Reset Invalid HTML5 Input State

Question

Validated inputs are not initially marked as invalid until the value changes. How to restore this initial state?

My problem is in the details: I have a simple order form. If the user clicks the "add item" button, I clone the first item and an empty input field. But since I use html5 validation, emptying makes them invalid.

This happens after clicking the "Add Product" button, even if the first set of fields is valid:

Demo: http://jsfiddle.net/WEHdp/ (view in Firefox):

<form action="/orders/preview" method="post">
  <div class="orderData">
    <input name="order[order_items_attributes][0][articleno]" pattern="[0-9]{4}" required /> /
    <input name="order[order_items_attributes][0][colorno]" pattern="[0-9]{3}" required />
    <div>
      <a href="#" class="removeOrder">Remove product</a>
      <a href="#" class="addOrder">Add product</a>
    </div>
  </div>
</form>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.js"></script>
<script>
$(document).ready(function() {
  $(".addOrder").live("click", function (event) {
    event.preventDefault();

    // Clone div
    $('.orderData:first').clone().insertAfter(".orderData:last");
    // Empty the fields
    $('.orderData:last input').val("");
  });

  $(".removeOrder").live("click", function (event) {
    event.preventDefault();
    if($('.orderData').size() > 1){
      $(this).parents('.orderData').remove();
    }
  });
});
</script>

Answer 1

, .

:

$(document).ready(function() {
  var firstCopy = $('.orderData:first').clone();
  $(".addOrder").live("click", function (event) {
    event.preventDefault();

    // Clone div
    firstCopy.clone().insertAfter(".orderData:last");
    // Empty the fields
    $('.orderData:last input').val("");
  });

  $(".removeOrder").live("click", function (event) {
    event.preventDefault();
    if($('.orderData').size() > 1){
      $(this).parents('.orderData').remove();
    }
  });
});

Answer 2

Html 5 validation , , required. , ​​ . , , (, ).

. :)