JavaScript Tens of thousands of data export Excel files (modified version)

The recent project to JS implementation of the data exported to Excel files, online many plug-ins to realize ~ ~ that happy, who know that the amount of data reached tens of thousands of problems: the browser not only stuck, the exported Excel file has been prompted network failure ....

Debug Debug found var Excel splicing table string, beyond the length limit of Var; Fortunately, there is a solution for seniors on the Web ~ ~ ~ Worship ing

Reference URL:51197552

Need to understand the JavaScript blob object yourself

/** * Export Excel File//example: var data = [{userName: ' Lily ', age:28, job: "Teacher", City: "Guangzhou"},{userName: ' Lucy ', age:19, job : "Doctor", City: "Shenzhen"}];if (data = = ") Return;var title = [{userName: ' name '}, {job: ' work '}, {age: ' old '} ‘ }]; Toexcel ("DataExport", data, title); ***//***toexcel: * FileName File name * jsondata exported data * ShowLabel Header*/varDOWNLOADEVT =NULL; functionToexcel (FileName, Jsondata, ShowLabel) {varArrdata =typeofJsondata! = ' object '?Json.parse (jsondata): Jsondata; var docData = new StringBuffer (); //Header    varInnerHTML =NewStringBuffer (); Docdata.append (' <table><thead> ');  for(vari = 0; i < showlabel.length; i++) {       for(varKeyinchShowlabel[i]) {Innerhtml.append (' <td> ' + showlabel[i][key] + ' </td>\r '); }} docdata.append (' <tr>\r ' + innerhtml.tostring () + ' </tr> '); Docdata.append (' </thead><tbody> '); //Row Vs Column     for(vari = 0; i < arrdata.length; i++) {      varTdrow =NewStringBuffer ();  for(vary = 0; Y < showlabel.length; y++) {             for(varKinchShowlabel[y]) {                if(Showlabel[y].hasownproperty (k)) {Tdrow.append (' <td style= ' vnd.ms-excel.numberformat:@ > ' + (arrdata[i][k] = = =NULL? ": arrdata[i][k]) + ' </td>\r '); }}} docdata.append (' <tr>\r ' + tdrow.tostring () + ' </tr> '); } docdata.append (' </tbody></table> '); Console.log ("DocData:", DocData); varDocfile =NewStringBuffer (); Docfile.append (' , docfile); Try{Console.log (' 111111111 ')        var blob = new Blob (docfile.content, {type: ' Application/vnd.ms-excel;charset=utf-8; ')        }); Console.log ("blob.size===" +blob.size); SaveAs (BLOB, FileName+ '. xlsx '); } Catch(e) {Console.log (' 22222222222 ') DownloadFile (FileName+ '. xlsx ',            ' Data:application/vnd.ms-excel;base64, ', docfile.tostring ()); }}function StringBuffer () {this.content = new Array;    } StringBuffer.prototype.append = function (str) {this.content.push (str);    } StringBuffer.prototype.prepend = function (str) {this.content.unshift (str);    } StringBuffer.prototype.toString = function () {return This.content.join (""); }  functionsaveAs (blob, filename) {varType =Blob.type; varForce_saveable_type = ' Application/octet-stream '; if(Type && type! = Force_saveable_type) {//force download, not open in browser        varSlice = Blob.slice | | Blob.webkitslice | |Blob.mozslice; Blob= Slice.call (blob, 0, Blob.size, Force_saveable_type); }    varURL =Url.createobjecturl (BLOB); varSave_link = Document.createelementns (' http://www.w3.org/1999/xhtml ', ' a '); Save_link.href=URL; Save_link.download=filename; Console.log (' Save_link: ', Save_link); varevent = document.createevent (' mouseevents '); Event.initmouseevent (' Click ',true,false, window, 0, 0, 0, 0, 0,false,false,false,false, 0,NULL);    Save_link.dispatchevent (event); Url.revokeobjecturl (URL);}functiondownloadFile (filename, header, data) {varUA =window.navigator.userAgent; if(Ua.indexof ("MSIE") > 0 | |!! Ua.match (/trident.*rv\:11\./)) {        //Internet Explorer (<= 9) Workaround by Darryl (Https://github.com/dawiong/tableExport.jquery.plugin)      //based on sampopes answer on http://stackoverflow.com/questions/22317951      // !  Not working for JSON and PDF format!       varframe = document.createelement ("iframe"); if(frame) {document.body.appendChild (frame); Frame.setattribute ("Style", "Display:none"); Frame.contentDocument.open ("Txt/html", "Replace");          Frame.contentDocument.write (data);          Frame.contentDocument.close ();          Frame.focus (); Frame.contentDocument.execCommand ("SaveAs",true, filename);        Document.body.removeChild (frame); }      }      Else {        varDownloadlink = document.createelement (' A '); if(downloadlink) {DownloadLink.style.display= ' None '; Downloadlink.download=filename; Console.log (Header+Base64Encode (data)). length); if(Header.tolowercase (). IndexOf ("base64,") >= 0) Downloadlink.href= Header +Base64Encode (data); ElseDownloadlink.href= encodeURIComponent (header +data);          Document.body.appendChild (Downloadlink); if(document.createevent) {if(Downloadevt = =NULL) downloadevt= Document.createevent (' mouseevents '); Downloadevt.initevent (' Click ',true,false);          Downloadlink.dispatchevent (DOWNLOADEVT); }          Else if(Document.createeventobject) downloadlink.fireevent (' OnClick '); Else if(typeofDownloadlink.onclick = = ' function ') Downloadlink.onclick (); /*Document.body.removeChild (downloadlink);*/        }      }    }  functionBase64Encode (input) {varKeystr = "Abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/="; varOutput = ""; varchr1, CHR2, CHR3, Enc1, Enc2, enc3, Enc4; vari = 0; Input=Utf8encode (input);  while(I <input.length) {chr1= Input.charcodeat (i++); CHR2= Input.charcodeat (i++); CHR3= Input.charcodeat (i++); Enc1= Chr1 >> 2; ENC2= ((Chr1 & 3) << 4) | (CHR2 >> 4); Enc3= ((CHR2 &) << 2) | (CHR3 >> 6); Enc4= CHR3 & 63; if(IsNaN (CHR2)) {enc3= ENC4 = 64; } Else if(IsNaN (CHR3)) {Enc4= 64; } Output= output +Keystr.charat (ENC1)+ Keystr.charat (ENC2) +Keystr.charat (enc3)+Keystr.charat (ENC4); }      returnoutput; }    functionUtf8encode (String) {string= String.Replace (/\x0d\x0a/g, "\x0a"); varUtftext = "";  for(varn = 0; n < string.length; n++) {        varc =string.charcodeat (n); if(C < 128) {Utftext+=String.fromCharCode (c); }        Else if((C > 127) && (C < 2048) ) {Utftext+ = String.fromCharCode ((c >> 6) | 192); Utftext+ = String.fromCharCode ((C & 63) | 128); }        Else{Utftext+ = String.fromCharCode ((c >> 12) | 224); Utftext+ = String.fromCharCode (((c >> 6) & 63) | 128); Utftext+ = String.fromCharCode ((C & 63) | 128); }      }      returnUtftext; }  

JavaScript Tens of thousands of data export Excel files (modified version)