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MIT License
Copyright (c) 2016 dandavis
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# download
========
## Summary
---------
The download() function is used to trigger a file download from JavaScript.
It specifies the contents and name of a new file placed in the browser's download directory. The input can be a URL, String, Blob, or Typed Array of data, or via a dataURL representing the file's data as base64 or url-encoded string. No matter the input format, download() saves a file using the specified file name and mime information in the same manner as a server using a Content-Disposition HTTP header.
## Getting and Using
---------
### Via NPM/Bower
`npm install downloadjs` <br />
`bower install downloadjs`
`require("downloadjs")(data, strFileName, strMimeType);`
### Simple global `download` function via `<script>` include
download(data, strFileName, strMimeType);
### Included via AMD
require(['path/to/file'], function(download) {
download(data, strFileName, strMimeType);
});
### Parameters
---------
* **data** - The Blob, File, String, or dataURL containing the soon-to-be File's contents.
* **strFileName** - The name of the file to be created. Note that older browsers (like FF3.5, Ch5) don't honor the file name you provide, instead they automatically name the downloaded file.
* **strMimeType** - The MIME content-type of the file to download. While optional, it helps the browser present friendlier information about the download to the user, encouraging them to accept the download.
## Example Usage
---------
### Plain Text
#### text string - [live demo](http://pagedemos.com/hw24em95rsfq/output/)
download("hello world", "dlText.txt", "text/plain");
#### text dataURL - [live demo](http://pagedemos.com/r9ywm98s6b29/output/)
download("data:text/plain,hello%20world", "dlDataUrlText.txt", "text/plain");
#### text blob - [live demo](http://pagedemos.com/ckcah2vp8kza/output/)
download(new Blob(["hello world"]), "dlTextBlob.txt", "text/plain");
#### text url - [live demo](http://pagedemos.com/pz6hkyqutjtw/output/)
download("/robots.txt");
#### text UInt8 Array - [live demo](http://pagedemos.com/zuyk46wbkktq/output/)
var str= "hello world", arr= new Uint8Array(str.length);
str.split("").forEach(function(a,b){
arr[b]=a.charCodeAt();
});
download( arr, "textUInt8Array.txt", "text/plain" );
### HTML
#### html string - [live demo](http://pagedemos.com/k7rwq7msu3eb/output/)
download(document.documentElement.outerHTML, "dlHTML.html", "text/html");
#### html Blob - [live demo](http://pagedemos.com/bxehm2fdf3g4/output/)
download(new Blob(["hello world".bold()]), "dlHtmlBlob.html", "text/html");
#### ajax callback - [live demo](http://pagedemos.com/arr2ym74aw8t/output/)
(note that callback mode won't work on vanilla ajax or with binary files)
$.ajax({
url: "/download.html",
success: download.bind(true, "text/html", "dlAjaxCallback.html")
});
### Binary Files
#### image from URL - [live demo](http://pagedemos.com/yvvmxbjrwq7u/output/)
download("/diff6.png");
#### Image via ajax for custom filename - [live demo](http://pagedemos.com/v2848zfgwrju/output/)
var x=new XMLHttpRequest();
x.open( "GET", "/diff6.png" , true);
x.responseType="blob";
x.onload= function(e){download(e.target.response, "awesomesauce.png", "image/png");};
x.send();
## Compatibility
---------
download.js works with a wide range of devices and browsers.
You can expect it to work for the vast majority of your users, with some common-sense limits:
* Devices without file systems like iPhone, iPad, Wii, et al. have nowhere to save the file to, sorry.
* Android support starts at 4.2 for the built-in browser, though chrome 36+ and firefox 20+ on android 2.3+ work well.
* Devices without Blob support won't be able to download Blobs or TypedArrays
* Legacy devices (no a[download]) support can only download a few hundred kilobytes of data, and can't give the file a custom name.
* Devices without window.URL support can only download a couple megabytes of data
* IE versions of 9 and before are NOT supported because the don't support a[download] or dataURL frame locations.
## FAQ
---------
* `Can I tell when a download is done/canceled?` No.
* `How can I style the temporary download link?` Define CSS class styles for `.download-js-link`.
* `What's up with Safari?` I don't know either but pull requests that improve the situation are welcome.
* `Why is my binary file corrupted?` Likely: an incorrect MIME or using jQuery ajax, which has no bin support.
* `How big of files work?` Depends, try yourself: [File Echo Demo](http://pagedemos.com/gqs6hbmjcpem/)... I do a 1GB dl routinely on a thinkpad...
## Change Log (v4.1)
---------
* 2008 :: landed a FF+Chrome compat way of downloading strings to local un-named files, upgraded to use a hidden frame and optional mime
* 2012 :: added named files via a[download], msSaveBlob() for IE (10+) support, and window.URL support for larger+faster saves than dataURLs
* 2014 :: added dataURL and Blob Input, bind-toggle arity, and legacy dataURL fallback was improved with force-download mime and base64 support
* 2015 :: converted to amd/commonJS module with browser-friendly fallback
* 2015 :: 4.1 added direct URL downloading via a single URL argument.
* 2016 :: 4.2 added large dataURL support, a more semantic codebase, and hidden temp links
* 2017 :: added support for empty dataURLs
* 20XX :: ???? Considering Zip, Tar, and other multi-file outputs, Blob.prototype.download option, and more, stay tuned folks.

