<p>城市:
<select name="city">
<option value="zz">鄭州</option>
<option value="wh">武漢</option>
<option value="nj">南京</option>
<option value="sh" selected>上海</option>
</select>
</p>
<p>
<textarea name="textarea" cols="30" rows="10">文本內容</textarea>
</p>
<p>
<input type="file" name="files">
</p>
<p>郵箱:
<input type="email" name="email">
</p>
---------------------------------------------
<p>網址:
<input type="url" name="url">
</p>
---------------------------------------------
<p>商品數量:
<input type="number" name="number" max="100" min="0" step="10">
</p>
<p>音量:
<input type="range" name="voice" max="100" min="0" step="1">
</p>
<p>姓名:
<input type="text" name="username" value="admin" readonly>
</p>
------------------------------------------------------------------
<p>
<input type="reset" disabled>
</p>
------------------------------------------------------------------
<p>密碼:
<input type="password" name="pwd" value="123456" hidden>
</p>
------------------------------------------------------------------
<p>
<label for="mark">點擊</label>
<input type="text" id="mark">
</p>
<p>
<input type="text" name="username" placeholder="請輸入用戶名">
</p>
-------------------------------------------------------------------
<p>
<input type="text" name="username" required>
</p>
-------------------------------------------------------------------
<p>自定義郵箱驗證:
<input type="text" name="diyemail"
pattern="\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*">
</p>
placeholder提示信息 required非空判斷 pattern正則表達驗證