XHTML 笔记

最新推荐文章于 2024-04-24 10:43:14 发布

最新推荐文章于 2024-04-24 10:43:14 发布 · 149 阅读

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原文出自 http://www.w3schools.com 中的 XHTML 教程

XHTML 结合 HTML 和 XML。

XHTML 元素必须严格的嵌套。
XHTML 元素必须总是闭合的。
XHTML 元素必须是小写的。XHTML 文档必须有根元素。

所有的 XHTML 文档必须有 DOCTYPE 声明。
DOCTYPE 声明必须是 XHTML 文档的第一行。

有 3 种文档类型定义： STRICT TRANSITIONAL FRAMESET

xml 代码

<!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Frameset//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">

属性名称必须小写。
属性值必须用引号。
属性最简化被禁止。如，

xml 代码

<input type="checkbox" checked />

id 属性代替 name 属性。
单标签在末尾 / 之前有空格。例如：

xml 代码

<br />

XHTML 文档由三个主要的部分构成： DOCTYPE Head Body。
基本文档结构如下：

xml 代码

<!DOCTYPE ...>
<html>
<head>
<title>... </title>
</head>
<body> ... </body>
</html>

核心属性（不可用于 base， head， html， meta， param， script， style，和 title 元素）

Attribute	Value	Description
class	class_rule or style_rule	The class of the element
id	id_name	A unique id for the element
style	style_definition	An inline style definition
title	tooltip_text	A text to display in a tool tip

语言属性（不可用于 base， br， frame， frameset， hr， iframe， param，和 script 元素）

Attribute	Value	Description
dir	ltr \| rtl	Sets the text direction
lang	language_code	Sets the language code

键盘属性

Attribute	Value	Description
accesskey	character	Sets a keyboard shortcut to access an element
tabindex	number	Sets the tab order of an element

窗体事件（只有 body 和 frameset 元素可用）

Attribute	Value	Description
onload	script	Script to be run when a document loads
onunload	script	Script to be run when a document unloads

表单元素事件（只在表单元素中有效）

Attribute	Value	Description
onchange	script	Script to be run when the element changes
onsubmit	script	Script to be run when the form is submitted
onreset	script	Script to be run when the form is reset
onselect	script	Script to be run when the element is selected
onblur	script	Script to be run when the element loses focus
onfocus	script	Script to be run when the element gets focus

键盘事件（不可用于 base， bdo， br， frame， frameset， head， html， iframe， meta， param， script， style，和 title 元素）

Attribute	Value	Description
onkeydown	script	What to do when key is pressed
onkeypress	script	What to do when key is pressed and released
onkeyup	script	What to do when key is released

鼠标事件（不可用于 base， bdo， br， frame， frameset， head， html， iframe， meta， param， script， style，和 title 元素）

Attribute	Value	Description
onclick	script	What to do on a mouse click
ondblclick	script	What to do on a mouse doubleclick
onmousedown	script	What to do when mouse button is pressed
onmousemove	script	What to do when mouse pointer moves
onmouseover	script	What to do when mouse pointer moves over an element
onmouseout	script	What to do when mouse pointer moves out of an element
onmouseup	script	What to do when mouse button is released

HTTP 响应信息：

1xx: Information

Message:	Description:
100 Continue	Only a part of the request has been received by the server, but as long as it has not been rejected, the client should continue with the request
101 Switching Protocols	The server switches protocol

2xx: Successful

Message:	Description:
200 OK	The request is OK
201 Created	The request is complete, and a new resource is created
202 Accepted	The request is accepted for processing, but the processing is not complete
203 Non-authoritative Information
204 No Content
205 Reset Content
206 Partial Content

3xx: Redirection

Message:	Description:
300 Multiple Choices	A link list. The user can select a link and go to that location. Maximum five addresses
301 Moved Permanently	The requested page has moved to a new url
302 Found	The requested page has moved temporarily to a new url
303 See Other	The requested page can be found under a different url
304 Not Modified
305 Use Proxy
306 Unused	This code was used in a previous version. It is no longer used, but the code is reserved
307 Temporary Redirect	The requested page has moved temporarily to a new url

4xx: Client Error

Message:	Description:
400 Bad Request	The server did not understand the request
401 Unauthorized	The requested page needs a username and a password
402 Payment Required	You can not use this code yet
403 Forbidden	Access is forbidden to the requested page
404 Not Found	The server can not find the requested page
405 Method Not Allowed	The method specified in the request is not allowed
406 Not Acceptable	The server can only generate a response that is not accepted by the client
407 Proxy Authentication Required	You must authenticate with a proxy server before this request can be served
408 Request Timeout	The request took longer than the server was prepared to wait
409 Conflict	The request could not be completed because of a conflict
410 Gone	The requested page is no longer available
411 Length Required	The "Content-Length" is not defined. The server will not accept the request without it
412 Precondition Failed	The precondition given in the request evaluated to false by the server
413 Request Entity Too Large	The server will not accept the request, because the request entity is too large
414 Request-url Too Long	The server will not accept the request, because the url is too long. Occurs when you convert a "post" request to a "get" request with a long query information
415 Unsupported Media Type	The server will not accept the request, because the media type is not supported
416
417 Expectation Failed

5xx: Server Error

Message:	Description:
500 Internal Server Error	The request was not completed. The server met an unexpected condition
501 Not Implemented	The request was not completed. The server did not support the functionality required
502 Bad Gateway	The request was not completed. The server received an invalid response from the upstream server
503 Service Unavailable	The request was not completed. The server is temporarily overloading or down
504 Gateway Timeout	The gateway has timed out
505 HTTP Version Not Supported	The server does not support the "http protocol" version