JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/X.Y.Z/xlsx.core.min.js"></script>
<script src="https://cdn.jsdelivr.net/alasql/0.4/alasql.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:'Good',header:true},{sheetid:'Two',header:false}];
    var res = alasql('SELECT INTO XLSX("MyAwesomeData.xlsx",?) FROM ?',[opts,[data1,data2]]);
}