<form action="1.php" method="post">
<fieldset>
<legend>表单legend>
<input type="text" name="title" />
<input type="text" name="content" />
fieldset>
<button>提交button>
form>
<form action="1.php" method="post">
<fieldset>
<legend>表单legend>
<label for="title">标题label>
<input type="text" name="title" id="title" />
<hr />
<label>
介绍
<input type="text" name="content" />
label>
fieldset>
<button>提交button>
form>
required size placeholder value
<form action="1.php" method="post">
<fieldset>
<legend>表单legend>
<label for="title">标题label>
<input type="text" name="title" id="title" required size="50" />
<hr />
<label>
网址
<input type="text" name="url" placeholder="必须有协议如http" />
label>
<label> 来源 <input type="text" name="source" value="后盾人" /> label>
fieldset>
<button>提交button>
form>
readonly
disabled
<input
readonly
disabled
value="后盾人"
type="text"
name="title"
id="title"
required
size="50"
/>
<form action="1.php" method="post">
<fieldset>
<legend>表单legend>
<label>
电话
<input type="tel" />
label>
<hr />
<label>
密码
<input type="password" />
label>
<hr />
<label>
邮箱
<input type="email" />
label>
<hr />
<label>
数值
<input type="number" />
label>
fieldset>
form>
<form action="1.php" method="post">
<fieldset>
<legend>表单legend>
<label>标题
<input type="hidden" name="token" value="ssdsfdssf" />
label>
fieldset>
<input type="submit" value="保存提交" name="put" />
<input type="submit" value="save" name="save" />
<button>提交button>
form>
<body>
<form action="1.php" method="post">
<fieldset>
<legend>表单legend>
<label>用户名
<input
type="text"
pattern="[A-z]{5}"
name="username"
oninvalid="valid('用户名不能小于5位')"
/>
label>
fieldset>
<button>提交button>
form>
<script>
function valid(message) {
alert(message);
}
script>
body>

<form action="1.php" method="post">
<fieldset>
<legend>表单legend>
<label>
介绍
<textarea
name="info"
cols="30"
rows="10"
placeholder="请输入介绍信息"
>
这是默认值
textarea>
label>
<label>
栏目
<select name="category[]">
<optgroup label="游戏">
<option value="1">原神option>
<option value="2">纸嫁衣option>
optgroup>
<optgroup label="开发">
<option value="1" selected>MYSQLoption>
<option value="2">LINUXoption>
optgroup>
select>
label>
fieldset>
<button>提交button>
form>
<form action="1.php" method="post">
<fieldset>
<legend>表单legend>
<input type="radio" checked name="sex" id="boy" value="boy" />
<label for="boy">男孩label>
<input type="radio" name="sex" id="girl" value="girl" />
<label for="girl">女孩label>
<hr />
<input type="checkbox" name="register[]" id="email" value="email" />
<label for="email">邮箱label>
<input type="checkbox" name="register[]" id="mobile" value="mobile" />
<label for="mobile">手机label>
fieldset>
<button>提交button>
form>

<form action="1.php" method="post" enctype="multipart/form-data">
<fieldset>
<legend>表单legend>
<input type="file" name="image[]" accept=".png,.jpg" multiple />
fieldset>
<button>提交button>
form>

实际开发中当然是使用第三方组件了!
<input type="date" name="date" min="2020-02-12" max=""/>
<input type="time" name = "time" />
<input type="week" name = "week"/>
<input type="datetime-local"/>
<input type="search" name="search" list="lesson"/>
<datalist id="lesson">
<option value="MYSQL">数据库管理option>
<option value="PHP">PHPoption>
<option value="XXX">XXXoption>
datalist>
<input type="text" autocomplete="off"/>
<input type="text" autocomplete="on"/>

<body>
<style>
.style1 {
list-style-type: lower-roman;
}
style>
<ol start="1" class="style1">
<li>phpli>
<li>cssli>
ol>
<ul class="style1">
<li>phpli>
<li>cssli>
ul>
<dl>
<dt>公司产品dt>
<dd>vivodd>
<dd>oppodd>
<dd>meizudd>
<dt>公司位置dt>
<dd>上海dd>
<dd>天津dd>
<dd>广州dd>
dl>
body>