JSFiddle - React, Tailwind, and code Playground

by Rapha Souza

HTML

<input maxlength="18" />

JavaScript

$("input").on("keyup", function(e)
{
    $(this).val(
        $(this).val().replace(/\D/g, '')
        .replace(/^(\d{2})(\d{3})?(\d{3})?(\d{4})?(\d{2})?/, "$1.$2.$3/$4-$5"));
});