JSFiddle - React, Tailwind, and code Playground
HTML
<script src="https://cdn.jsdelivr.net/alasql/0.3/alasql.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.7.12/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:'One',header:true},{sheetid:'Two',header:false}];
var res = alasql('SELECT INTO XLSX("restest344b.xlsx",?) FROM ?',
[opts,[data1,data2]]);
}