JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://alasql.org/console/alasql.min.js"></script>
<script src="http://alasql.org/console/xlsx.core.min.js"></script>

<button onclick="saveFile()">Save XLSX file</button>

JavaScript

window.saveFile = function saveFile () {
var data1 = [{a:1,b:10},{a:2,b:20}];
    var data2 = [{a:100,b:10},{a:200,b:20}];
    var opts = [{sheetid:"One1&amp;2",header:true},{sheetname:'Two',header:false}];
    var res = alasql('SELECT INTO XLSX("restest344b.xlsx",?) FROM ?',
                     [opts,[data1,data2]]);
}