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Found 236 pages:

# Page 标签和摘要
1 HTML：超文本标记语言 HTML, HTML5, Landing, Web, l10n:priority
HTML (超文本标记语言) 是最基本的 Web 构建块。它定义 Web 内容的含义和结构。HTML 外的其它技术，通常用于描述 Web 页面的外观/呈现 ( CSS ) 或功能/行为 ( JavaScript ).
2 Allowing cross-origin use of images and canvas Advanced, CORS, Canvas, HTML, Image, Reference, Security, Storage, data
HTML provides a crossorigin attribute for images that, in combination with an appropriate CORS header, allows images defined by the <img> element that are loaded from foreign origins to be used in a <canvas> as if they had been loaded from the current origin.
3 使用 CSS 将颜色应用到 HTML 元素 Beginner, CSS, CSS Colors, Guide, HTML, HTML Colors, HTML Styles, Styling HTML, color
采用 CSS , there are lots of ways to add color to your HTML 元素 to create just the look you want. This article is a primer introducing each of the ways CSS color can be used in HTML.
4 Block-level elements Beginner, Development, Guide, HTML, HTML5, Web
A Block-level element occupies the entire horizontal space of its parent element (container), and vertical space equal to the height of its contents, thereby creating a "block".
5 用于 HTML 的日期和时间格式 Date, Element, Format, HTML, ISO 8601, Input, Reference, String, Time, Week, datetime, datetime-local, del, ins, month, month-year, week-year
Certain HTML elements use date and/or time values. The formats of the strings that specify these values are described in this article.
6 全局属性 Attribute, HTML, Reference, Web
全局属性 are attributes common to all HTML elements; they can be used on all elements, though they may have no effect on some elements.
7 accesskey Global attributes, HTML, Reference, accesskey
accesskey global attribute provides a hint for generating a keyboard shortcut for the current element. The attribute value must consist of a single printable character (which includes accented and other characters that can be generated by the keyboard).
8 autocapitalize Autocapitalize, Global attributes, HTML, Reference
autocapitalize global attribute is an enumerated attribute that controls whether and how text input is automatically capitalized as it is entered/edited by the user.
9 class Global attributes, HTML, Reference
class global attribute is a space-separated list of the case-sensitive classes of the element. Classes allow CSS and Javascript to select and access specific elements via the class selectors or functions like the DOM method document.getElementsByClassName .
10 contenteditable Editing, Global attributes, HTML, Reference, Text Editing, contenteditable, text entry, text input
contenteditable global attribute is an enumerated attribute indicating if the element should be editable by the user. If so, the browser modifies its widget to allow editing.
11 contextmenu Deprecated, Global attributes, HTML, Reference, contextmenu
contextmenu global attribute 是 id 的 <menu> to use as the contextual menu for this element.
12 data-* Global attributes, HTML, Reference
data-* 全局属性 form a class of attributes called 自定义数据属性 , that allow proprietary information to be exchanged between the HTML 及其 DOM representation by scripts.
13 dir BiDi, Global attributes, HTML, Reference
dir global attribute is an enumerated attribute that indicates the directionality of the element's text.
14 draggable Global attributes, HTML, Reference
draggable global attribute is an enumerated attribute that indicates whether the element can be dragged, either with native browser behavior or the HTML 拖放 API .
15 dropzone Deprecated, Global attributes, HTML, Reference
dropzone global attribute is an enumerated attribute indicating what types of content can be dropped on an element, using the HTML 拖放 API . It can have the following values:
16 hidden Global attributes, HTML, Reference
hidden global attribute is a Boolean attribute indicating that the element is not yet, or is no longer, relevant . For example, it can be used to hide elements of the page that can't be used until the login process has been completed.
17 id Global attributes, HTML, Reference, Web, id
id global attribute defines an identifier (ID) which must be unique in the whole document. Its purpose is to identify the element when linking (using a fragment identifier ), scripting, or styling (with CSS ).
18 inputmode Attribute, Editing, Forms, Global attributes, HTML, Input, Reference, Text, Web, contenteditable, global, inputmode, text input
inputmode global attribute is an enumerated attribute that hints at the type of data that might be entered by the user while editing the element or its contents.
19 is Global attributes, HTML, Reference, is
is global attribute allows you to specify that a standard HTML element should behave like a defined custom built-in element (see Using custom elements 了解更多细节)。
20 itemid Attribute, Global attribute, HTML, HTML Microdata, Microdata, Reference, itemid
itemid global attribute provides microdata in the form of a unique, global identifier of an item.
21 itemprop Attribute, Global attribute, HTML, HTML Microdata, Microdata, Reference
itemprop global attribute is used to add properties to an item. Every HTML element can have an itemprop attribute specified, and an itemprop consists of a name-value pair. Each name-value pair is called a property , and a group of one or more properties forms an item . Property values are either a string or a URL and can be associated with a very wide range of elements including <audio> , <embed> , <iframe> , <img> , <link> , <object> , <source> , <track> ，和 <video> .
22 itemref Attribute, Global attribute, HTML, HTML Microdata, Microdata, Reference
Properties that are not descendants of an element with the itemscope attribute can be associated with an item using the global attribute itemref .
23 itemscope Attribute, Global attribute, HTML, HTML Microdata, Microdata, Reference
itemscope is a boolean global attribute that defines the scope of associated metadata. Specifying the itemscope attribute for an element creates a new item, which results in a number of name-value pairs that are associated with the element.
24 itemtype Attribute, Global attribute, HTML, HTML Microdata, Microdata, Reference
global attribute itemtype specifies the URL of the vocabulary that will be used to define itemprop 's (item properties) in the data structure.
25 lang Global attributes, HTML, Reference
lang global attribute helps define the language of an element: the language that non-editable elements are written in, or the language that the editable elements should be written in by the user. The attribute contains a single “language tag” in the format defined in Tags for Identifying Languages (BCP47) .
26 part Global attributes, HTML, Reference, part
part global attribute contains a space-separated list of the part names of the element. Part names allows CSS to select and style specific elements in a shadow tree via the ::part pseudo-element.
27 slot Global attributes, HTML, Reference
slot global attribute assigns a slot in a shadow DOM shadow tree to an element: An element with a slot attribute is assigned to the slot created by the <slot> element whose name attribute's value matches that slot attribute's value.
28 spellcheck Global attributes, HTML, Reference
spellcheck global attribute is an enumerated attribute defines whether the element may be checked for spelling errors.
29 style Global attributes, HTML, Reference
style global attribute 包含 CSS styling declarations to be applied to the element. Note that it is recommended for styles to be defined in a separate file or files. This attribute and the <style> element have mainly the purpose of allowing for quick styling, for example for testing purposes.
30 tabindex Global attributes, HTML, Reference
tabindex global attribute indicates that its element can be focused, and where it participates in sequential keyboard navigation (usually with the Tab key, hence the name).
31 title Global attributes, HTML, Reference, Title
title global attribute contains text representing advisory information related to the element it belongs to.
32 translate Experimental, Global attributes, HTML, Reference
translate global attribute is an enumerated attribute that is used to specify whether an element's translateable attribute values and its 文本 node children should be translated when the page is localized, or whether to leave them unchanged.
33 x-ms-acceleratorkey Attribute, HTML, HTML:Microsoft Extensions, Non-standard, Reference, x-ms-acceleratorkey
x-ms-acceleratorkey attribute accessibly declares that an accelerator key has been assigned to an element: the element is activated via JavaScript when the key(s) are pressed on a keyboard.
