我无法完成这个 html5 表单验证。任何人请建议如何修复它。请参阅jsfiddle
当我在输入框中按任意键时,萤火虫控制台会说SyntaxError: invalid quantifier
<form action="#" method="post" class="form-validate" id="bidform">
<div class="input_wrapper">
<input placeholder="Enter Zip Code" type="text" pattern="[0-9]{3,5}"
oninvalid="setCustomValidity('Please enter valid zip')" id="zip" class="validate-numeric" required name="zip">
</div>
<div class="submit_row">
<input class="submit" value="Submit a Bid!" type="submit" name="subbid">
</div>
</form>