JSFiddle - React, Tailwind, and code Playground

HTML

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

CSS

.left-bg{background:red}

JavaScript

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

$('.another-element').click(function() {
    $('body').removeClass('left-bg');
});