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css-schema.xml
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<?xml version="1.0" encoding="utf-8"?>
<css>
<atDirectives>
<entry name="@bottom-center" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A variable-width box within the area defined by the bottom margin, centered on the page area, and between the bottom-left and bottom-right margin boxes.</desc>
</entry>
<entry name="@bottom-left" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A variable-width box within the area defined by the bottom margin and adjoining the bottom-left-corner margin box.</desc>
</entry>
<entry name="@bottom-left-corner" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A box filling the area defined by the intersection of the bottom and left margins of the page box.</desc>
</entry>
<entry name="@bottom-right" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A variable-width box within the area defined by the bottom margin and adjoining the bottom-right corner margin box.</desc>
</entry>
<entry name="@bottom-right-corner" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A box filling the area defined by the intersection of the bottom and right margins of the page box.</desc>
</entry>
<entry name="@charset" version="1.0" browsers="all" ref="http://www.w3.org/TR/css3-syntax/#charset" syntax="@charset 'utf-8';">
<desc>Defines character set of the document.</desc>
</entry>
<entry name="@counter-style" version="3.0" browsers="FF33" ref="http://www.w3.org/TR/css-counter-styles-3/#the-counter-style-rule" syntax="@counter-style <counter-style-name> { <declaration-list> }">
<desc>Defines a custom counter style.</desc>
</entry>
<entry name="@custom-media" version="4.0" browsers="none" ref="http://www.w3.org/TR/mediaqueries-4/#at-ruledef-custom-media" syntax="@custom-media --narrow-viewport (max-width: 30em);">
<desc>Defines a custom media feature that can then be used in a media feature.</desc>
</entry>
<entry name="@font-face" version="3.0" browsers="all" ref="http://www.w3.org/TR/css3-fonts/#the-font-face-rule" syntax="@font-face { <font-description> }">
<desc>Allows for linking to fonts that are automatically activated when needed. This permits authors to work around the limitation of 'web-safe' fonts, allowing for consistent rendering independent of the fonts available in a given user's environment.</desc>
</entry>
<entry name="@font-feature-values" version="3.0" browsers="FF34" ref="http://www.w3.org/TR/css-fonts-3/#at-font-feature-values-rule" syntax="@font-feature-values <font-family> { }">
<desc>Defines named values for the indices used to select alternate glyphs for a given font family.</desc>
</entry>
<entry name="@import" version="1.0" browsers="all" ref="http://www.w3.org/TR/css3-syntax/#at-import" syntax="@import url('file.css') tv, print;">
<desc>Includes content of another file.</desc>
</entry>
<entry name="@keyframes" version="3.0" browsers="E,C43,FF16,IE10,O30,S9" ref="http://www.w3.org/TR/css3-animations/#keyframes" syntax="@keyframes animation-name">
<desc>Defines set of animation key frames.</desc>
</entry>
<entry name="@left-bottom" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A variable-height box within the area defined by the left margin and adjacent to the top of the bottom-left-corner.</desc>
</entry>
<entry name="@left-middle" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A variable-height box in the area defined by the left margin, centered on the page area, and between the left-top and left-bottom margin boxes.</desc>
</entry>
<entry name="@left-top" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A variable-height box within the area defined by the left margin and adjacent to the bottom of the top-left-corner.</desc>
</entry>
<entry name="@media" version="2.0" browsers="all" ref="http://www.w3.org/TR/css3-mediaqueries" syntax="@media print { ... }">