34 x-ms-format-detection Attribute, HTML, HTML:Microsoft Extensions, Non-standard, Reference, x-ms-format-detection
x-ms-format-detection attribute determines whether data formats within the element’s text, like phone numbers, are automatically converted to followable links.
35 HTML 属性参考 Attribute, Attributes, Beginner, Configuring, Element Attributes, Elements, HTML, Reference, Settings, Web
Elements in HTML have 属性 ; these are additional values that configure the elements or adjust their behavior in various ways to meet the criteria the users want.
36 HTML attribute: accept Accept, Attribute, File, HTML, Input, Reference
accept attribute takes as its value a comma-separated list of one or more file types, or unique file type specifiers , describing which file types to allow.
37 HTML attribute: capture API, Attribute, Attributes, Capture, Constraint validation, HTML
capture attribute specifies that, optionally, a new file should be captured, and which device should be used to capture that new media of a type defined by the accept 属性。 Values include user and environment .
38 HTML attribute: crossorigin Advanced, Attribute, CORS, HTML, NeedsContent, Reference, Security
The crossorigin attribute, valid on the <audio> , <img> , <link> , <script> ，和 <video> elements, provides support for CORS , defining how the element handles crossorigin requests, thereby enabling the configuration of the CORS requests for the element's fetched data. Depending on the element, the attribute can be a CORS settings attribute.
39 HTML attribute: max Attribute, Attributes, Constraint validation, HTML, Reference
max attribute defines the maximum value that is acceptable and valid for the input containing the attribute. If the value of the element is greater than this, the element fails constraint validation . This value must be greater than or equal to the value of the min attribute. If the max attribute is present by is not specified or is invalid, no max value is applied. If the max attribute is valid and a non-empty value is greater than the maximum allowed by the max attribute, constraint validation will prevent form submission.
40 HTML attribute: maxlength Attribute, Attributes, Constraint validation, HTML
maxlength attribute defines the maximum number of characters (as UTF-16 code units) the user can enter into an <input> or <textarea> . This must be an integer value 0 or higher.
41 HTML attribute: min Attribute, Attributes, Constraint validation, HTML, min
min attribute defines the minimum value that is acceptable and valid for the input containing the attribute. If the value of the element is less than this, the element fails constraint validation . This value must be less than or equal to the value of the max attribute. If a value is specified for min that isn't a valid number, the input has no minimum value.
42 HTML attribute: minlength Attribute, HTML, Input, Reference, minlength, textarea
minlength attribute defines the minimum number of characters (as UTF-16 code units) the user can enter into an <input> or <textarea> . This must be an integer value 0 or higher. If no minlength is specified, or an invalid value is specified, the input has no minimum length. This value must be less than or equal to the value of maxlength , otherwise the value will never be valid, as it is impossible to meet both criteria.
43 HTML attribute: multiple Attribute, Attributes, Constraint validation, HTML
The Boolean multiple attribute, if set, means the form control accepts one or more values. Valid for the email and file input types and the <select> , the manner by which the user opts for multiple values depends on the form control.
44 HTML attribute: pattern Attribute, Attributes, Constraint Validation API, HTML, Reference
pattern attribute specifies a regular expression the form control's value should match. If a non- null value doesn't conform to the constraints set by the pattern value, the ValidityState object's read-only patternMismatch property will be true.
45 HTML attribute: readonly Attribute, Attributes, Constraint validation, Forms, required
The Boolean readonly attribute, when present, makes the element not mutable, meaning the user can not edit the control.
46 HTML attribute: rel Attribute, Attributes, Constraint validation, Link, form, rel
rel attribute defines the relationship between a linked resource and the current document. Valid on <link> , <a> , <area> ，和 <form> , the supported values depend on the element on which the attribute is found.
47 HTML attribute: required Attribute, Attributes, Constraint validation, Forms, required
The Boolean required 属性
48 HTML attribute: size Attribute, HTML, Input, Reference, Select
size attribute defines the width of the <input> and the height of the <select> element. For the input , if the type 属性为 text or password then it's the number of characters. This must be an integer value 0 or higher. If no size is specified, or an invalid value is specified, the input has no size declared, and the form control will be the default width based on the user agent. If CSS targets the element with properties impacting the width, CSS takes precedence.
49 HTML attribute: step Attribute, Attributes, constrain validation, step
step attribute is a number that specifies the granularity that the value must adhere to or the keyword any . It is valid for the numeric input types, including the date , month , week , time , datetime-local , number and range 类型。
50 The HTML autocomplete attribute Addresses, Attribute, Email addresses, Forms, HTML, Input, Phone Numbers, Reference, Select, Text, Usernames, autocomplete, form, passwords, textarea
autocomplete lets web developers specify what if any permission the 用户代理 has to provide automated assistance in filling out form field values, as well as guidance to the browser as to the type of information expected in the field.
51 被禁用 Attribute, Attributes, Constraint validation, Forms, required
The Boolean 被禁用 attribute, when present, makes the element not mutable, focusable, or even submitted with the form. The user can neither edit nor focus on the control, nor its form control descendants.
52 HTML documentation index HTML, Index, MDN Meta
A comprehensive index list of all the available HTML documentation.
53 HTML 元素参考 Basic, Element, HTML, Reference, Web, l10n:priority
This page lists all the HTML 元素 ，创建是使用 tags .
54 <a>: The Anchor element Content, Element, HTML, HTML text-level semantics, HTML:Flow content, HTML:Interactive content, HTML:Palpable Content, HTML:Phrasing content, Inline element, Reference, Web
HTML <a> element (或 anchor 元素)，采用 its href 属性 , creates a hyperlink to web pages, files, email addresses, locations in the same page, or anything else a URL can address.
55 <abbr>: The Abbreviation element Acronym, Definitions, Element, HTML, HTML text-level semantics, HTML:Flow content, HTML:Palpable Content, HTML:Phrasing content, Reference, Web, abbr, abbreviation, semantics
HTML 缩写元素 ( <abbr> ) represents an abbreviation or acronym; the optional title attribute can provide an expansion or description for the abbreviation.
56 <acronym> Element, HTML, HTML:Flow content, Obsolete, Reference, Web
The HTML Acronym Element ( <acronym> ) allows authors to clearly indicate a sequence of characters that compose an acronym or abbreviation for a word.
57 <address>: The Contact Address element Address, Author, Contact, Contact Information, Element, Email, Email Address, HTML, HTML sections, HTML:Flow content, HTML:Palpable Content, Reference, Web
HTML <address> element indicates that the enclosed HTML provides contact information for a person or people, or for an organization.
58 <applet>: The Embed Java Applet element Element, HTML, Java, Obsolete, Reference, Web, applet
过时 HTML 小程序元素 ( <applet> ) embeds a Java applet into the document; this element has been deprecated in favor of <object> .
59 <area> Content, Element, HTML, HTML:Flow content, HTML:Phrasing content, Multimedia, Reference, Web
HTML <area> tag 在拥有预定义可点击区域的图像映射中定义区域。 图像映射 允许图像几何区域关联 超文本链接 .
60 <article>: The Article Contents element Element, HTML, HTML sections, Reference, Web
HTML <article> element represents a self-contained composition in a document, page, application, or site, which is intended to be independently distributable or reusable (e.g., in syndication).
61 <aside>: The Aside element Element, HTML, HTML sections, HTML5, HTML:Flow content, HTML:Palpable Content, HTML:Sectioning content, Reference, Web
HTML <aside> element represents a portion of a document whose content is only indirectly related to the document's main content.
