代码示例:(标识:html_form_novalidate)
<!DOCTYPE html>
<html>
<body>

<h1>form novalidate 属性</h1>

<p>novalidate 属性指示提交表单时不对输入进行验证:</p>

<form action="/Index/Demo/demo_form.html" novalidate>
First name:<br>
<input type="text" name="firstname" value="Mickey">
<br>
Last name:<br>
<input type="text" name="lastname" value="Mouse">
<br><br>
<input type="submit" value="Submit">
</form> 

<p><b>注释:</b>Safari 10(或更早版本)不支持 form 标签的 novalidate 属性。</p>

</body>
</html>
运行结果: