JSFiddle - React, Tailwind, and code Playground

HTML

<p><a href="#!/" id="lnk_add_sit">Show/Hide</a><p>

<input name="situacao" class="add_sit" style="display: none">

JavaScript

$('#lnk_add_sit').css('cursor', 'pointer').click(function(e) {
  
    $('.add_sit').animate({
        width: 'toggle'
    }, 'fast');
});