62 <audio>: The Embed Audio element Audio, Element, HTML, HTML embedded content, HTML5, HTML:Embedded content, HTML:Flow content, HTML:Phrasing content, Media, Multimedia, Reference, Web, sound
HTML <audio> element is used to embed sound content in documents. It may contain one or more audio sources, represented using the src 属性或 <source> element: the browser will choose the most suitable one. It can also be the destination for streamed media, using a MediaStream .
63 <b>: The Bring Attention To element Attention, Element, HTML, HTML text-level semantics, HTML:Flow content, HTML:Palpable Content, HTML:Phrasing content, Reference, Web
HTML 注意力转移元素 ( <b> ) is used to draw the reader's attention to the element's contents, which are not otherwise granted special importance.
64 <base>: The Document Base URL element Element, HTML, HTML document metadata, HTML:Metadata content, Reference
HTML <base> element specifies the base URL to use for all relative URLs in a document.
65 <basefont> Element, Fonts, HTML, Layout, Obsolete, Reference, Style, Web, basefont
过时 HTML Base Font element ( <basefont> ) sets a default font face, size, and color for the other elements which are descended from its parent element.
66 <bdi>: The Bidirectional Isolate element BDI, BiDi, Directionality, Element, HTML, HTML text-level semantics, HTML:Flow content, HTML:Palpable Content, HTML:Phrasing content, Internationalization, Left-to-Right, Reference, Right-to-left, Text, Web, direction, i18n, ltr, rtl
HTML Bidirectional Isolate element ( <bdi> )  tells the browser's bidirectional algorithm to treat the text it contains in isolation from its surrounding text.
67 <bdo>: The Bidirectional Text Override element BiDi, Bidirectional Text, Element, HTML, HTML text-level semantics, HTML:Flow content, HTML:Palpable Content, HTML:Phrasing content, Left to Right, Reference, Right to Left, Text, Text Direction, Text Rendering, Web, ltr, rtl
HTML Bidirectional Text Override element ( <bdo> ) overrides the current directionality of text, so that the text within is rendered in a different direction.
68 <bgsound>: The Background Sound element (obsolete) Audio, Background Sound, Element, HTML, Internet Explorer, Non-standard, Obsolete, Reference, Web
The Internet Explorer only HTML Background Sound element ( <bgsound> ) sets up a sound file to play in the background while the page is used; use <audio> 代替。
69 <big>: The Bigger Text element Element, HTML, Obsolete, Reference, Web
过时 HTML Big Element ( <big> ) renders the enclosed text at a font size one level larger than the surrounding text ( medium becomes large ，例如)。
70 <blink>: The Blinking Text element (obsolete) Blink, Element, HTML, Obsolete, Reference, Web
HTML Blink Element ( <blink> ) is a non-standard element which causes the enclosed text to flash slowly.
71 <blockquote>: The Block Quotation element Blockquote, Element, HTML, HTML grouping content, HTML:Flow content, HTML:Palpable Content, HTML:Sectioning root, Quotations, Reference, Web
HTML <blockquote> 元素 (或 HTML 块引用元素 ) 指示封闭文本是扩展引号。通常，这通过缩进视觉呈现 (见 注意事项 了解如何改变它)。引用源 URL 的给定可以使用 cite 属性，而源的文本表示的给定可以使用 <cite> 元素。
72 <body>: The Document Body element Element, HTML, Reference, Sectioning Root Element, Sections, Web
HTML <body> 元素 represents the content of an HTML document. There can be only one <body> 元素在文档中。
73 <br>: The Line Break element Element, HTML, HTML text-level semantics, Reference, Web
HTML <br> element produces a line break in text (carriage-return). It is useful for writing a poem or an address, where the division of lines is significant.
74 <button>: The Button element Element, Forms, HTML, HTML forms, Reference, Web
HTML <button> element represents a clickable button, used to submit forms or anywhere in a document for accessible, standard button functionality.
75 <canvas>: The Graphics Canvas element Canvas, Element, HTML, HTML scripting, HTML5, Reference, Web
使用 HTML <canvas> element 采用 画布脚本 API 或 WebGL API 绘制图形和动画。
76 <caption>: The Table Caption element Element, HTML, HTML Tables, HTML tabular data, Reference, Table Captions, Table Titles, Tables, Web, caption
HTML <caption> element specifies the caption (or title) of a table.
77 <center>: The Centered Text element (obsolete) Element, HTML, Obsolete, Reference, Text, Text Alignment, Web, alignment, center
过时 HTML Center Element ( <center> ) 是 block-level element that displays its block-level or inline contents centered horizontally within its containing element.
78 <cite>: The Citation element Attribution, Citation, Citing References, Citing Works, Element, HTML, HTML text-level semantics, Quotations, Reference, Web
HTML 引文元素 ( <cite> ) is used to describe a reference to a cited creative work, and must include the title of that work.
79 <code>: The Inline Code element Code, Element, HTML, HTML text-level semantics, Inline Code, Reference, Web
HTML <code> element displays its contents styled in a fashion intended to indicate that the text is a short fragment of computer code.
80 <col> Element, HTML, HTML tabular data, Reference, Tables, Web
HTML <col> element defines a column within a table and is used for defining common semantics on all common cells. It is generally found within a <colgroup> 元素。
81 <colgroup> Element, HTML, HTML tabular data, Reference, Tables, Web
HTML <colgroup> element defines a group of columns within a table.
82 <command>: The HTML Command element Command, HTML, HTML commands, HTML5, HTML:Element, HTML:Element Reference, Obsolete
HTML Command element ( <command> ) represents a command which the user can invoke. Commands are often used as part of a context menu or toolbar.
83 <content>: The Shadow DOM Content Placeholder element (obsolete) Content, DOM, Deprecated, Element, HTML, HTML Web Components, Placeholder, Reference, Web, Web Components, shadow dom
HTML <content> element —an obsolete part of the Web 组件 suite of technologies—was used inside of Shadow DOM as an insertion point , and wasn't meant to be used in ordinary HTML.
84 <data> Element, HTML, HTML text-level semantics, Reference, Web
HTML <data> element links a given piece of content with a machine-readable translation. If the content is time- or date-related, the <time> element must be used.
85 <datalist>: The HTML Data List element Element, HTML, HTML forms, HTML5, Reference, Web
HTML <datalist> element contains a set of <option> elements that represent the permissible or recommended options available to choose from within other controls.
86 <dd>: The Description Details element Definition, Description Details, Element, HTML, HTML grouping content, Reference, Web, dd, description list, details
HTML <dd> element 提供描述、定义、或值为之前术语 ( <dt> ) 在描述列表 ( <dl> ).
87 <del>: The Deleted Text element Deleted Text, Element, HTML, HTML edits, Reference, Web, del
HTML <del> element 表示已从文档删除的文本范围。
88 <details>: The Details disclosure element Disclosure Box, Disclosure Widget, Element, HTML, HTML interactive elements, Reference, Web, details
HTML Details Element ( <details> ) creates a disclosure widget in which information is visible only when the widget is toggled into an "open" state.
89 <dfn>: The Definition element Definition, Definitions, Element, HTML, HTML text-level semantics, Reference, Semantic Markup, Web, dfn
HTML Definition element ( <dfn> ) is used to indicate the term being defined within the context of a definition phrase or sentence.
90 <dialog>: The Dialog element Dialog, Element, HTML, HTML interactive elements, Reference, Web, polyfill
HTML <dialog> element represents a dialog box or other interactive component, such as a dismissable alert, inspector, or subwindow.
91 <dir>: The Directory element (obsolete) Directory, Element, HTML, HTML Lists, Obsolete, Reference, Web, dir, lists
过时 HTML Directory element ( <dir> ) is used as a container for a directory of files and/or folders, potentially with styles and icons applied by the 用户代理 .