<desc>Defines a stylesheet for a particular media type.</desc>
</entry>
<entry name="@-moz-document" version="3.0" browsers="FF1.8" ref="https://developer.mozilla.org/en/CSS/@document">
<desc>Gecko-specific at-rule that restricts the style rules contained within it based on the URL of the document.</desc>
</entry>
<entry name="@-moz-keyframes" version="3.0" browsers="FF5" ref="http://www.w3.org/TR/css3-animations/#keyframes" syntax="@-moz-keyframes animation-name">
<desc>Defines set of animation key frames.</desc>
</entry>
<entry name="@-ms-viewport" version="3.0" browsers="E,IE10" ref="http://www.w3.org/TR/css-device-adapt/#the-viewport-rule" syntax="@$(name) { width: device-width; }" >
<desc>Specifies the size, zoom factor, and orientation of the viewport.</desc>
</entry>
<entry name="@namespace" version="3.0" browsers="E,C,FF1,IE9,O8,S1" ref="http://www.w3.org/TR/css3-namespace/#declaration" syntax="@namespace [prefix] string|url;">
<desc>Declares a prefix and associates it with a namespace name.</desc>
</entry>
<entry name="@-o-keyframes" version="3.0" browsers="O12" ref="http://www.w3.org/TR/css3-animations/#keyframes" syntax="@-o-keyframes animation-name { }">
<desc>Defines set of animation key frames.</desc>
</entry>
<entry name="@-o-viewport" version="3.0" browsers="O11" ref="http://dev.w3.org/csswg/css-device-adapt/#the-viewport-rule" syntax="@$(name) { width: 320px; zoom: 0.5; }">
<desc>Specifies the size, zoom factor, and orientation of the viewport.</desc>
</entry>
<entry name="@page" version="2.0" browsers="all" ref="http://www.w3.org/TR/css3-page/#page-box-page-rule" syntax="@page :first { margin-top: 10cm }">
<desc>Directive defines various page parameters.</desc>
</entry>
<entry name="@right-bottom" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A variable-height box within the area defined by the right margin and adjacent to the top of the bottom-right-corner.</desc>
</entry>
<entry name="@right-middle" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A variable-height box in the area defined by the right margin, centered on the page area, and between the right-top and right-bottom margin boxes.</desc>
</entry>
<entry name="@right-top" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A variable-height box within the area defined by the right margin and adjacent to the bottom of the top-right-corner.</desc>
</entry>
<entry name="@scope" version="3.0" browsers="none" ref="http://www.w3.org/TR/css-scoping-1/#at-ruledef-scope" syntax="@scope <selector> { <stylesheet> }">
<desc>Creates scoped style rules using CSS syntax.</desc>
</entry>
<entry name="@supports" version="3.0" browsers="E,C28,FF22,O12.1,S9" ref="http://www.w3.org/TR/css3-conditional/#at-supports" syntax="@supports (display: flexbox) { div { display: flexbox; } }">
<desc>A conditional group rule whose condition tests whether the user agent supports CSS property:value pairs.</desc>
</entry>
<entry name="@top-center" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A variable-width box within the area defined by the top margin, centered on the page area, and between the top-left and top-right margin boxes.</desc>
</entry>
<entry name="@top-left" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A variable-width box within the area defined by the top margin and adjoining the top-left-corner margin box.</desc>
</entry>
<entry name="@top-left-corner" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A fixed-size box filling the area defined by the intersection of the top and left margins of the page box.</desc>
</entry>
<entry name="@top-right" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A variable-width box within the area defined by the top margin and adjoining the top-right-corner margin box.</desc>
</entry>
