JSFiddle - React, Tailwind, and code Playground
by jcreamer898
HTML
<div id="results"></div>
JavaScript
var vals = [ "Markus", "Bryan", "Greg", "Jonathan" ];
var results = $( "#results" );
var indexes = [
$.inArray( "Bryan", vals ),
$.inArray( "Jonathan", vals ),
$.inArray( "Foo", vals )
];
results.append( indexes.join("<br />") );