JSFiddle - React, Tailwind, and code Playground
HTML
<input type="text" id="input"/><span></span>
JavaScript
$('#input').on('keyup',function(){
$('span').text($(this).val());
});
<input type="text" id="input"/><span></span>
$('#input').on('keyup',function(){
$('span').text($(this).val());
});