<entry name="@top-right-corner" version="3" browsers="none" ref="http://www.w3.org/TR/css3-page/#page-box">
<desc>A box filling the area defined by the intersection of the top and right margins of the page box.</desc>
</entry>
<entry name="@viewport" version="3.0" browsers="none" ref="http://www.w3.org/TR/css-device-adapt/#the-viewport-rule" syntax="@$(name) { width: device-width; }">
<desc>Specifies the size, zoom factor, and orientation of the viewport.</desc>
</entry>
<entry name="@-webkit-keyframes" version="3.0" browsers="C,S4" ref="http://www.w3.org/TR/css3-animations/#keyframes" syntax="@-webkit-keyframes animation-name">
<desc>Defines set of animation key frames.</desc>
</entry>
</atDirectives>
<pseudoClasses>
<entry name=":active" version="2.0" browsers="all" ref="http://www.w3.org/TR/css3-selectors/#the-user-action-pseudo-classes-hover-act" syntax="a:active { color: red; }">
<desc>Applies while an element is being activated by the user. For example, between the times the user presses the mouse button and releases it.</desc>
</entry>
<entry name=":any-link" version="4.0" browsers="S9" ref="http://www.w3.org/TR/selectors4/#the-any-link-pseudo" syntax="a:any-link { text-decoration: none; }">
<desc>Represents an element that acts as the source anchor of a hyperlink. Applies to both visited and unvisited links.</desc>
</entry>
<entry name=":blank" version="4.0" browsers="none" ref="http://www.w3.org/TR/selectors4/#the-blank-pseudo" syntax="p:blank { display: none; }">
<desc>The same as :empty, except that it additionally matches elements that only contain code points affected by whitespace processing.</desc>
</entry>
<entry name=":checked" version="3.0" browsers="E,C,FF1,IE9,O9,S3.13" ref="http://www.w3.org/TR/css3-selectors/#checked" syntax="input:checked { color: red; }">
<desc>Radio and checkbox elements can be toggled by the user. Some menu items are 'checked' when the user selects them. When such elements are toggled 'on' the :checked pseudo-class applies.</desc>
</entry>
<entry name=":corner-present" version="3.0" browsers="C,S5" ref="https://webkit.org/blog/363/styling-scrollbars/">
<desc>Non-standard. Indicates whether or not a scrollbar corner is present.</desc>
</entry>
<entry name=":current" version="4.0" browsers="none" ref="http://www.w3.org/TR/selectors4/#current-pseudo" syntax=":current { background-color: lightyellow; }">
<desc>Represents the element, or an ancestor of the element, that is currently being displayed.</desc>
</entry>
<entry name=":current()" version="4.0" browsers="none" ref="http://www.w3.org/TR/selectors4/#current-pseudo" syntax=":current(div, p) { background-color: lightyellow; }">
<desc>Takes a list of compound selectors as its argument: it represents the :current element that matches the argument or, if that does not match, the innermost ancestor of the :current element that does.</desc>
</entry>
<entry name=":decrement" version="3.0" browsers="C,S5" ref="https://webkit.org/blog/363/styling-scrollbars/">
<desc>Non-standard. Applies to buttons and track pieces. Indicates whether or not the button or track piece will decrement the view’s position when used.</desc>
</entry>
<entry name=":default" version="3.0" browsers="C,FF3,O10,S5" ref="http://www.w3.org/TR/selectors4/#the-default-pseudo" syntax="input:default { color: red; }">
<desc>Applies to the one or more UI elements that are the default among a set of similar elements. Typically applies to context menu items, buttons, and select lists/menus.</desc>
</entry>
<entry name=":dir()" version="4.0" browsers="none" ref="http://www.w3.org/TR/selectors4/#dir-pseudo" syntax="section:dir(ltr) { border-color: pink; }">
<desc>Represents an element based on its directionality as determined by the document language.</desc>
</entry>
