JSFiddle - React, Tailwind, and code Playground

HTML

<div id="custom-hidden">My Div</div>
<button id="submit_a" name="custom_yes" value="custom 1 yes" />CUSTOMIZE NOW</button>

CSS

#custom-hidden {display:none}

JavaScript

$('#submit_a').click(function() {
		if ($(this).val() == "custom 1 yes") {
            $(this).text("Finish Customizing")
			$("#custom-hidden").toggle('slow');
		}
    })