JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="search-criteria"/>
<input type="button" id="search" value="search"/>
<div class="contact-name"><h3><a href="##">Charles Smith</a></h3></div>
<div class="contact-name"><h3><a href="##">raj kumar</a></h3></div>
<div class="contact-name"><h3><a href="##">Charles Smith</a></h3></div>

JavaScript

$('.contact-name').hide();
$('#search').click(function(){
    $('.contact-name').hide();
   var txt = $('#search-criteria').val();
   $('.contact-name:contains("'+txt+'")').show();
});