A detailed introduction to form components in HTML
HTMLForm component
1. Description
for Things in the m tag
2. Rendering
3. Code
<!DOCTYPE html>
<html>
<head>
<title>Form.html</title>
<meta name="keywords" content="keyword1,keyword2,keyword3">
<meta name="description" content="this is my page">
<meta name="content-type" content="text/html; charset=UTF-8">
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
</head>
<body>
This is my HTML page.
<br>
<form action="">
<!-- 必须要有name和value属性，不然服务器无法获取数据，name是组件的名字，
name是提交服务器是服务对这个数据的键值，value是这个组件的值
-->
输入名称：<input type="text" name="user" value=""><br />
输入密码：<input type="password" name="pwd" /><br />
<!-- checked是默认选择，默认选择女，用户少点一步，很方便，后面还有selected也是默认选择的意思 -->
选择性别：<input type="radio" name="sex" value="nan" />男
<input type="radio" name="sex" value="nv" checked="checked" />女<br />
选择技术：<input type="checkbox" name="tech" value="java" />JAVA
<input type="checkbox" name="tech" value="html" />HTML
<input type="checkbox" name="tech" value="css" />CSS <br />
<!-- 选择文件这个功能特别方便 -->
选择文件：<input type="file" name="file" /><br />
<!-- 图片组件，拥有提交功能 ，在我们需要用自制的提交按钮时用，毕竟默认的太丑 -->
一个图案：<input type="image" src="11.jpg"/><br />
<!-- 隐藏组件，数据用户不需要知道，但是可以将其提交到服务器，比如你算出来的数据 -->
隐藏组件：<input type="hidden" name="myke" value="nyvalue"/> <br />
<!-- 用于自定义功能的按钮组件,onclick="alert('有个按钮')",单双引号嵌套，alert弹出对话框 -->
一个按钮：<input type="button" value="有个按钮" onclick="alert('有个按钮')" /><br />
<!-- 上面是input组件，里面有10个属性，下面看select属性 -->
<select name="country">
<option value="none" >--选择国家--</option>
<option value="usa" >美国</option>
<option value="en" >英国</option>
<option value="cn" >中国</option>
</select>
<br />
<!-- textarea属性，比如说写个人简介的时候，贼好用 -->
<textarea rows="" cols="" name="text"></textarea>
<br />
<input type="reset" value="清除数据" /><br />
<input type="submit" value="提交数据"/><br />
</form>
</body>
</html>
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