<entry name=":disabled" version="3.0" browsers="E,C,FF1.5,IE9,O9,S3.1" ref="http://www.w3.org/TR/css3-selectors/#enableddisabled" syntax="input:disabled { background-color: silver; }">
<desc>Represents user interface elements that are in a disabled state; such elements have a corresponding enabled state.</desc>
</entry>
<entry name=":double-button" version="3.0" browsers="C,S5" ref="https://webkit.org/blog/363/styling-scrollbars/">
<desc>Non-standard. Applies to buttons and track pieces. Applies when both buttons are displayed together at the same end of the scrollbar.</desc>
</entry>
<entry name=":empty" version="3.0" browsers="E,C,FF1.5,IE9,O9,S3.1" ref="http://www.w3.org/TR/css3-selectors/#empty-pseudo" syntax="div:empty { background-color: red; }">
<desc>Represents an element that has no children at all.</desc>
</entry>
<entry name=":enabled" version="3.0" browsers="E,C,FF1.5,IE9,O9,S3.1" ref="http://www.w3.org/TR/css3-selectors/#enableddisabled" syntax="input:enabled { background-color: green; }">
<desc>Represents user interface elements that are in an enabled state; such elements have a corresponding disabled state.</desc>
</entry>
<entry name=":end" version="3.0" browsers="C,S5" ref="https://webkit.org/blog/363/styling-scrollbars/">
<desc>Non-standard. Applies to buttons and track pieces. Indicates whether the object is placed after the thumb.</desc>
</entry>
<entry name=":first" version="2.0" browsers="all" ref="http://www.w3.org/TR/css3-page/#left-right-first" syntax="@page :first { margin-left: 4cm; }">
<desc>When printing double-sided documents, the page boxes on left and right pages may be different. This can be expressed through CSS pseudo-classes defined in the page context.</desc>
</entry>
<entry name=":first-child" version="2.0" browsers="E,C,FF3,IE7,O9.5,S3.1" ref="http://www.w3.org/TR/css3-selectors/#first-child-pseudo" syntax="li:first-child { font-size: 1.2em; }">
<desc>Same as :nth-child(1). Represents an element that is the first child of some other element.</desc>
</entry>
<entry name=":first-of-type" version="3.0" browsers="E,C,FF3.5,IE9,O9.5,S3.2" ref="http://www.w3.org/TR/css3-selectors/#first-of-type-pseudo" syntax="dl dt:first-of-type { font-size: 200%; }">
<desc>Same as :nth-of-type(1). Represents an element that is the first sibling of its type in the list of children of its parent element.</desc>
</entry>
<entry name=":focus" version="2.0" browsers="all" ref="http://www.w3.org/TR/css3-selectors/#the-user-action-pseudo-classes-hover-act" syntax="a:focus { color: yellow; }">
<desc>Applies while an element has the focus (accepts keyboard or mouse events, or other forms of input).</desc>
</entry>
<entry name=":fullscreen" version="3.0" browsers="E" ref="https://fullscreen.spec.whatwg.org/#:fullscreen-pseudo-class" syntax="iframe:fullscreen { border: none; }">
<desc>Matches any element that has its fullscreen flag set.</desc>
</entry>
<entry name=":future" version="4.0" browsers="C,O16,S6" ref="http://www.w3.org/TR/selectors4/#the-future-pseudo" syntax=":future { color: yellow; }">
<desc>Represents any element that is defined to occur entirely after a :current element.</desc>
</entry>
<entry name=":horizontal" version="3.0" browsers="C,S5" ref="https://webkit.org/blog/363/styling-scrollbars/">
<desc>Non-standard. Applies to any scrollbar pieces that have a horizontal orientation.</desc>
</entry>
<entry name=":host" version="3.0" browsers="C35,O22" ref="http://www.w3.org/TR/css-scoping-1/#selectordef-host0" syntax=":host { display: block; }">
<desc>When evaluated in the context of a shadow tree, matches the shadow tree’s host element.</desc>
</entry>
<entry name=":host()" version="3.0" browsers="C35,O22" ref="http://www.w3.org/TR/css-scoping-1/#selectordef-host" syntax=":host(.myclass) { color: blue; }">
<desc>When evaluated in the context of a shadow tree, it matches the shadow tree’s host element if the host element, in its normal context, matches the selector argument.</desc>
