JSFiddle - React, Tailwind, and code Playground

HTML

<input class="element1" type="button"/>
<input class="another-element" type="button"/>

CSS

.left-bg{
    
    background:red;
}

JavaScript

$('.element1').click(function() {
    $('body').stop().delay(500).queue(function(){
        $(this).addClass('left-bg')
    });
});
$('.another-element').click(function() {
    $('body').removeClass('left-bg');
});