JSFiddle - React, Tailwind, and code Playground

HTML

<div id="myId">Show seconod div, if not visible.</div>
<div id="secondDiv">Second div</div>

<a href="http://stackoverflow.com/questions/24418119/hide-class-by-default-show-that-class-when-clicking-a-link/24418211#24418211">Remove the second div.</a>

CSS

.myClass{
    display: none;
}

JavaScript

$(document).ready(function(){
    
    $('#myId').click(function(){
        $('#secondDiv').removeClass('myClass'); 
    });
    
    $('a').click(function(){
        $('#secondDiv').addClass('myClass'); 
    });
});