</entry>
<entry name=":host-context()" version="3.0" browsers="C35,O22" ref="http://www.w3.org/TR/css-scoping-1/#selectordef-host-context" syntax=":host-context(.myclass) { color: blue; }">
<desc>Tests whether there is an ancestor, outside the shadow tree, which matches a particular selector.</desc>
</entry>
<entry name=":hover" version="2.0" browsers="all" ref="http://www.w3.org/TR/css3-selectors/#the-user-action-pseudo-classes-hover-act" syntax="a:hover { text-decoration: none; }">
<desc>Applies while the user designates an element with a pointing device, but does not necessarily activate it. For example, a visual user agent could apply this pseudo-class when the cursor (mouse pointer) hovers over a box generated by the element.</desc>
</entry>
<entry name=":increment" version="3.0" browsers="C,S5" ref="https://webkit.org/blog/363/styling-scrollbars/">
<desc>Non-standard. Applies to buttons and track pieces. Indicates whether or not the button or track piece will increment the view’s position when used.</desc>
</entry>
<entry name=":indeterminate" version="4.0" browsers="E,C,FF3.6,IE9,O10.6,S3" ref="http://www.w3.org/TR/selectors4/#indeterminate" syntax="input:indeterminate { margin: auto 2px; }">
<desc>Applies to UI elements whose value is in an indeterminate state.</desc>
</entry>
<entry name=":in-range" version="4.0" browsers="E13,C,FF10,O9.6,S5.1" ref="http://www.w3.org/TR/selectors4/#range-pseudos" syntax="input:in-range { color: green; }">
<desc>Used in conjunction with the min and max attributes, whether on a range input, a number field, or any other types that accept those attributes.</desc>
</entry>
<entry name=":invalid" version="4.0" browsers="E,C,FF4,IE10,O10,S5" ref="http://www.w3.org/TR/selectors4/#validity-pseudos" syntax="input:invalid { border-color: red; }">
<desc>An element is :valid or :invalid when it is, respectively, valid or invalid with respect to data validity semantics defined by a different specification.</desc>
</entry>
<entry name=":lang()" version="2.0" browsers="E,C,FF1,IE8,O8,S3" ref="http://www.w3.org/TR/css3-selectors/#lang-pseudo" syntax="html:lang(en) { color: blue; }">
<desc>Represents an element that is in language specified.</desc>
</entry>
<entry name=":last-child" version="3.0" browsers="E,C,FF1,IE9,O9.5,S3.1" ref="http://www.w3.org/TR/css3-selectors/#last-child-pseudo" syntax="li:last-child { font-size: 1.2em; }">
<desc>Same as :nth-last-child(1). Represents an element that is the last child of some other element.</desc>
</entry>
<entry name=":last-of-type" version="3.0" browsers="E,C,FF3.5,IE9,O9.5,S3.1" ref="http://www.w3.org/TR/css3-selectors/#last-of-type-pseudo" syntax="dl dt:last-of-type { font-size: 200%; }">
<desc>Same as :nth-last-of-type(1). Represents an element that is the last sibling of its type in the list of children of its parent element.</desc>
</entry>
<entry name=":left" version="2.0" browsers="all" ref="http://www.w3.org/TR/css3-page/#left-right-first" syntax="@page :left { margin-left: 4cm; }">
<desc>When printing double-sided documents, the page boxes on left and right pages may be different. This can be expressed through CSS pseudo-classes defined in the page context.</desc>
</entry>
<entry name=":link" version="2.0" browsers="all" ref="http://www.w3.org/TR/css3-selectors/#the-link-pseudo-classes-link-and-visited" syntax="a:link { text-decoration: none; }">
<desc>Applies to links that have not yet been visited.</desc>
</entry>
<entry name=":local-link" version="4.0" browsers="none" ref="http://www.w3.org/TR/selectors4/#local-pseudo" syntax="a:local-link { text-decoration: none; }">
<desc>Allows authors to style hyperlinks based on the users current location within a site and to differentiate site-internal versus site-external links.</desc>
</entry>