92 <div>: The Content Division element Content Division, Element, HTML, HTML grouping content, HTML:Flow content, Layout, Reference, Web, div
HTML 内容划分元素 ( <div> ) 是用于流式内容的一般容器。它对内容 (或布局) 不起作用，直到样式使用 CSS .
93 <dl>: The Description List element Element, HTML, HTML grouping content, HTML:Flow content, HTML:Palpable Content, Reference, Web
HTML <dl> element represents a description list. The element encloses a list of groups of terms (specified using the <dt> element) and descriptions (provided by <dd> elements). Common uses for this element are to implement a glossary or to display metadata (a list of key-value pairs).
94 <dt>: The Description Term element Definition, Definition List, Definition Term, Element, HTML, HTML grouping content, Reference, Term, dt, lists
HTML <dt> element specifies a term in a description or definition list, and as such must be used inside a <dl> 元素。
95 <element>: The Custom Element element (Obsolete) Element, HTML, Obsolete, Web Components, custom elements, shadow dom
过时 HTML <element> element was part of the Web 组件 specification; it was intended to be used to define new custom DOM elements.
96 <em>: The Emphasis element Element, HTML, HTML text-level semantics, Reference, Web
HTML <em> element marks text that has stress emphasis. The <em> element can be nested, with each level of nesting indicating a greater degree of emphasis.
97 <embed>: The Embed External Content element Element, Embedding Content, External content, HTML, HTML embedded content, HTML5, Plugins, Reference, Web, embed
HTML <embed> element embeds external content at the specified point in the document. This content is provided by an external application or other source of interactive content such as a browser plug-in.
98 <fieldset>: The Field Set element Element, Forms, HTML, HTML forms, Reference, Web
HTML <fieldset> element is used to group several controls as well as labels ( <label> ) within a web form.
99 <figcaption>: The Figure Caption element Element, HTML, HTML grouping content, Reference
HTML <figcaption> or Figure Caption element represents a caption or legend describing the rest of the contents of its parent <figure> 元素。
100 <figure>: The Figure with Optional Caption element Element, HTML, HTML grouping content, Information, Presentation, Reference, figure
HTML <figure> (具有可选标题的图形) 元素 represents self-contained content, potentially with an optional caption, which is specified using the ( <figcaption> ) 元素。
101 <font> Element, HTML, Obsolete, Reference, Web
HTML Font Element ( <font> ) defines the font size, color and face for its content.
102 <footer> Element, HTML, HTML sections, Reference
HTML <footer> element represents a footer for its nearest 区间内容 or 区间根 element. A footer typically contains information about the author of the section, copyright data or links to related documents.
103 <form> Element, Form Element, Forms, HTML, HTML Form Element, HTML forms, Reference, Web
HTML <form> element represents a document section containing interactive controls for submitting information.
104 <frame> Deprecated, Element, HTML, Reference, Web
<frame> is an HTML element which defines a particular area in which another HTML document can be displayed. A frame should be used within a <frameset> .
105 <frameset> Deprecated, Element, HTML, Reference, Web
HTML <frameset> element is used to contain <frame> 元素。
106 <h1>–<h6>: The HTML Section Heading elements Element, HTML, HTML sections, Reference, Web
HTML <h1> – <h6> 元素 represent six levels of section headings. <h1> is the highest section level and <h6> is the lowest.
107 <head>: The Document Metadata (Header) element Element, HTML, HTML document metadata, HTML:Metadata content, Reference, Web
HTML <head> element contains machine-readable information ( metadata ) about the document, like its title , 脚本 ，和 样式表 .
108 <header> Element, HTML, HTML sections, Reference
HTML <header> element represents introductory content, typically a group of introductory or navigational aids. It may contain some heading elements but also a logo, a search form, an author name, and other elements.
109 <hgroup> Element, Experimental, HTML, HTML sections, HTML5, Reference, Web
HTML <hgroup> element represents a multi-level heading for a section of a document. It groups a set of <h1>–<h6> 元素。
110 <hr>: The Thematic Break (Horizontal Rule) element Element, HTML, HTML grouping content, Reference
HTML <hr> element represents a thematic break between paragraph-level elements: for example, a change of scene in a story, or a shift of topic within a section.
111 <html>: The HTML Document / Root element Element, HTML, HTML Root Element, Reference, Web
HTML <html> element represents the root (top-level element) of an HTML document, so it is also referred to as the root element . All other elements must be descendants of this element.
112 manifest Cache, application cache
manifest attribute of <html> element specifies a URL of a application cache manifest that is downloaded in the early stages of page load.
113 <i>: The Idiomatic Text element Element, HTML, HTML text-level semantics, Reference, Web, em
HTML Idiomatic Text element ( <i> ) represents a range of text that is set off from the normal text for some reason, such as idiomatic text, technical terms, taxonomical designations, among others.
114 <iframe>: The Inline Frame element Content, Element, Embedded content, Embedding, Frames, HTML, HTML embedded content, Inline Frames, Reference, Web, embedded, iframe
HTML 内联框架元素 ( <iframe> ) 表示嵌套 浏览上下文 ，将另一 HTML 页面嵌入当前页面。
115 <image>: The obsolete Image element Element, HTML, HTML Element Reference, HTML Reference, HTML element, Non-standard, Obsolete, Reference
过时 HTML Image element ( <image> ) is an obsolete remnant of an ancient version of HTML lost in the mists of time; use the standard <img> element instead.
116 <img>: The Image Embed element Content, Element, Graphics, HTML, HTML Graphics, HTML Images, HTML Photos, HTML Pictures, HTML embedded content, Image, Image Element, Media, Multimedia, Photos, Pictures, Reference, Web
HTML <img> element 将图像嵌入文档。
117 <input>: The Input (Form Input) element Data entry, Element, Forms, HTML, HTML forms, HTML input tag, Input, MakeBrowserAgnostic, Reference, Web
HTML <input> element is used to create interactive controls for web-based forms in order to accept data from the user; a wide variety of types of input data and control widgets are available, depending on the device and 用户代理 .
118 <input type="button"> Element, Forms, HTML, HTML forms, Input, Input Element, Input Type, Reference, button
<input> elements of type button are rendered as simple push buttons, which can be programmed to control custom functionality anywhere on a webpage as required when assigned an event handler function (typically for the click event).
119 <input type="checkbox"> Element, HTML, HTML forms, Input, Input Types, Reference, checkbox, form
<input> elements of type checkbox are rendered by default as boxes that are checked (ticked) when activated, like you might see in an official government paper form. The exact appearance depends upon the operating system configuration under which the browser is running. Generally this is a square but it may have rounded corners. A checkbox allows you to select single values for submission in a form (or not).
120 <input type="color"> Color Picker, Element, Form input, Forms, HTML, HTML forms, HTML input, Input, Reference, color
<input> elements of type color provide a user interface element that lets a user specify a color, either by using a visual color picker interface or by entering the color into a text field in #rrggbb hexadecimal format.
121 <input type="date"> Date, Date picker, Element, Form Inputs, HTML, HTML forms, Input, Input Element, Input Type, Reference
<input> elements of type="date" create input fields that let the user enter a date, either with a textbox that validates the input or a special date picker interface.
122 <input type="datetime"> Element, HTML, HTML forms, Input, Input Element, Input Type, Obsolete, Reference, datetime
HTML <input type="datetime"> was a control for entering a date and time (hour, minute, second, and fraction of a second) as well as a timezone. This feature has been removed from WHATWG HTML , and is no longer supported in browsers.
