html5 header element tag html5New tag element
1. header Basic introduction to tag elements - TOP
Before the HTML5 version, it was customary to use div tags to layout web pages. In HTML5, a new header tag element is added based on the DIV tag. Also called "
It should be recognized by everyone that "header" is a commonly used name in html layout, so a new header tag element is added in HTML5. You can understand why the header is added as a label element in html5.
In addition to using the header tag directly, you can also set class or id to the header.
2. Syntax structure - TOP
The header tag element is used the same as div. There is a beginning and a closing.
Grammar:
1. Don’t give id or class directly
2. Set id
3. Set class
4. Features: Like the DIV tag element, it can be used multiple times, and id or class can be used to set different styles in different places.
3. Compatibility - TOP
Because the header tag is a new tag element in HTML5, it is not supported by older versions of browsers. It requires IE9+ or above browsers, the latest Google Chrome and other browsers. support. Of course, domestic browsers such as 360 Browser, Baidu Browser, and Aoyou Browser all use the IE kernel that comes with the system, so domestic browsers are actually the same version as the IE version that comes with your system, so you IE BrowserIn IE9 or above, it is naturally compatible with the new tag elements of HTML5.
4. Comparison case of old and new DIV layout - TOP
Observe and master the application of header by comparing DIV+CSS layout and HTML5+CSS layout.
1. DIVCSS5 instance HTML5+CSS complete code
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>html5 Header标签实例 DIVCSS5</title>
<style> /* 传统布局CSS */ #header{ width:300px; height:40px; background:#CCC} /* HTML5布局样式 */ header{ width:400px; height:70px; color:#F00; background:#F5F5F5} .color-000{ color:#000; background:#666} </style>
</head>
<body>
<div id="header">
我在传统div布局中
</div>
<header>
我在传统div布局中,必须在支持HTML5浏览器才能看到效果， 建议谷歌浏览器测试观察效果
</header>
<header class="color-000">
我颜色为黑色,背景为#666
</header>
</body>
</html>2. Effect screenshot
div and header layout effect screenshot
DIVCSS5 Special tip: The code is screenshotted in DW software, and the effects are rendered in PS on Google Chrome (supports HTML5) browser. Ordinary IE6-IE8 do not support HTML5 and cannot see the HTML5 layout effect. You need IE9 and above browsers to see the layout effect.
The above is the detailed content of html5
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如何使用PHP header()方法来调整网页Mar 28, 2023 pm 01:54 PMPHP是一种功能强大的编程语言，可以用来创建动态网站和Web应用程序。其中一个最强大的功能之一是PHP的header()方法。在本文中，我们将探讨如何使用PHP的header()方法来调整网页。
php header头怎么实现跳转Dec 02, 2022 am 09:14 AMphp header实现跳转的方法：1、使用“Header("Location:$url");”语法实现跳转；2、使用if判断式实现跳转，其跳转语句如“if($_COOKIE["u_type"]){ header('location:register.php'); } else{ setcookie('u_type','1','86400*360');”。
html5标签head和header有什么区别Jan 17, 2022 am 11:10 AM区别：1、head标签用于定义文档头部，它是所有头部元素的容器，而header标签用于定义文档的页眉（介绍信息）；2、浏览器都支持head标签，而旧版本浏览器均不支持header标签，需要IE9+以上浏览器才支持header标签。
html5怎么让头和尾固定不动Apr 25, 2022 pm 02:30 PM固定方法：1、使用header标签定义文档头部内容，并添加“position:fixed;top:0;”样式让其固定不动；2、使用footer标签定义尾部内容，并添加“position: fixed;bottom: 0;”样式让其固定不动。
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