JSFiddle - React, Tailwind, and code Playground

HTML

<p>g3utt</p><p>g3utt</p><button class="playb">555</button>

CSS

.as{
    color:red;
}

JavaScript

$('.playb').click(function(){
    $(this).prev().addClass("name");​
    //($this).$$prev().addClass("as");
});