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//download.js v4.2, by dandavis; 2008-2016. [MIT] 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.onload= 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
}
}else{//not data url, is it a string with special needs?
if(/([\x80-\xff])/.test(payload)){
var i=0, tempUiArr= new Uint8Array(payload.length), mx=tempUiArr.length;
for(i;i<mx;++i) tempUiArr[i]= payload.charCodeAt(i);
payload=new myBlob([tempUiArr], {type: mimeType});
}
}
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)) {
if(/^data:/.test(url)) url="data:"+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 && /^data:/.test(url)){ // 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() */
}));

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//download.js v4.2, by dandavis; 2008-2017. [MIT] see http://danml.com/download.html for tests/usage
;(function(r,l){"function"==typeof define&&define.amd?define([],l):"object"==typeof exports?module.exports=l():r.download=l()})(this,function(){return function l(a,e,k){function q(a){var h=a.split(/[:;,]/);a=h[1];var h=("base64"==h[2]?atob:decodeURIComponent)(h.pop()),d=h.length,b=0,c=new Uint8Array(d);for(b;b<d;++b)c[b]=h.charCodeAt(b);return new f([c],{type:a})}function m(a,b){if("download"in d)return d.href=a,d.setAttribute("download",n),d.className="download-js-link",d.innerHTML="downloading...",d.style.display="none",document.body.appendChild(d),setTimeout(function(){d.click(),document.body.removeChild(d),!0===b&&setTimeout(function(){g.URL.revokeObjectURL(d.href)},250)},66),!0;if(/(Version)\/(\d+)\.(\d+)(?:\.(\d+))?.*Safari\//.test(navigator.userAgent))return/^data:/.test(a)&&(a="data:"+a.replace(/^data:([\w\/\-\+]+)/,"application/octet-stream")),!window.open(a)&&confirm("Displaying New Document\n\nUse Save As... to download, then click back to return to this page.")&&(location.href=a),!0;var c=document.createElement("iframe");document.body.appendChild(c),!b&&/^data:/.test(a)&&(a="data:"+a.replace(/^data:([\w\/\-\+]+)/,"application/octet-stream")),c.src=a,setTimeout(function(){document.body.removeChild(c)},333)}var g=window,b=k||"application/octet-stream",c=!e&&!k&&a,d=document.createElement("a");k=function(a){return String(a)};var f=g.Blob||g.MozBlob||g.WebKitBlob||k,n=e||"download",f=f.call?f.bind(g):Blob;"true"===String(this)&&(a=[a,b],b=a[0],a=a[1]);if(c&&2048>c.length&&(n=c.split("/").pop().split("?")[0],d.href=c,-1!==d.href.indexOf(c))){var p=new XMLHttpRequest;return p.open("GET",c,!0),p.responseType="blob",p.onload=function(a){l(a.target.response,n,"application/octet-stream")},setTimeout(function(){p.send()},0),p}if(/^data:([\w+-]+\/[\w+.-]+)?[,;]/.test(a)){if(!(2096103.424<a.length&&f!==k))return navigator.msSaveBlob?navigator.msSaveBlob(q(a),n):m(a);a=q(a),b=a.type||"application/octet-stream"}else if(/([\x80-\xff])/.test(a)){e=0;var c=new Uint8Array(a.length),t=c.length;for(e;e<t;++e)c[e]=a.charCodeAt(e);a=new f([c],{type:b})}a=a instanceof f?a:new f([a],{type:b});if(navigator.msSaveBlob)return navigator.msSaveBlob(a,n);if(g.URL)m(g.URL.createObjectURL(a),!0);else{if("string"==typeof a||a.constructor===k)try{return m("data:"+b+";base64,"+g.btoa(a))}catch(h){return m("data:"+b+","+encodeURIComponent(a))}b=new FileReader,b.onload=function(a){m(this.result)},b.readAsDataURL(a)}return!0}});

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{
"name": "downloadjs",
"main": "download.js",
"version": "1.4.7",
"description": "file downloading using client-side javascript",
"keywords": [
"files",
"dataURL",
"blob",
"download"
],
"homepage": "http://danml.com/download.html",
"license": "MIT",
"author": {
"name": "dandavis",
"email": "rndme@users.noreply.github.com",
"url": "http://danml.com/"
},
"repository": {
"type": "git",
"url": "https://github.com/rndme/download.git"
},
"bugs": {
"email": "rndme@users.noreply.github.com"
},
"files": [
"download.js",
"download.min.js"
],
"npmName": "downloadjs",
"npmFileMap": [
{
"basePath": "/",
"files": [
"*.js"
]
}
],
"__npminstall_done": "Thu Jun 03 2021 11:07:53 GMT+0800 (中国标准时间)",
"_from": "downloadjs@1.4.7",
"_resolved": "https://registry.nlark.com/downloadjs/download/downloadjs-1.4.7.tgz"
}