JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://rawgit.com/agershun/alasql/develop/dist/alasql.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.8.0/xlsx.full.min.js"></script>
<xmp id="output"></xmp>

JavaScript

print('Async data example')

print('Checkpoint A')

alasql('SELECT * FROM XLS("https://dl.dropboxusercontent.com/u/802266/a.xls")',function(data){
        print(data);     
        print('Checkpoint B')
    });

print('Checkpoint C')
	






function print(x){
    document.getElementById('output').textContent += JSON.stringify(x,  null, '\t')+"\n";
}