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HTML

              
                    <h1><a href="https://github.com/eligrey/FileSaver.js">FileSaver.js</a> demo</h1>
    <p>
        The following examples demonstrate how it is possible to generate and save any type of data right in the browser using the <code>saveAs()</code> FileSaver interface, without contacting any servers.
    </p>
    <section id="image-demo">
        <h2>Saving an image</h2>
        <canvas class="input" id="canvas" width="500" height="300"/>
        <form id="canvas-options">
            <label>Filename: <input type="text" class="filename" id="canvas-filename" placeholder="doodle"/>.png</label>
            <input type="submit" value="Save"/>
            <input type="button" id="canvas-clear" value="Clear"/>
        </form>
    </section>
    <section id="text-demo">
        <h2>Saving text</h2>
      <textarea class="input" id="text" placeholder="Once upon a time..."></textarea>
        <form id="text-options">
            <label>Filename: <input type="text" class="filename" id="text-filename" placeholder="a plain document"/>.txt</label>
            <input type="submit" value="Save"/>
        </form>
    </section>
    <section id="html-demo">
        <h2>Saving rich text</h2>
        <div class="input" id="html" contenteditable="">
            <h3>Some example rich text</h3>
            <ul>
                <li><del>Plain</del> <ins>Boring</ins> text.</li>
                <li><em>Emphasized text!</em></li>
                <li><strong>Strong text!</strong></li>
                <li>
                    <svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="70" height="70">
                        <circle cx="35" cy="35" r="35" fill="red"/>
                        <text x="10" y="40">image</text>
                    </svg>
                </li>
                <li><a href="https://github.com/eligrey/FileSaver.js">A link.</a></li>
            </ul>
        </div>
        <form id="html-options">
            <label>Filename: <input type="text" class="filename" id="html-filename" placeholder="a rich document"/>.xhtml</label>
            <input type="submit" value="Save"/>
        </form>
    </section>

              
            
!

CSS

              
                
              
            
!

JS

              
                /* Blob.js
 * A Blob implementation.
 * 2014-07-24
 *
 * By Eli Grey, http://eligrey.com
 * By Devin Samarin, https://github.com/dsamarin
 * License: MIT
 *   See https://github.com/eligrey/Blob.js/blob/master/LICENSE.md
 */

/*global self, unescape */
/*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true,
  plusplus: true */

/*! @source http://purl.eligrey.com/github/Blob.js/blob/master/Blob.js */

(function (view) {
	"use strict";

	view.URL = view.URL || view.webkitURL;

	if (view.Blob && view.URL) {
		try {
			new Blob;
			return;
		} catch (e) {}
	}

	// Internally we use a BlobBuilder implementation to base Blob off of
	// in order to support older browsers that only have BlobBuilder
	var BlobBuilder = view.BlobBuilder || view.WebKitBlobBuilder || view.MozBlobBuilder || (function(view) {
		var
			  get_class = function(object) {
				return Object.prototype.toString.call(object).match(/^\[object\s(.*)\]$/)[1];
			}
			, FakeBlobBuilder = function BlobBuilder() {
				this.data = [];
			}
			, FakeBlob = function Blob(data, type, encoding) {
				this.data = data;
				this.size = data.length;
				this.type = type;
				this.encoding = encoding;
			}
			, FBB_proto = FakeBlobBuilder.prototype
			, FB_proto = FakeBlob.prototype
			, FileReaderSync = view.FileReaderSync
			, FileException = function(type) {
				this.code = this[this.name = type];
			}
			, file_ex_codes = (
				  "NOT_FOUND_ERR SECURITY_ERR ABORT_ERR NOT_READABLE_ERR ENCODING_ERR "
				+ "NO_MODIFICATION_ALLOWED_ERR INVALID_STATE_ERR SYNTAX_ERR"
			).split(" ")
			, file_ex_code = file_ex_codes.length
			, real_URL = view.URL || view.webkitURL || view
			, real_create_object_URL = real_URL.createObjectURL
			, real_revoke_object_URL = real_URL.revokeObjectURL
			, URL = real_URL
			, btoa = view.btoa
			, atob = view.atob