<entry name=":local-link()" version="4.0" browsers="none" ref="http://www.w3.org/TR/selectors4/#local-pseudo" syntax="a:local-link(0) { text-decoration: none; }">
<desc>Accepts a non-negative integer as its sole argument, which, if the document's URL belongs to a hierarchical scheme, indicates the number of path levels to match. Use :local-link(0) to match links that target the same domain.</desc>
</entry>
<entry name=":matches()" version="4.0" browsers="S9" ref="http://www.w3.org/TR/selectors4/#matches" syntax="div:matches(:hover) { border-color: pink; }">
<desc>Takes a selector list as its argument. It represents an element that is represented by its argument.</desc>
</entry>
<entry name=":-moz-any()" version="3.0" browsers="FF4">
<desc>Represents an element that is represented by the selector list passed as its argument. Standardized as :matches().</desc>
</entry>
<entry name=":-moz-any-link" version="3.0" browsers="FF1">
<desc>Represents an element that acts as the source anchor of a hyperlink. Applies to both visited and unvisited links.</desc>
</entry>
<entry name=":-moz-broken" version="3.0" browsers="FF3">
<desc>Non-standard. Matches elements representing broken images.</desc>
</entry>
<entry name=":-moz-drag-over" version="3.0" browsers="FF1">
<desc>Non-standard. Matches elements when a drag-over event applies to it.</desc>
</entry>
<entry name=":-moz-first-node" version="3.0" browsers="FF1">
<desc>Non-standard. Represents an element that is the first child node of some other element.</desc>
</entry>
<entry name=":-moz-focusring" version="3.0" browsers="FF4">
<desc>Non-standard. Matches an element that has focus and focus ring drawing is enabled in the browser.</desc>
</entry>
<entry name=":-moz-full-screen" version="3.0" browsers="FF9">
<desc>Matches any element that has its fullscreen flag set. Standardized as :fullscreen.</desc>
</entry>
<entry name=":-moz-last-node" version="3.0" browsers="FF1">
<desc>Non-standard. Represents an element that is the last child node of some other element.</desc>
</entry>
<entry name=":-moz-loading" version="3.0" browsers="FF3">
<desc>Non-standard. Matches elements, such as images, that haven’t started loading yet.</desc>
</entry>
<entry name=":-moz-only-whitespace" version="3.0" browsers="FF1.5">
<desc>The same as :empty, except that it additionally matches elements that only contain code points affected by whitespace processing. Standardized as :blank.</desc>
</entry>
<entry name=":-moz-placeholder" version="3.0" browsers="FF4">
<desc>Deprecated. Represents placeholder text in an input field. Use ::-moz-placeholder for Firefox 19+.</desc>
</entry>
<entry name=":-moz-submit-invalid" version="3.0" browsers="FF4">
<desc>Non-standard. Represents any submit button when the contents of the associated form are not valid.</desc>
</entry>
<entry name=":-moz-suppressed" version="3.0" browsers="FF3">
<desc>Non-standard. Matches elements representing images that have been blocked from loading.</desc>
</entry>
<entry name=":-moz-ui-invalid" version="3.0" browsers="FF4">
<desc>Non-standard. Represents any validated form element whose value isn't valid </desc>
</entry>
<entry name=":-moz-ui-valid" version="3.0" browsers="FF4">
<desc>Non-standard. Represents any validated form element whose value is valid </desc>
</entry>
<entry name=":-moz-user-disabled" version="3.0" browsers="FF3">
<desc>Non-standard. Matches elements representing images that have been disabled due to the user’s preferences.</desc>
</entry>
<entry name=":-moz-window-inactive" version="3.0" browsers="FF4">
<desc>Non-standard. Matches elements in an inactive window.</desc>
</entry>
<entry name=":-ms-fullscreen" version="3.0" browsers="IE11" ref="https://fullscreen.spec.whatwg.org/#:fullscreen-pseudo-class" syntax="iframe:-ms-fullscreen { border: none; }">
<desc>Matches any element that has its fullscreen flag set.</desc>
