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');
}
})