123 <input type="datetime-local"> Date, Date and Time, Element, Form input, HTML, HTML forms, Input, Input Element, Input Type, Reference, Time, datetime-local
<input> elements of type datetime-local create input controls that let the user easily enter both a date and a time, including the year, month, and day as well as the time in hours and minutes.
124 <input type="email"> Email, Forms, HTML, HTML forms, Input Type, Reference
<input> elements of type email are used to let the user enter and edit an e-mail address, or, if the multiple attribute is specified, a list of e-mail addresses.
125 <input type="file"> Directory Picker, File, File Picker, Files, Form input, HTML, HTML forms, Input Type, Reference, Type
<input> elements with type="file" let the user choose one or more files from their device storage. Once chosen, the files can be uploaded to a server using form submission , or manipulated using JavaScript code and the File API .
126 <input type="hidden"> Element, Forms, HTML, HTML forms, Input, Input Types, Reference, hidden
<input> elements of type hidden let web developers include data that cannot be seen or modified by users when a form is submitted. For example, the ID of the content that is currently being ordered or edited, or a unique security token. Hidden inputs are completely invisible in the rendered page, and there is no way to make it visible in the page's content.
127 <input type="image"> Element, Form Image, Form Image Button, Forms, HTML, HTML Image Button, HTML forms, Image Button, Input, Input Type, Number, Reference
<input> elements of type image are used to create graphical submit buttons, i.e. submit buttons that take the form of an image rather than text.
128 <input type="month"> Date picker, Element, Form input, Forms, HTML, HTML forms, HTML input, Input, Input Element, Input Type, Number, Reference, month
<input> elements of type month create input fields that let the user enter a month and year allowing a month and year to be easily entered. The value is a string whose value is in the format " YYYY-MM ", where YYYY is the four-digit year and MM is the month number.
129 <input type="number"> Element, Forms, HTML, HTML forms, Input, Input Element, Input Type, Number, Reference
<input> elements of type 编号 are used to let the user enter a number. They include built-in validation to reject non-numerical entries.
130 <input type="password"> Element, Forms, HTML, HTML Input Types, HTML Inputs, HTML Password Input, HTML forms, HTML input tag, Input Types, Reference, Web, password
<input> elements of type password provide a way for the user to securely enter a password.
131 <input type="radio"> Choosing Options, Element, Form Options, HTML, HTML Input Types, HTML forms, HTML input, Input, Input Types, Options, Radio Buttons, Radio Groups, Reference, form, radio, radio button
<input> elements of type radio are generally used in radio groups —collections of radio buttons describing a set of related options.
132 <input type="range"> Element, Forms, HTML, HTML forms, HTML input tag, Input, Range, Reference, Web, slider
<input> elements of type range let the user specify a numeric value which must be no less than a given value, and no more than another given value. The precise value, however, is not considered important. This is typically represented using a slider or dial control rather than a text entry box like the number input type.
133 <input type="reset"> Element, Form Button, Form input, Forms, HTML, HTML forms, Input, Input Types, Reference, Reset Button, reset
<input> elements of type reset are rendered as buttons, with a default click event handler that resets all of the inputs in the form to their initial values.
134 <input type="search"> Form input, Forms, HTML, HTML forms, Input Type, Reference, Search
<input> elements of type search are text fields designed for the user to enter search queries into. These are functionally identical to text inputs, but may be styled differently by the 用户代理 .
135 <input type="submit"> Element, Form Button, Form input, HTML, HTML forms, Input, Input Types, Reference, Submit Form, button, form, submit, submit button
<input> elements of type submit are rendered as buttons. When the click event occurs (typically because the user clicked the button), the 用户代理 attempts to submit the form to the server.
136 <input type="tel"> Element, Form Inputs, Forms, HTML, HTML forms, HTML input, Input, Input Element, Input Type, Phone Numbers, Reference, Telephone Numbers, tel
<input> elements of type tel are used to let the user enter and edit a telephone number. Unlike <input type="email"> and <input type="url"> , the input value is not automatically validated to a particular format before the form can be submitted, because formats for telephone numbers vary so much around the world.
137 <input type="text"> Form input, Forms, HTML, HTML forms, Input, Input Type, Reference, Text, text entry, text input
<input> elements of type text create basic single-line text fields.
138 <input type="time"> Element, Forms, HTML, HTML Input Types, HTML forms, HTML input, Input, Input Element, Input Type, Reference, Time
<input> elements of type time create input fields designed to let the user easily enter a time (hours and minutes, and optionally seconds).
139 <input type="url"> Element, Form Control, Form Inputs, Forms, HTML, HTML Input Types, HTML forms, Input, Input Type, Reference, Text, URL, control
<input> elements of type url are used to let the user enter and edit a URL.
140 <input type="week"> Element, Forms, HTML, HTML Input Types, HTML forms, HTML input, Input, Input Element, Input Type, Input Types, Reference, Week, Weeks
<input> elements of type week create input fields allowing easy entry of a year plus the ISO 8601 week number during that year (i.e., week 1 to 52 or 53 ).
141 <ins> Element, HTML, HTML edits, Inserted Text, Insertion, Reference, Web, ins
HTML <ins> element 表示已添加到文档的文本范围。
142 <isindex> Deprecated, Element, HTML, Reference, Web
<isindex> was an obsolete HTML element that put a text field in a page for querying the document.
143 <kbd>: The Keyboard Input element Displaying Input, Displaying Keys, Displaying Keystrokes, Displaying User Input, Element, HTML, HTML text-level semantics, Keyboard Input, Keystroke, Reference, Web, keyboard, user input
HTML Keyboard Input element ( <kbd> ) represents a span of inline text denoting textual user input from a keyboard, voice input, or any other text entry device.
144 <keygen> Deprecated, Element, HTML, HTML5, Obsolete, Reference, Web
HTML <keygen> element exists to facilitate generation of key material, and submission of the public key as part of an HTML form . This mechanism is designed for use with Web-based certificate management systems. It is expected that the <keygen> element will be used in an HTML form along with other information needed to construct a certificate request, and that the result of the process will be a signed certificate.
145 <label> Element, Forms, HTML, HTML forms, Reference, Web
HTML <label> element represents a caption for an item in a user interface.
146 <legend> Element, Forms, HTML, HTML forms, Reference, Web
HTML <legend> element represents a caption for the content of its parent <fieldset> .
147 <li> Element, HTML, HTML grouping content, Reference
HTML <li> element 用于表示列表中的项。
148 <link>: The External Resource Link element Element, HTML, HTML document metadata, Link, Reference, Web, Web Performance, metadata
HTML External Resource Link element ( <link> ) specifies relationships between the current document and an external resource. This element is most commonly used to link to stylesheets , but is also used to establish site icons (both "favicon" style icons and icons for the home screen and apps on mobile devices) among other things.
149 <listing> Element, HTML, Obsolete, Reference, Web
HTML Listing Element ( <listing> ) renders text between the start and end tags without interpreting the HTML in between and using a monospaced font. The HTML 2 standard recommended that lines shouldn't be broken when not greater than 132 characters.
150 <main> Element, HTML, HTML sections, Reference, main
HTML <main> element represents the dominant content of the <body> of a document. The main content area consists of content that is directly related to or expands upon the central topic of a document, or the central functionality of an application.
151 <map> Element, HTML, HTML embedded content, Multimedia, Reference, Web
HTML <map> element 用于 <area> 元素以定义图像映射 (可点击的链接区域)。
152 <mark>: The Mark Text element Element, HTML, HTML text-level semantics, HTML5, Highlighting, Highlighting Text, Marking Text, Reference, Web, mark
HTML 标记文本元素 ( <mark> ) represents text which is marked or highlighted for reference or notation purposes, due to the marked passage's relevance or importance in the enclosing context.