			, ArrayBuffer = view.ArrayBuffer
			, Uint8Array = view.Uint8Array

			, origin = /^[\w-]+:\/*\[?[\w\.:-]+\]?(?::[0-9]+)?/
		;
		FakeBlob.fake = FB_proto.fake = true;
		while (file_ex_code--) {
			FileException.prototype[file_ex_codes[file_ex_code]] = file_ex_code + 1;
		}
		// Polyfill URL
		if (!real_URL.createObjectURL) {
			URL = view.URL = function(uri) {
				var
					  uri_info = document.createElementNS("http://www.w3.org/1999/xhtml", "a")
					, uri_origin
				;
				uri_info.href = uri;
				if (!("origin" in uri_info)) {
					if (uri_info.protocol.toLowerCase() === "data:") {
						uri_info.origin = null;
					} else {
						uri_origin = uri.match(origin);
						uri_info.origin = uri_origin && uri_origin[1];
					}
				}
				return uri_info;
			};
		}
		URL.createObjectURL = function(blob) {
			var
				  type = blob.type
				, data_URI_header
			;
			if (type === null) {
				type = "application/octet-stream";
			}
			if (blob instanceof FakeBlob) {
				data_URI_header = "data:" + type;
				if (blob.encoding === "base64") {
					return data_URI_header + ";base64," + blob.data;
				} else if (blob.encoding === "URI") {
					return data_URI_header + "," + decodeURIComponent(blob.data);
				} if (btoa) {
					return data_URI_header + ";base64," + btoa(blob.data);
				} else {
					return data_URI_header + "," + encodeURIComponent(blob.data);
				}
			} else if (real_create_object_URL) {
				return real_create_object_URL.call(real_URL, blob);
			}
		};
		URL.revokeObjectURL = function(object_URL) {
			if (object_URL.substring(0, 5) !== "data:" && real_revoke_object_URL) {
				real_revoke_object_URL.call(real_URL, object_URL);
			}
		};
		FBB_proto.append = function(data/*, endings*/) {
			var bb = this.data;
			// decode data to a binary string
			if (Uint8Array && (data instanceof ArrayBuffer || data instanceof Uint8Array)) {
				var
					  str = ""
					, buf = new Uint8Array(data)
					, i = 0
					, buf_len = buf.length
				;
				for (; i < buf_len; i++) {
					str += String.fromCharCode(buf[i]);
				}
				bb.push(str);
			} else if (get_class(data) === "Blob" || get_class(data) === "File") {
				if (FileReaderSync) {
					var fr = new FileReaderSync;
					bb.push(fr.readAsBinaryString(data));
				} else {
					// async FileReader won't work as BlobBuilder is sync
					throw new FileException("NOT_READABLE_ERR");
				}
			} else if (data instanceof FakeBlob) {
				if (data.encoding === "base64" && atob) {
					bb.push(atob(data.data));
				} else if (data.encoding === "URI") {
					bb.push(decodeURIComponent(data.data));
				} else if (data.encoding === "raw") {
					bb.push(data.data);
				}
			} else {
				if (typeof data !== "string") {
					data += ""; // convert unsupported types to strings
				}
				// decode UTF-16 to binary string
				bb.push(unescape(encodeURIComponent(data)));
			}
		};
		FBB_proto.getBlob = function(type) {
			if (!arguments.length) {
				type = null;
			}
			return new FakeBlob(this.data.join(""), type, "raw");
		};
		FBB_proto.toString = function() {
			return "[object BlobBuilder]";
		};
		FB_proto.slice = function(start, end, type) {
			var args = arguments.length;
			if (args < 3) {
				type = null;
			}
			return new FakeBlob(
				  this.data.slice(start, args > 1 ? end : this.data.length)
				, type
				, this.encoding
			);
		};
		FB_proto.toString = function() {
			return "[object Blob]";
		};
		FB_proto.close = function() {
			this.size = 0;
			delete this.data;
		};
		return FakeBlobBuilder;
	}(view));

	view.Blob = function(blobParts, options) {
		var type = options ? (options.type || "") : "";
		var builder = new BlobBuilder();
		if (blobParts) {
			for (var i = 0, len = blobParts.length; i < len; i++) {
				if (Uint8Array && blobParts[i] instanceof Uint8Array) {
					builder.append(blobParts[i].buffer);
				}
				else {
					builder.append(blobParts[i]);
				}
			}
		}
		var blob = builder.getBlob(type);
		if (!blob.slice && blob.webkitSlice) {
			blob.slice = blob.webkitSlice;
		}
		return blob;
	};

	var getPrototypeOf = Object.getPrototypeOf || function(object) {
		return object.__proto__;
	};
	view.Blob.prototype = getPrototypeOf(new view.Blob());
}(typeof self !== "undefined" && self || typeof window !== "undefined" && window || this.content || this));

/* canvas-toBlob.js
 * A canvas.toBlob() implementation.
 * 2016-05-26
 * 
 * By Eli Grey, http://eligrey.com and Devin Samarin, https://github.com/eboyjr
 * License: MIT
 *   See https://github.com/eligrey/canvas-toBlob.js/blob/master/LICENSE.md
 */

/*global self */
/*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true,
  plusplus: true */

/*! @source http://purl.eligrey.com/github/canvas-toBlob.js/blob/master/canvas-toBlob.js */

(function(view) {
"use strict";
var
	  Uint8Array = view.Uint8Array
	, HTMLCanvasElement = view.HTMLCanvasElement
	, canvas_proto = HTMLCanvasElement && HTMLCanvasElement.prototype
	, is_base64_regex = /\s*;\s*base64\s*(?:;|$)/i
	, to_data_url = "toDataURL"
	, base64_ranks
	, decode_base64 = function(base64) {
		var
			  len = base64.length
			, buffer = new Uint8Array(len / 4 * 3 | 0)
			, i = 0
			, outptr = 0
			, last = [0, 0]
			, state = 0
			, save = 0
			, rank
			, code
			, undef
		;
		while (len--) {
			code = base64.charCodeAt(i++);
			rank = base64_ranks[code-43];
			if (rank !== 255 && rank !== undef) {
				last[1] = last[0];
				last[0] = code;
				save = (save << 6) | rank;
				state++;
				if (state === 4) {
					buffer[outptr++] = save >>> 16;
					if (last[1] !== 61 /* padding character */) {
						buffer[outptr++] = save >>> 8;
					}
					if (last[0] !== 61 /* padding character */) {
						buffer[outptr++] = save;
					}
					state = 0;
				}
			}
		}
		// 2/3 chance there's going to be some null bytes at the end, but that
		// doesn't really matter with most image formats.
		// If it somehow matters for you, truncate the buffer up outptr.
		return buffer;
	}
;
if (Uint8Array) {
	base64_ranks = new Uint8Array([
		  62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1
		, -1, -1,  0, -1, -1, -1,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9
		, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25
		, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35
		, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51
	]);
}
if (HTMLCanvasElement && (!canvas_proto.toBlob || !canvas_proto.toBlobHD)) {
	if (!canvas_proto.toBlob)
	canvas_proto.toBlob = function(callback, type /*, ...args*/) {
		  if (!type) {
			type = "image/png";
		} if (this.mozGetAsFile) {
			callback(this.mozGetAsFile("canvas", type));
			return;
		} if (this.msToBlob && /^\s*image\/png\s*(?:$|;)/i.test(type)) {
			callback(this.msToBlob());
			return;
		}