</entry>
<entry name=":-ms-input-placeholder" version="3.0" browsers="IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh767367.aspx" syntax="input:-ms-input-placeholder { color: red; }">
<desc>Represents placeholder text in an input field. Note: for Edge use the pseudo-element ::-ms-input-placeholder. Standardized as ::placeholder.</desc>
</entry>
<entry name=":-ms-keyboard-active" version="3.0" browsers="IE10" ref="https://msdn.microsoft.com/en-us/library/dn336891(v=vs.85).aspx" syntax="input:-ms-keyboard-active { background: red; }">
<desc>Windows Store apps only. Applies one or more styles to an element when it has focus and the user presses the space bar.</desc>
</entry>
<entry name=":-ms-lang()" version="4.0" browsers="E,IE10" ref="http://www.w3.org/TR/selectors4/#lang-pseudo" syntax="html:-ms-lang(en, fr, de) { color: blue; }">
<desc>Represents an element that is in the language specified. Accepts a comma seperated list of language tokens.</desc>
</entry>
<entry name=":no-button" version="3.0" browsers="C,S5" ref="https://webkit.org/blog/363/styling-scrollbars/">
<desc>Non-standard. Applies to track pieces. Applies when there is no button at that end of the track.</desc>
</entry>
<entry name=":not()" version="3.0" browsers="E,C,FF1,IE9,O9.5,S2" ref="http://www.w3.org/TR/css3-selectors/#negation" syntax="div:not(:empty) { border-color: pink; }">
<desc>The negation pseudo-class, :not(X), is a functional notation taking a simple selector (excluding the negation pseudo-class itself) as an argument. It represents an element that is not represented by its argument.</desc>
</entry>
<entry name=":nth-child()" version="3.0" browsers="E,C,FF3.5,IE9,O9.5,S3.1" ref="http://www.w3.org/TR/css3-selectors/#nth-child-pseudo" syntax="tr:nth-child(2n+1) { border-color: pink; }">
<desc>Represents an element that has an+b-1 siblings before it in the document tree, for any positive integer or zero value of n, and has a parent element.</desc>
</entry>
<entry name=":nth-column()" version="4.0" browsers="none" ref="http://www.w3.org/TR/selectors4/#nth-column-pseudo" syntax=":nth-column(2n+1) > span { color: yellow; }">
<desc>Represents a cell element belonging to a column that has An+B-1 columns before it, for any positive integer or zero value of n.</desc>
</entry>
<entry name=":nth-last-child()" version="3.0" browsers="E,C,FF3.5,IE9,O9.5,S3.1" ref="http://www.w3.org/TR/css3-selectors/#nth-last-child-pseudo" syntax="tr:nth-last-child(-n+2) { border-color: pink; }">
<desc>Represents an element that has an+b-1 siblings after it in the document tree, for any positive integer or zero value of n, and has a parent element.</desc>
</entry>
<entry name=":nth-last-column()" version="4.0" browsers="none" ref="http://www.w3.org/TR/selectors4/#nth-column-pseudo" syntax=":nth-last-column(2n+1) > span { color: yellow; }">
<desc>Represents a cell element belonging to a column that has An+B-1 columns after it, for any positive integer or zero value of n.</desc>
</entry>
<entry name=":nth-last-match()" version="4.0" browsers="none" ref="http://www.w3.org/TR/selectors4/#nth-last-match-pseudo" syntax="div:nth-last-match(p) { border-color: pink; }">
<desc>Represents an element that has An+B-1 siblings that match the given selector list after it in the document tree.</desc>
</entry>
<entry name=":nth-last-of-type()" version="3.0" browsers="E,C,FF3.5,IE9,O9.5,S3.1" ref="http://www.w3.org/TR/css3-selectors/#nth-of-type-pseudo" syntax="tr:nth-last-of-type(n+2) { border-color: pink; }">
<desc>Represents an element that has an+b-1 siblings with the same expanded element name after it in the document tree, for any zero or positive integer value of n, and has a parent element.</desc>
</entry>
<entry name=":nth-match()" version="4.0" browsers="none" ref="http://www.w3.org/TR/selectors4/#the-nth-match-pseudo" syntax="div:nth-match(p) { border-color: pink; }">