153 <marquee>: The Marquee element (Obsolete) Element, HTML, Obsolete, Reference, Web, marquee
HTML <marquee> element is used to insert a scrolling area of text. You can control what happens when the text reaches the edges of its content area using its attributes.
154 <menu> Element, Experimental, HTML, HTML interactive elements, Navigation, Reference, Site Navigation, UI, UX, User Interface, User experience, Web, menu, menus
HTML <menu> element represents a group of commands that a user can perform or activate. This includes both list menus, which might appear across the top of a screen, as well as context menus , such as those that might appear underneath a button after it has been clicked.
155 <menuitem> Deprecated, Element, HTML, HTML5, Navigation, Navigation Menus, Reference, UI, UX, User Interface, User experience, Web, menuitem
HTML <menuitem> element represents a command that a user is able to invoke through a popup menu. This includes context menus, as well as menus that might be attached to a menu button.
156 <meta>: The Document-level Metadata element Document, Element, HTML, HTML charset, HTML document metadata, Reference, Web, charset, http-equiv, metadata
HTML <meta> element 表示 metadata that cannot be represented by other HTML meta-related elements, like <base> , <link> , <script> , <style> or <title> .
157 Standard metadata names Attribute, HTML, HTML document metadata, Reference, metadata
<meta> element can be used to provide document metadata in terms of name-value pairs, with the name attribute giving the metadata name, and the content attribute giving the value.
158 theme-color Attribute, HTML, HTML document metadata, Reference, metadata
theme-color value for the name 属性在 <meta> element indicates a suggested color that user agents should use to customize the display of the page or of the surrounding user interface. If specified, the content attribute must contain a valid CSS <color> .
159 <meter>: The HTML Meter element Element, HTML, HTML forms, HTML5, Reference, Web
HTML <meter> element represents either a scalar value within a known range or a fractional value.
160 <multicol>: The HTML Multi-Column Layout element (Obsolete) Element, HTML, Non-standard, Obsolete, Reference, multicol
HTML Multi-Column Layout element ( <multicol> ) was an experimental element designed to allow multi-column layouts and must not be used.
161 <nav>: The Navigation Section element Element, HTML, HTML sections, Links, Navigation, Reference, Sections, Web, nav
HTML <nav> element represents a section of a page whose purpose is to provide navigation links, either within the current document or to other documents. Common examples of navigation sections are menus, tables of contents, and indexes.
162 <nextid>: The NeXT ID element (Obsolete) Element, HTML, Obsolete, Reference, Web
<nextid> is an obsolete HTML element that served to enable the NeXT web designing tool to generate automatic NAME labels for its anchors.
163 <nobr>: The Non-Breaking Text element (obsolete) Element, HTML, Non-standard, Obsolete, Reference, Web, nobr
The non-standard, obsolete HTML <nobr> element prevents the text it contains from automatically wrapping across multiple lines, potentially resulting in the user having to scroll horizontally to see the entire width of the text.
164 <noembed>: The Embed Fallback element (Obsolete) Element, Embedded content, Embedding, HTML, Non-standard, Obsolete, Reference, noembed
<noembed> element is an obsolete, non-standard way to provide alternative, or "fallback", content for browsers that do not support the <embed> element or do not support the type of embedded content an author wishes to use.
165 <noframes>: The Frame Fallback element Element, Frames, HTML, HTML frames, Obsolete, Reference, Web, noframes
The obsolete HTML No Frames or frame fallback element, <noframes> , provides content to be presented in browsers that don't support (or have disabled support for) the <frame> 元素。
166 <noscript> Element, HTML, HTML scripting, Reference, Web
HTML <noscript> element defines a section of HTML to be inserted if a script type on the page is unsupported or if scripting is currently turned off in the browser.
167 <object> Element, HTML, HTML embedded content, Reference, Web
HTML <object> element represents an external resource, which can be treated as an image, a nested browsing context, or a resource to be handled by a plugin.
168 <ol>: The Ordered List element Element, HTML, HTML grouping content, HTML:Flow content, Reference
HTML <ol> element represents an ordered list of items — typically rendered as a numbered list.
169 <optgroup> Element, Forms, HTML, HTML forms, Reference, Web
HTML <optgroup> element creates a grouping of options within a <select> 元素。
170 <option>: The HTML Option element Element, Forms, HTML, HTML forms, Reference, Select
HTML <option> element is used to define an item contained in a <select> ， <optgroup> ，或 <datalist> element. As such, <option> can represent menu items in popups and other lists of items in an HTML document.
171 <output>: The Output element Element, HTML, HTML forms, HTML5, HTML:Flow content, Reference, Web
HTML Output element ( <output> ) is a container element into which a site or app can inject the results of a calculation or the outcome of a user action.
172 <p>: The Paragraph element Element, HTML, HTML grouping content, Reference, Web
HTML <p> element 表示段落。
173 <param>: The Object Parameter element Element, HTML, HTML embedded content, Reference, Web
HTML <param> element 定义参数为 <object> 元素。
174 <picture>: The Picture element Element, Graphics, HTML, HTML embedded content, Images, Reference, Web, WebP, picture
HTML <picture> element 包含零个或多个 <source> 元素和一个 <img> element to offer alternative versions of an image for different display/device scenarios.
175 <plaintext>: The Plain Text element (Deprecated) Element, HTML, Obsolete, Plain text, Reference, Web, plaintext
HTML Plaintext Element ( <plaintext> ) renders everything following the start tag as raw text, ignoring any following HTML.
176 <pre>: The Preformatted Text element Element, HTML, HTML grouping content, HTML:Flow content, Reference, Web
HTML <pre> element represents preformatted text which is to be presented exactly as written in the HTML file.
177 <progress>: The Progress Indicator element Element, HTML, HTML forms, HTML5, Reference, Web
HTML <progress> element displays an indicator showing the completion progress of a task, typically displayed as a progress bar.
178 <q>: The Inline Quotation element Citation, Cite, Element, HTML, HTML text-level semantics, Q, Quotation, Quotation Marks, Reference, Web, quote
HTML <q> element indicates that the enclosed text is a short inline quotation. Most modern browsers implement this by surrounding the text in quotation marks.
179 <rb>: The Ruby Base element Element, HTML, HTML text-level semantics, Reference, Ruby, Text, Web
HTML Ruby 基 ( <rb> ) element is used to delimit the base text component of a <ruby> annotation, i.e. the text that is being annotated.
180 <rp>: The Ruby Fallback Parenthesis element Element, HTML, HTML text-level semantics, Reference, Ruby, Text, Web
HTML Ruby Fallback Parenthesis ( <rp> ) element is used to provide fall-back parentheses for browsers that do not support display of ruby annotations using the <ruby> 元素。
181 <rt>: The Ruby Text element Element, HTML, HTML text-level semantics, Reference, Ruby, Text, Web
HTML Ruby Text ( <rt> ) element specifies the ruby text component of a ruby annotation, which is used to provide pronunciation, translation, or transliteration information for East Asian typography. The <rt> element must always be contained within a <ruby> 元素。
182 <rtc>: The Ruby Text Container element Element, HTML, HTML text-level semantics, NeedsContent, Reference, Ruby Text, Text, Web, rtc
HTML Ruby 文本容器 ( <rtc> ) element embraces semantic annotations of characters presented in a ruby of <rb> elements used inside of <ruby> 元素。 <rb> elements can have both pronunciation ( <rt> ) and semantic ( <rtc> ) annotations.