		var
			  args = Array.prototype.slice.call(arguments, 1)
			, dataURI = this[to_data_url].apply(this, args)
			, header_end = dataURI.indexOf(",")
			, data = dataURI.substring(header_end + 1)
			, is_base64 = is_base64_regex.test(dataURI.substring(0, header_end))
			, blob
		;
		if (Blob.fake) {
			// no reason to decode a data: URI that's just going to become a data URI again
			blob = new Blob
			if (is_base64) {
				blob.encoding = "base64";
			} else {
				blob.encoding = "URI";
			}
			blob.data = data;
			blob.size = data.length;
		} else if (Uint8Array) {
			if (is_base64) {
				blob = new Blob([decode_base64(data)], {type: type});
			} else {
				blob = new Blob([decodeURIComponent(data)], {type: type});
			}
		}
		callback(blob);
	};

	if (!canvas_proto.toBlobHD && canvas_proto.toDataURLHD) {
		canvas_proto.toBlobHD = function() {
			to_data_url = "toDataURLHD";
			var blob = this.toBlob();
			to_data_url = "toDataURL";
			return blob;
		}
	} else {
		canvas_proto.toBlobHD = canvas_proto.toBlob;
	}
}
}(typeof self !== "undefined" && self || typeof window !== "undefined" && window || this.content || this));

/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */
var saveAs=saveAs||function(e){"use strict";if("undefined"==typeof navigator||!/MSIE [1-9]\./.test(navigator.userAgent)){var t=e.document,n=function(){return e.URL||e.webkitURL||e},o=t.createElementNS("http://www.w3.org/1999/xhtml","a"),r="download"in o,i=function(e){var t=new MouseEvent("click");e.dispatchEvent(t)},a=/Version\/[\d\.]+.*Safari/.test(navigator.userAgent),c=e.webkitRequestFileSystem,d=e.requestFileSystem||c||e.mozRequestFileSystem,u=function(t){(e.setImmediate||e.setTimeout)(function(){throw t},0)},s="application/octet-stream",f=0,l=4e4,v=function(e){var t=function(){"string"==typeof e?n().revokeObjectURL(e):e.remove()};setTimeout(t,l)},p=function(e,t,n){t=[].concat(t);for(var o=t.length;o--;){var r=e["on"+t[o]];if("function"==typeof r)try{r.call(e,n||e)}catch(i){u(i)}}},w=function(e){return/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(e.type)?new Blob(["\uFEFF",e],{type:e.type}):e},y=function(t,u,l){l||(t=w(t));var y,m,S,h=this,R=t.type,O=!1,g=function(){p(h,"writestart progress write writeend".split(" "))},b=function(){if(m&&a&&"undefined"!=typeof FileReader){var o=new FileReader;return o.onloadend=function(){var e=o.result;m.location.href="data:attachment/file"+e.slice(e.search(/[,;]/)),h.readyState=h.DONE,g()},o.readAsDataURL(t),void(h.readyState=h.INIT)}if((O||!y)&&(y=n().createObjectURL(t)),m)m.location.href=y;else{var r=e.open(y,"_blank");void 0===r&&a&&(e.location.href=y)}h.readyState=h.DONE,g(),v(y)},E=function(e){return function(){return h.readyState!==h.DONE?e.apply(this,arguments):void 0}},N={create:!0,exclusive:!1};return h.readyState=h.INIT,u||(u="download"),r?(y=n().createObjectURL(t),void setTimeout(function(){o.href=y,o.download=u,i(o),g(),v(y),h.readyState=h.DONE})):(e.chrome&&R&&R!==s&&(S=t.slice||t.webkitSlice,t=S.call(t,0,t.size,s),O=!0),c&&"download"!==u&&(u+=".download"),(R===s||c)&&(m=e),d?(f+=t.size,void d(e.TEMPORARY,f,E(function(e){e.root.getDirectory("saved",N,E(function(e){var n=function(){e.getFile(u,N,E(function(e){e.createWriter(E(function(n){n.onwriteend=function(t){m.location.href=e.toURL(),h.readyState=h.DONE,p(h,"writeend",t),v(e)},n.onerror=function(){var e=n.error;e.code!==e.ABORT_ERR&&b()},"writestart progress write abort".split(" ").forEach(function(e){n["on"+e]=h["on"+e]}),n.write(t),h.abort=function(){n.abort(),h.readyState=h.DONE},h.readyState=h.WRITING}),b)}),b)};e.getFile(u,{create:!1},E(function(e){e.remove(),n()}),E(function(e){e.code===e.NOT_FOUND_ERR?n():b()}))}),b)}),b)):void b())},m=y.prototype,S=function(e,t,n){return new y(e,t,n)};return"undefined"!=typeof navigator&&navigator.msSaveOrOpenBlob?function(e,t,n){return n||(e=w(e)),navigator.msSaveOrOpenBlob(e,t||"download")}:(m.abort=function(){var e=this;e.readyState=e.DONE,p(e,"abort")},m.readyState=m.INIT=0,m.WRITING=1,m.DONE=2,m.error=m.onwritestart=m.onprogress=m.onwrite=m.onabort=m.onerror=m.onwriteend=null,S)}}("undefined"!=typeof self&&self||"undefined"!=typeof window&&window||this.content);"undefined"!=typeof module&&module.exports?module.exports.saveAs=saveAs:"undefined"!=typeof define&&null!==define&&null!==define.amd&&define([],function(){return saveAs});

