HTML5必要的属性实例页面
代码：
HTML代码：
<form action="" method="get">
<label for="name">姓名:</label>
<input id="name" name="name" type="text" placeholder="zhangxinxu" required="required" />
<button type="submit">提交</button>
</form>
<form action="" method="get">
<label for="name">姓名:</label>
<input id="name" name="name" type="text" placeholder="zhangxinxu" required="required" />
<button type="submit">提交</button>
</form>