183 <ruby> Element, HTML, HTML text-level semantics, Reference, Web
HTML <ruby> element represents small annotations that are rendered above, below, or next to base text, usually used for showing the pronunciation of East Asian characters. It can also be used for annotating other kinds of text, but this usage is less common.
184 <s> Element, HTML, HTML text-level semantics, Reference, Web, text-decoration
HTML <s> element renders text with a strikethrough, or a line through it. Use the <s> element to represent things that are no longer relevant or no longer accurate. However, <s> is not appropriate when indicating document edits; for that, use the <del> and <ins> elements, as appropriate.
185 <samp>: The Sample Output element Element, HTML, HTML text-level semantics, Inline Sample, Reference, Sample Output, Sample Text, Web
HTML Sample Element ( <samp> ) is used to enclose inline text which represents sample (or quoted) output from a computer program.
186 <script>: The Script element Element, HTML, HTML scripting, HTML:Flow content, HTML:Metadata content, HTML:Phrasing content, HTML:Script-supporting element, Reference, Script, Web, tag
HTML <script> element is used to embed executable code or data; this is typically used to embed or refer to JavaScript code.
187 <section>: The Generic Section element Element, HTML, HTML sections, Reference, Section, Web
HTML <section> element represents a standalone section — which doesn't have a more specific semantic element to represent it — contained within an HTML document.
188 <select>: The HTML Select element Element, Forms, HTML, HTML forms, Reference, Web
HTML <select> element represents a control that provides a menu of options
189 <shadow>: The obsolete Shadow Root element Deprecated, Element, HTML, HTML Web Components, Reference, Shadow Root, Web Components, shadow, shadow dom
HTML <shadow> element —an obsolete part of the Web 组件 technology suite—was intended to be used as a shadow DOM insertion point .
190 <slot> Element, HTML, HTML Web Components, Reference, Web Components, shadow dom, slot
HTML <slot> element —part of the Web 组件 technology suite—is a placeholder inside a web component that you can fill with your own markup, which lets you create separate DOM trees and present them together.
191 <small>: the side comment element Element, HTML, HTML text-level semantics, Reference, Web, font-size
HTML <small> element represents side-comments and small print, like copyright and legal text, independent of its styled presentation. By default, it renders text within it one font-size smaller, such as from small to x-small .
192 <source>: The Media or Image Source element Element, HTML, HTML embedded content, Media, Reference, Web, Web Performance
HTML <source> element 指定多媒体资源为 <picture> ， <audio> 元素，或 <video> 元素。
193 <spacer> Element, HTML, Obsolete, Reference, Web
<spacer> is an obsolete HTML element which allowed insertion of empty spaces on pages. It was devised by Netscape to accomplish the same effect as a single-pixel layout image, which was something web designers used to use to add white spaces to web pages without actually using an image. However, <spacer> no longer supported by any major browser and the same effects can now be achieved using simple CSS.
194 <span> Element, HTML, HTML text-level semantics, HTML:Flow content, Reference, Web
HTML <span> element is a generic inline container for phrasing content, which does not inherently represent anything. It can be used to group elements for styling purposes (using the class or id attributes), or because they share attribute values, such as lang .
195 <strike> Element, HTML, Obsolete, Reference, Web
HTML <strike> element (或 HTML Strikethrough Element ) places a strikethrough (horizontal line) over text.
196 <strong>: The Strong Importance element Element, HTML, HTML text-level semantics, HTML:Flow content, HTML:Palpable Content, HTML:Phrasing content, Reference, Strong Importance, Urgency, Web, strong
HTML Strong Importance Element ( <strong> ) indicates that its contents have strong importance, seriousness, or urgency. Browsers typically render the contents in bold type.
197 <style>: The Style Information element CSS, Element, HTML, HTML document metadata, Reference, Style, Web
HTML <style> element contains style information for a document, or part of a document.
198 <sub>: The Subscript element Baseline, Element, Footnotes, HTML, HTML text-level semantics, HTML:Flow content, HTML:Palpable Content, HTML:Phrasing content, Reference, Subscript, Web, sub
HTML Subscript element ( <sub> ) specifies inline text which should be displayed as subscript for solely typographical reasons.
199 <summary>: The Disclosure Summary element Disclosure Box, Disclosure Control, Disclosure Summary, Element, HTML, HTML interactive elements, Reference, Summary, Web
HTML Disclosure Summary element ( <summary> ) element specifies a summary, caption, or legend for a <details> element's disclosure box.
200 <sup>: The Superscript element Element, HTML, HTML text-level semantics, HTML:Flow content, HTML:Palpable Content, HTML:Phrasing content, Reference, Web
HTML Superscript element ( <sup> ) specifies inline text which is to be displayed as superscript for solely typographical reasons.
201 <table>: The Table element Element, HTML, HTML tabular data, NeedsLiveSample, Reference, Sorting, Tables, Web
HTML <table> element represents tabular data — that is, information presented in a two-dimensional table comprised of rows and columns of cells containing data.
202 <tbody>: The Table Body element Element, HTML, HTML tabular data, Reference, Table Body, Table Contents, Tables, Web, tbody
HTML Table Body element ( <tbody> ) encapsulates a set of table rows ( <tr> elements), indicating that they comprise the body of the table ( <table> ).
203 <td>: The Table Data Cell element Cells, Data Cell, Element, HTML, HTML tabular data, Reference, Table Cell, Table Data, Tables, Web, cell, data, td
HTML <td> element defines a cell of a table that contains data. It participates in the 表格模型 .
204 <template>: The Content Template element Element, HTML, HTML Web Components, HTML:Flow content, HTML:Metadata content, HTML:Phrasing content, HTML:Script-supporting element, Reference, Template, Web, Web Components
HTML 内容模板 ( <template> ) element is a mechanism for holding HTML that is not to be rendered immediately when a page is loaded but may be instantiated subsequently during runtime using JavaScript.
205 <textarea> Element, Forms, HTML, HTML forms, Reference, Web, textarea
HTML <textarea> element represents a multi-line plain-text editing control, useful when you want to allow users to enter a sizeable amount of free-form text, for example a comment on a review or feedback form.
206 <tfoot>: The Table Foot element Element, HTML, HTML tabular data, Reference, Tables, Web
HTML <tfoot> element defines a set of rows summarizing the columns of the table.
207 <th> Element, HTML, HTML tabular data, Heading Cell, Reference, Table Cell, Table Head, Table Header, Table Heading, Table Heading Cell, Tables, Web, cell
HTML <th> element defines a cell as header of a group of table cells. The exact nature of this group is defined by the scope and headers 属性。
208 <thead>: The Table Head element Element, HTML, HTML tabular data, Reference, Tables, Web
HTML <thead> element defines a set of rows defining the head of the columns of the table.
209 <time> Element, HTML, HTML text-level semantics, HTML5, HTML:Flow content, HTML:Palpable Content, HTML:Phrasing content, Reference, Web
HTML <time> element represents a specific period in time.
210 <title>: The Document Title element Element, HTML, HTML document metadata, HTML:Metadata content, Page Name, Page Title, Reference, Tab Name, Tab Title, Title, Web, Window Name, Window Title
HTML 标题元素 ( <title> ) defines the document's title that is shown in a 浏览器 的标题栏 (或页面选项卡)。
211 <tr>: The Table Row element Element, HTML, HTML tabular data, Reference, Tables, Web, tag, tr, tr tag
HTML <tr> element defines a row of cells in a table. The row's cells can then be established using a mix of <td> (data cell) and <th> (header cell) elements.
212 <track>: The Embed Text Track element Accessibility, Cues, Element, HTML, HTML embedded content, HTML5, Multimedia, Reference, TextTrack, Web, a11y, track
HTML <track> element is used as a child of the media elements, <audio> and <video> . It lets you specify timed text tracks (or time-based data), for example to automatically handle subtitles.
