HTML Form How to - Check validity of HTML5 forms with pattern








Question

We would like to know how to check validity of HTML5 forms with pattern.

Answer


<!DOCTYPE html>
<html>
<body>
  <form>
    <label> Part number: <input pattern="[0-9][A-Z]{3}"
      name="part"
      title="A part number is a digit followed by three uppercase letters." />
    </label>
    <button>submit</button>
  </form><!-- w  w w.j  ava  2 s .  c  o  m-->
</body>
</html>

The code above is rendered as follows: