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              <h1>Cross Browser HTML5 Validation</h1>
<p>Works in the latest version of all browsers. <strong>Note</strong> Codepen iframes may cause issues with validation messages showing.</p>
<form class="validate-form">
  <input type="text" 
         title="required input" 
         required />
  <input type="text" 
         title="Must be 5 numeric numbers" 
         placeholder="zip code" 
         required />
  <input type="submit" />
<p>Status: <span id="status">Unsubmitted</span></p>

              .invalid input:required:invalid {
    background: #BE4C54;

.invalid input:required:valid {
    background: #17D654 ;

input {
  display: block;
  margin-bottom: 10px;
              function hasHtml5Validation () {
  return typeof document.createElement('input').checkValidity === 'function';

if (hasHtml5Validation()) {
  $('.validate-form').submit(function (e) {
    if (!this.checkValidity()) {
    } else {
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