Tags that can be omitted
Tags that do not allow closing tags: area (defines the area in the image map), base (specifies the default address or default target for all links on the page) , br, col (define attribute values for one or more columns in the table), embed (define embedded content, such as plug-in-5), hr, img, input, keygen, link, meta, param, source, track, wbr
Tags that can omit the end tag: li, dt, dd, p, rt, optgroup, option, colgroup, thread, tbody, tr, td, th
Tags that can be completely omitted: html, head, body , colgroup, tbody
New tag
section: A content block in the page, which can be included in a chapter, page, footer or other part of the page, and can be combined with h1, h2.. . and other tags are used in combination to represent the document structure.
article: Represents an independent piece of content on the page that has nothing to do with the context, such as an article.
aside: Define content other than article. The content of aside should be related to the content of article.
header: The title of the content block in the page or the entire page.
footer: The content block in the page or the footer of the entire page.
hgroup: Group the content blocks in the page or the titles of the entire page.
nav: Part of the navigation link.
figure: Specifies independent flow content (images, charts, photos, code, etc., the content should be related to the main content, but if deleted, it should not have an impact on the document flow).
video: video. exp:
audio:Audio.
embed: Used to embed content (including various media).
mark:Change color, pay attention.
progress: progress bar. exp:
time: Defines the date or time, or both. This tag is used by the search engine. The engine will know based on this tag that this block represents a time. There is an attribute named pubdate. When the engine reads it, it will know that the value in datatime in this block is the publication time of this article, and there are two special characters T and Z in this time. T represents the separator of date and time, and Z represents the standard format of time. exp:
datalist: Define the option list. Use this element in conjunction with an input element to define the possible values of the input. exp:
output:exp:
Global properties
data-type: Custom attributes.
hidden: hidden, single label.
spellcheck: Correct the grammar of the input content. exp:
tabindex:tab key order.
contenteditable: Modify the content. exp:
Make the entire text editable: <script>window.document.designMode="off";</script>//offClose , on: editable
The above is the content of HTML5 tags. For more related content, please pay attention to the PHP Chinese website (www.php.cn)!
Related articles:
The definition and regulations of each tag in HTML5: header
Detailed explanation of how to use HTML5 tags
Example introduction to the difference between HTML5 tags and HTML4 tags

html5的div元素默认一行不可以放两个。div是一个块级元素,一个元素会独占一行,两个div默认无法在同一行显示;但可以通过给div元素添加“display:inline;”样式,将其转为行内元素,就可以实现多个div在同一行显示了。

html5中列表和表格的区别:1、表格主要是用于显示数据的,而列表主要是用于给数据进行布局;2、表格是使用table标签配合tr、td、th等标签进行定义的,列表是利用li标签配合ol、ul等标签进行定义的。

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。

HTML5中画布标签是“<canvas>”。canvas标签用于图形的绘制,它只是一个矩形的图形容器,绘制图形必须通过脚本(通常是JavaScript)来完成;开发者可利用多种js方法来在canvas中绘制路径、盒、圆、字符以及添加图像等。

html5中不支持的标签有:1、acronym,用于定义首字母缩写,可用abbr替代;2、basefont,可利用css样式替代;3、applet,可用object替代;4、dir,定义目录列表,可用ul替代;5、big,定义大号文本等等。

html5废弃了dir列表标签。dir标签被用来定义目录列表,一般和li标签配合使用,在dir标签对中通过li标签来设置列表项,语法“<dir><li>列表项值</li>...</dir>”。HTML5已经不支持dir,可使用ul标签取代。

html5是指超文本标记语言(HTML)的第五次重大修改,即第5代HTML。HTML5是Web中核心语言HTML的规范,用户使用任何手段进行网页浏览时看到的内容原本都是HTML格式的,在浏览器中通过一些技术处理将其转换成为了可识别的信息。HTML5由不同的技术构成,其在互联网中得到了非常广泛的应用,提供更多增强网络应用的标准机。

3种取消方法:1、给td元素添加“border:none”无边框样式即可,语法“td{border:none}”。2、给td元素添加“border:0”样式,语法“td{border:0;}”,将td边框的宽度设置为0即可。3、给td元素添加“border:transparent”样式,语法“td{border:transparent;}”,将td边框的颜色设置为透明即可。


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