/*! FileSaver.js demo script
 *  2016-05-26
 *
 *  By Eli Grey, http://eligrey.com
 *  License: MIT
 *    See LICENSE.md
 */

/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/demo/demo.js */

/*jshint laxbreak: true, laxcomma: true, smarttabs: true*/
/*global saveAs, self*/

(function(view) {
"use strict";
// The canvas drawing portion of the demo is based off the demo at
// http://www.williammalone.com/articles/create-html5-canvas-javascript-drawing-app/
var
	  document = view.document
	, $ = function(id) {
		return document.getElementById(id);
	}
	, session = view.sessionStorage
	// only get URL when necessary in case Blob.js hasn't defined it yet
	, get_blob = function() {
		return view.Blob;
	}

	, canvas = $("canvas")
	, canvas_options_form = $("canvas-options")
	, canvas_filename = $("canvas-filename")
	, canvas_clear_button = $("canvas-clear")

	, text = $("text")
	, text_options_form = $("text-options")
	, text_filename = $("text-filename")

	, html = $("html")
	, html_options_form = $("html-options")
	, html_filename = $("html-filename")

	, ctx = canvas.getContext("2d")
	, drawing = false
	, x_points = session.x_points || []
	, y_points = session.y_points || []
	, drag_points = session.drag_points || []
	, add_point = function(x, y, dragging) {
		x_points.push(x);
		y_points.push(y);
		drag_points.push(dragging);
	}
	, draw = function(){
		canvas.width = canvas.width;
		ctx.lineWidth = 6;
		ctx.lineJoin = "round";
		ctx.strokeStyle = "#000000";
		var
			  i = 0
			, len = x_points.length
		;
		for(; i < len; i++) {
			ctx.beginPath();
			if (i && drag_points[i]) {
				ctx.moveTo(x_points[i-1], y_points[i-1]);
			} else {
				ctx.moveTo(x_points[i]-1, y_points[i]);
			}
			ctx.lineTo(x_points[i], y_points[i]);
			ctx.closePath();
			ctx.stroke();
		}
	}
	, stop_drawing = function() {
		drawing = false;
	}

