JSFiddle - React, Tailwind, and code Playground

HTML

<div id="log"></div>

JavaScript

var $log = jQuery( "#log" );

try {
    jQuery.each( undefined, function( key, val ) {
        $log.append( key + ": " + val + "<br/>" );
    });
    $log.append( "OK" );
}
catch( x ) {
    $log.append( "ERROR: " + x );
}