JSFiddle - React, Tailwind, and code Playground

HTML

<span id="ch1">First</span>
<br />
<span id="ch2" class="action">Second</span>

CSS

body {
font-size:20px;
font-weight:bold;    
}

.action {
cursor:pointer;
font-size:14px;
}

JavaScript

$('.action').on('click',function(){
        
        $('#ch1,#ch2').toggleClass('action');
        
    });