (window.navigator.msSaveOrOpenBlob) {
window.navigator.msSaveBlob(blob, fileName);
} else {
var link = document.createElement('a');
link.href = window.URL.createObjectURL(blob);
link.download = fileName;
link.click();
window.URL.revokeObjectURL(link.href);
xhr.send();
其中，url参数为要下载的文件的URL地址，fileName为下载文件的文件名。在函数中，首先创建一个XMLHttpRequest对象，然后使用open方法打开一个GET请求，设置responseType为blob，表示响应数据为二进制数据。接着，设置onload回调函数，当请求成功时，获取响应数据，并创建一个a标签，设置其href属性为响应数据的URL，download属性为文件名，然后模拟点击a标签，触发文件下载。最后，使用window.URL.revokeObjectURL方法释放URL对象。
npm ERR! { Error: EPERM: operation not permitted, mkdir 'C:\Program Files\nodejs\node_cache\_locks'
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vue : 无法加载文件 G:\nodejs\node_global\vue.ps1，因为在此系统上禁止运行脚本。有关详细信息，请参阅 https:/go.microsoft.com/fwlink/?
23744
