javascript - Chinese Characters Lost in Excel -

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i have comprised following functions take table data , export excel sheet form various internet sources. works great english characters when table contains chinese letters excel document shows random chars , not chinese. have encoding in excel v. page? how can fix this?

function exporttoexcel(table, name) {     var uri = 'data:application/vnd.ms-excel;base64,';//application/vnd.openxmlformats-officedocument.spreadsheetml.sheet     var template = '<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns="http://www.w3.org/tr/rec-html40"><head><!--[if gte mso 9]><xml><x:excelworkbook><x:excelworksheets><x:excelworksheet><x:name>{worksheet}</x:name><x:worksheetoptions><x:displaygridlines/></x:worksheetoptions></x:excelworksheet></x:excelworksheets></x:excelworkbook></xml><![endif]--></head><body><table>{table}</table></body></html>';      if(!table.nodetype)         table = document.getelementbyid(table);      var ctx = {worksheet: name || 'worksheet', table: table.innerhtml};     uri += tobase64(format(template, ctx));      //window.location.href = uri;      var dllink = document.createelement('a');     if (typeof dllink.download === 'string') {         document.body.appendchild(dllink); // firefox requires link in body         dllink.download = outputfile;         dllink.href = uri;         dllink.click();         document.body.removechild(link); // remove link when done     } else {         location.replace(uri);     } }  function tobase64(data) {     if (window.btoa)         return window.btoa(unescape(encodeuricomponent(data)));     else // ie     {         var struni = data;             var strutf = struni.replace(/[\u0080-\u07ff]/g,             function(c) {                 var cc = c.charcodeat(0);                 return string.fromcharcode(0xc0 | cc >> 6, 0x80 | cc & 0x3f);             })             .replace(/[\u0800-\uffff]/g,             function(c) {                 var cc = c.charcodeat(0);                 return string.fromcharcode(0xe0 | cc >> 12, 0x80 | cc >> 6 & 0x3f, 0x80 | cc & 0x3f);             });             return strutf;      } }  function format(template, ctx) {     return template.replace(/{(\w+)}/g, function(m, p) { return ctx[p]; }); }

i added head tag in template string , tells excel open file utf-8. retained chineese characters in excel.


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