JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="rut"/>

<p id="error12">sdfsd</p>


<input type="text" id="rut2"/>
<input type="text" id="rut3"/>

JavaScript

$(document).ready(function(){
        $("#rut").blur(function(){
            $('#error12').html("");
            var Rut = $(this).val();
            var RemoveDotInRut = Rut.split('.').join("");
            var RemoveHypenInRut = RemoveDotInRut.split('-').join("");
            var freshString = RemoveHypenInRut.length;
            if(freshString<8 || freshString>9){
               $('#error12').html("<?php echo $this->__('Please enter a valid Rut number.') ?>");
                setTimeout(function(){
                   $("#rut").focus().val("");
               }, 0);
            }
        });
    });