213 <tt>: The Teletype Text element (obsolete) Element, HTML, Monospace, Monotype, Non-proportional Type, Obsolete, Reference, Teletype, Teletype Text, Web, font-family, tt
过时 HTML Teletype Text element ( <tt> ) creates inline text which is presented using the user agent's default monospace font face.
214 <u>: The Unarticulated Annotation (Underline) element Annotation, Element, HTML, HTML text-level semantics, HTML:Flow content, HTML:Palpable Content, HTML:Phrasing content, Reference, Unarticulated Annotation, Underline, Web
HTML Unarticulated Annotation element ( <u> ) represents a span of inline text which should be rendered in a way that indicates that it has a non-textual annotation.
215 <ul>: The Unordered List element Element, HTML, HTML grouping content, Reference
HTML <ul> element represents an unordered list of items, typically rendered as a bulleted list.
216 <var>: The Variable element Element, HTML, HTML text-level semantics, HTML:Flow content, HTML:Palpable Content, HTML:Phrasing content, Reference, Web, var, variable
HTML Variable element ( <var> ) represents the name of a variable in a mathematical expression or a programming context.
217 <video>: The Video Embed element Element, HTML, HTML Video, HTML Video Player, HTML embedded content, HTML5, Media, Movie Playback, Movies, Multimedia, Playing Movies, Playing Video, Reference, Showing Video, Video, Web
HTML Video element ( <video> ) embeds a media player which supports video playback into the document. You can use <video> for audio content as well, but the <audio> element may provide a more appropriate user experience.
218 <wbr> Element, HTML, HTML text-level semantics, Reference, Web
HTML <wbr> element represents a word break opportunity—a position within text where the browser may optionally break a line, though its line-breaking rules would not otherwise create a break at that location.
219 <xmp> Element, HTML, Obsolete, Reference, Web
HTML Example Element ( <xmp> ) renders text between the start and end tags without interpreting the HTML in between and using a monospaced font. The HTML2 specification recommended that it should be rendered wide enough to allow 80 characters per line.
220 HTML 参考 HTML, Landing, Reference, Web
This HTML 参考描述所有 元素 and 属性 为 HTML，包括 全局属性 that apply to all elements.
221 内联元素 Beginner, Elements, HTML, HTML Elements, HTML:Element Reference, Layout, Reference
Inline elements are those which only occupy the space bounded by the tags defining the element, instead of breaking the flow of the content.
222 Link 类型 Attribute, HTML, Link, Link types, Reference
In HTML, link types indicate the relationship between two documents, in which one links to the other using an <a> , <area> , <form> ，或 <link> 元素。
223 Link types: dns-prefetch Attribute, HTML, Link, Link types, Reference
dns-prefetch keyword for the rel 属性在 <link> element is a hint to browsers that the user is likely to need resources from the target resource's origin, and therefore the browser can likely improve the user experience by preemptively performing DNS resolution for that origin.
224 Link types: manifest App, Attribute, HTML, Link, Link types, Manifest, Reference
manifest keyword for the rel 属性在 <link> element indicates that the target resource is a Web app manifest .
225 Link types: modulepreload Attribute, HTML, Link, Link types, Reference
modulepreload keyword for the rel 属性在 <link> element provides a declarative way to preemptively fetch a module script and its dependencies, and store them in the document's module map for later evaluation.
226 Link types: noopener Attribute, HTML, Link types, Reference
noopener keyword for the rel 属性在 <a> , <area> ，和 <form> elements instructs the browser to navigate to the target resource without granting the new browsing context access to the document that opened it — by not setting the Window.opener property on the opened window (it returns null ).
227 Link types: noreferrer Attribute, HTML, Link types, Reference
noreferrer keyword for the rel 属性在 <a> , <area> ，和 <form> elements instructs the browser, when navigating to the target resource, to omit the Referer header and otherwise leak no referrer information — and additionally to behave as if the noopener keyword were also specified.
228 Link types: preconnect Attribute, HTML, Link, Link types, Reference
preconnect keyword for the rel 属性在 <link> element is a hint to browsers that the user is likely to need resources from the target resource's origin, and therefore the browser can likely improve the user experience by preemptively initiating a connection to that origin.
229 Link types: prefetch Attribute, HTML, Link, Link types, Reference
prefetch keyword for the rel 属性在 <link> element is a hint to browsers that the user is likely to need the target resource for future navigations, and therefore the browser can likely improve the user experience by preemptively fetching and caching the resource.
230 Link types: preload Attribute, HTML, Link, Link types, Reference
preload keyword for the rel 属性在 <link> element indicates the user is highly likely to require the target resource for the current navigation, and therefore the browser must preemptively fetch and cache the resource.
231 Link types: prerender Attribute, HTML, Link, Link types, Reference
prerender keyword for the rel 属性在 <link> element is a hint to browsers that the user might need the target resource for the next navigation, and therefore the browser can likely improve the user experience by preemptively fetching and processing the resource — for example, by fetching its subresources or performing some rendering in the background offscreen.
232 Microdata Composing, Example, HTML, Microdata, Reference, SEO, Search
Microdata is part of the WHATWG HTML Standard and is used to nest metadata within existing content on web pages. Search engines and web crawlers can extract and process microdata from a web page and use it to provide a richer browsing experience for users. Search engines benefit greatly from direct access to this structured data because it allows search engines to understand the information on web pages and provide more relevant results to users. Microdata uses a supporting vocabulary to describe an item and name-value pairs to assign values to its properties. Microdata is an attempt to provide a simpler way of annotating HTML elements with machine-readable tags than the similar approaches of using RDFa and classic microformats.
233 Microformats Composing, HTML, Microformats, NeedsContent, NeedsMarkupWork, Reference, SEO, Search
Microformats (sometimes abbreviated μF ) are standards used to embed semantics & structured data in HTML, and provide an API to be used by search engines, aggregators, and other tools. These minimal patterns of HTML are used for marking up entities that range from fundamental to domain-specific information, such as people, organizations, events, and locations. Microformats use supporting vocabularies to describe objects and name-value pairs to assign values to their properties. The properties are carried in class attributes that can be added to any HTML element, while the data values re-use HTML element content and semantic attributes. Microformats2 is an update to microformats that provides a simpler way of annotating HTML structured syntax & vocabularies than previous approaches of using RDFa and microdata which require learning new attributes.
234 采用 rel="preload" 预加载内容 Guide, HTML, JavaScript, Link, Media, Performance, Web Performance, as, preload, rel
preload value of the <link> 元素的 rel attribute lets you declare fetch requests in the HTML's <head> , specifying resources that your page will need very soon, which you want to start loading early in the page lifecycle, before browsers' main rendering machinery kicks in.
235 Quirks Mode and Standards Mode Gecko, Guide, HTML, NeedsUpdate, Web Development, Web Standards, XHTML
In the old days of the web, pages were typically written in two versions: One for Netscape Navigator, and one for Microsoft Internet Explorer. When the web standards were made at W3C, browsers could not just start using them, as doing so would break most existing sites on the web. Browsers therefore introduced two modes to treat new standards compliant sites differently from old legacy sites.
236 Using the application cache Advanced, App, Cache, Guide, HTML, appcache, application cache, web cache
HTML5 提供 application caching mechanism that lets web applications run offline. This Application Cache ( AppCache ) interface lists resources that browsers should cache to be available offline. Applications that are cached load and work correctly offline, even if users press the Refresh button.
A comprehensive index list of all the available HTML documentation.

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