	// Title guesser and document creator available at https://gist.github.com/1059648
	, guess_title = function(doc) {
		var
			  h = "h6 h5 h4 h3 h2 h1".split(" ")
			, i = h.length
			, headers
			, header_text
		;
		while (i--) {
			headers = doc.getElementsByTagName(h[i]);
			for (var j = 0, len = headers.length; j < len; j++) {
				header_text = headers[j].textContent.trim();
				if (header_text) {
					return header_text;
				}
			}
		}
	}
	, doc_impl = document.implementation
	, create_html_doc = function(html) {
		var
			  dt = doc_impl.createDocumentType('html', null, null)
			, doc = doc_impl.createDocument("http://www.w3.org/1999/xhtml", "html", dt)
			, doc_el = doc.documentElement
			, head = doc_el.appendChild(doc.createElement("head"))
			, charset_meta = head.appendChild(doc.createElement("meta"))
			, title = head.appendChild(doc.createElement("title"))
			, body = doc_el.appendChild(doc.createElement("body"))
			, i = 0
			, len = html.childNodes.length
		;
		charset_meta.setAttribute("charset", html.ownerDocument.characterSet);
		for (; i < len; i++) {
			body.appendChild(doc.importNode(html.childNodes.item(i), true));
		}
		var title_text = guess_title(doc);
		if (title_text) {
			title.appendChild(doc.createTextNode(title_text));
		}
		return doc;
	}
;
canvas.width = 500;
canvas.height = 300;

  if (typeof x_points === "string") {
	x_points = JSON.parse(x_points);
} if (typeof y_points === "string") {
	y_points = JSON.parse(y_points);
} if (typeof drag_points === "string") {
	drag_points = JSON.parse(drag_points);
} if (session.canvas_filename) {
	canvas_filename.value = session.canvas_filename;
} if (session.text) {
	text.value = session.text;
} if (session.text_filename) {
	text_filename.value = session.text_filename;
} if (session.html) {
	html.innerHTML = session.html;
} if (session.html_filename) {
	html_filename.value = session.html_filename;
}

drawing = true;
draw();
drawing = false;

canvas_clear_button.addEventListener("click", function() {
	canvas.width = canvas.width;
	x_points.length =
	y_points.length =
	drag_points.length =
		0;
}, false);
canvas.addEventListener("mousedown", function(event) {
	event.preventDefault();
	drawing = true;
	add_point(event.pageX - canvas.offsetLeft, event.pageY - canvas.offsetTop, false);
	draw();
}, false);
canvas.addEventListener("mousemove", function(event) {
	if (drawing) {
		add_point(event.pageX - canvas.offsetLeft, event.pageY - canvas.offsetTop, true);
		draw();
	}
}, false);
canvas.addEventListener("mouseup", stop_drawing, false);
canvas.addEventListener("mouseout", stop_drawing, false);

canvas_options_form.addEventListener("submit", function(event) {
	event.preventDefault();
	canvas.toBlobHD(function(blob) {
		saveAs(
			  blob
			, (canvas_filename.value || canvas_filename.placeholder) + ".png"
		);
	}, "image/png");
}, false);

text_options_form.addEventListener("submit", function(event) {
	event.preventDefault();
	var BB = get_blob();
	saveAs(
		  new BB(
			  [text.value || text.placeholder]
			, {type: "text/plain;charset=" + document.characterSet}
		)
		, (text_filename.value || text_filename.placeholder) + ".txt"
	);
}, false);

html_options_form.addEventListener("submit", function(event) {
	event.preventDefault();
	var
		  BB = get_blob()
		, xml_serializer = new XMLSerializer()
		, doc = create_html_doc(html)
	;
	saveAs(
		  new BB(
			  [xml_serializer.serializeToString(doc)]
			, {type: "application/xhtml+xml;charset=" + document.characterSet}
		)
		, (html_filename.value || html_filename.placeholder) + ".xhtml"
	);
}, false);

view.addEventListener("unload", function() {
	session.x_points = JSON.stringify(x_points);
	session.y_points = JSON.stringify(y_points);
	session.drag_points = JSON.stringify(drag_points);
	session.canvas_filename = canvas_filename.value;

	session.text = text.value;
	session.text_filename = text_filename.value;

	session.html = html.innerHTML;
	session.html_filename = html_filename.value;
}, false);
}(self));
              
            
!
999px
Why did the programmer quit her job? She didn't get arrays.

Console