<form action="http://baidu.com">
<input type="text" placeholder="请输入用户名" required> <!-- 想兼容 Lable 做 for id-->
<input type="email" autofocus="true">
<input type="tel" pattern="\d{1,5}">
<input type="number">
<input type="text">
<input type="url">
<input type="search">
<input type="range" min="0" max="100" value="0" step="50">
<input type="color" id="c">
<input type="datetime">
<input type="datetime-local">
<input type="time">
<input type="date">
<input type="week">
<input type="month">
<input type="text" autocomplete="off">
<input type="submit" value="提交" formaction="http://jd.com" >
</form>
