Detailed explanation of examples of using FileSaver.js to export Excel files from the browser

This article mainly introduces the example of js based on FileSaver.js browser to export Excel files. It has certain reference value. Those who are interested can learn about it.

This article introduces the js based on FileSaver.js browser. Export the Excel file, share it with everyone, and make a note for yourself

Limitation 1: Different browsers have different restrictions on blob objects

Look specifically at the following table (from FileSaver.js):

Browser	Constructs as	Filenames	Max Blob Size	Dependencies
Firefox 20+	Blob	Yes	800 MiB	None
Firefox c6c4f25f0c385f60b1ad253347585da5 tag~Whether you write HTML, write JavaScript, or dynamically create it, you can create it in the way you like. Enough. FileSaver.js /* FileSaver.js * A saveAs() FileSaver implementation. * 1.3.2 * 2016-06-16 18:25:19 * * License: MIT * See https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md */ /*global self */ /*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */ /*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */ var saveAs = saveAs || (function(view) { "use strict"; // IE <10 is explicitly unsupported if (typeof view === "undefined" || typeof navigator !== "undefined" && /MSIE [1-9]\./.test(navigator.userAgent)) { return; } var doc = view.document // only get URL when necessary in case Blob.js hasn&#39;t overridden it yet , get_URL = function() { return view.URL || view.webkitURL || view; } , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a") , can_use_save_link = "download" in save_link , click = function(node) { var event = new MouseEvent("click"); node.dispatchEvent(event); } , is_safari = /constructor/i.test(view.HTMLElement) || view.safari , is_chrome_ios =/CriOS\/[\d]+/.test(navigator.userAgent) , throw_outside = function(ex) { (view.setImmediate || view.setTimeout)(function() { throw ex; }, 0); } , force_saveable_type = "application/octet-stream" // the Blob API is fundamentally broken as there is no "downloadfinished" event to subscribe to , arbitrary_revoke_timeout = 1000 * 40 // in ms , revoke = function(file) { var revoker = function() { if (typeof file === "string") { // file is an object URL get_URL().revokeObjectURL(file); } else { // file is a File file.remove(); } }; setTimeout(revoker, arbitrary_revoke_timeout); } , dispatch = function(filesaver, event_types, event) { event_types = [].concat(event_types); var i = event_types.length; while (i--) { var listener = filesaver["on" + event_types[i]]; if (typeof listener === "function") { try { listener.call(filesaver, event || filesaver); } catch (ex) { throw_outside(ex); } } } } , auto_bom = function(blob) { // prepend BOM for UTF-8 XML and text/* types (including HTML) // note: your browser will automatically convert UTF-16 U+FEFF to EF BB BF if (/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) { return new Blob([String.fromCharCode(0xFEFF), blob], {type: blob.type}); } return blob; } , FileSaver = function(blob, name, no_auto_bom) { if (!no_auto_bom) { blob = auto_bom(blob); } // First try a.download, then web filesystem, then object URLs var filesaver = this , type = blob.type , force = type === force_saveable_type , object_url , dispatch_all = function() { dispatch(filesaver, "writestart progress write writeend".split(" ")); } // on any filesys errors revert to saving with object URLs , fs_error = function() { if ((is_chrome_ios || (force && is_safari)) && view.FileReader) { // Safari doesn&#39;t allow downloading of blob urls var reader = new FileReader(); reader.onloadend = function() { var url = is_chrome_ios ? reader.result : reader.result.replace(/^data:[^;]*;/, &#39;data:attachment/file;&#39;); var popup = view.open(url, &#39;_blank&#39;); if(!popup) view.location.href = url; url=undefined; // release reference before dispatching filesaver.readyState = filesaver.DONE; dispatch_all(); }; reader.readAsDataURL(blob); filesaver.readyState = filesaver.INIT; return; } // don&#39;t create more object URLs than needed if (!object_url) { object_url = get_URL().createObjectURL(blob); } if (force) { view.location.href = object_url; } else { var opened = view.open(object_url, "_blank"); if (!opened) { // Apple does not allow window.open, see https://developer.apple.com/library/safari/documentation/Tools/Conceptual/SafariExtensionGuide/WorkingwithWindowsandTabs/WorkingwithWindowsandTabs.html view.location.href = object_url; } } filesaver.readyState = filesaver.DONE; dispatch_all(); revoke(object_url); } ; filesaver.readyState = filesaver.INIT; if (can_use_save_link) { object_url = get_URL().createObjectURL(blob); setTimeout(function() { save_link.href = object_url; save_link.download = name; click(save_link); dispatch_all(); revoke(object_url); filesaver.readyState = filesaver.DONE; }); return; } fs_error(); } , FS_proto = FileSaver.prototype , saveAs = function(blob, name, no_auto_bom) { return new FileSaver(blob, name || blob.name || "download", no_auto_bom); } ; // IE 10+ (native saveAs) if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) { return function(blob, name, no_auto_bom) { name = name || blob.name || "download"; if (!no_auto_bom) { blob = auto_bom(blob); } return navigator.msSaveOrOpenBlob(blob, name); }; } FS_proto.abort = function(){}; FS_proto.readyState = FS_proto.INIT = 0; FS_proto.WRITING = 1; FS_proto.DONE = 2; FS_proto.error = FS_proto.onwritestart = FS_proto.onprogress = FS_proto.onwrite = FS_proto.onabort = FS_proto.onerror = FS_proto.onwriteend = null; return saveAs; }( typeof self !== "undefined" && self || typeof window !== "undefined" && window || this.content )); // `self` is undefined in Firefox for Android content script context // while `this` is nsIContentFrameMessageManager // with an attribute `content` that corresponds to the window if (typeof module !== "undefined" && module.exports) { module.exports.saveAs = saveAs; } else if ((typeof define !== "undefined" && define !== null) && (define.amd !== null)) { define("FileSaver.js", function() { return saveAs; }); } Calling method function expToExcel(){ var content = $("#report").html(); var blob = new Blob(["Hello, world!"], { type: "text/plain;charset=utf-8" }); saveAs(blob, "hello world.txt"); }

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