<desc>Represents an element that has An+B-1 siblings that match the given selector list before it in the document tree.</desc>
</entry>
<entry name=":nth-of-type()" version="3.0" browsers="E,C,FF3.5,IE9,O9.5,S3.1" ref="http://www.w3.org/TR/css3-selectors/#nth-of-type-pseudo" syntax="tr:nth-of-type(2n) { border-color: pink; }">
<desc>Represents an element that has an+b-1 siblings with the same expanded element name before it in the document tree, for any zero or positive integer value of n, and has a parent element.</desc>
</entry>
<entry name=":only-child" version="3.0" browsers="E,C,FF1.5,IE9,O9.5,S3.1" ref="http://www.w3.org/TR/css3-selectors/#only-child-pseudo" syntax="p:only-child { color: #f00; }">
<desc>Represents an element that has a parent element and whose parent element has no other element children. Same as :first-child:last-child or :nth-child(1):nth-last-child(1), but with a lower specificity.</desc>
</entry>
<entry name=":only-of-type" version="3.0" browsers="E,C,FF3.5,IE9,O9.5,S3.2" ref="http://www.w3.org/TR/css3-selectors/#only-of-type-pseudo" syntax="p:only-of-type { color: #f00; }">
<desc>Matches every element that is the only child of its type, of its parent. Same as :first-of-type:last-of-type or :nth-of-type(1):nth-last-of-type(1), but with a lower specificity.</desc>
</entry>
<entry name=":optional" version="4.0" browsers="E,C,FF4,IE10,O10,S5" ref="http://www.w3.org/TR/selectors4/#opt-pseudos" syntax="input:optional { color: yellow; }">
<desc>A form element is :required or :optional if a value for it is, respectively, required or optional before the form it belongs to is submitted. Elements that are not form elements are neither required nor optional.</desc>
</entry>
<entry name=":out-of-range" version="4.0" browsers="E13,C,FF10,O9.6,S5.1" ref="http://www.w3.org/TR/selectors4/#range-pseudos" syntax="input:out-of-range { color: red; }">
<desc>Used in conjunction with the min and max attributes, whether on a range input, a number field, or any other types that accept those attributes.</desc>
</entry>
<entry name=":past" version="4.0" browsers="C,O16,S6" ref="http://www.w3.org/TR/selectors4/#the-past-pseudo" syntax=":past { color: green; }">
<desc>Represents any element that is defined to occur entirely prior to a :current element.</desc>
</entry>
<entry name=":placeholder-shown" version="4.0" browsers="none" ref="http://www.w3.org/TR/selectors4/#placeholder" syntax="input:placeholder-shown { color: grey; }">
<desc>Matches an input element that is showing placeholder text.</desc>
</entry>
<entry name=":read-only" version="4.0" browsers="E13,C,FF10,O9,S4" ref="http://www.w3.org/TR/selectors4/#rw-pseudos" syntax="input:read-only { margin: auto; }">
<desc>An element whose contents are not user-alterable is :read-only. However, elements whose contents are user-alterable (such as text input fields) are considered to be in a :read-write state. In typical documents, most elements are :read-only.</desc>
</entry>
<entry name=":read-write" version="4.0" browsers="E13,C,FF10,O9,S4" ref="http://www.w3.org/TR/selectors4/#rw-pseudos" syntax="input:read-write { margin: auto 2px; }">
<desc>An element whose contents are not user-alterable is :read-only. However, elements whose contents are user-alterable (such as text input fields) are considered to be in a :read-write state. In typical documents, most elements are :read-only.</desc>
</entry>
<entry name=":required" version="4.0" browsers="E,C,FF4,IE10,O10,S5" ref="http://www.w3.org/TR/selectors4/#opt-pseudos" syntax="input:optional { color: yellow; }">
<desc>A form element is :required or :optional if a value for it is, respectively, required or optional before the form it belongs to is submitted. Elements that are not form elements are neither required nor optional.</desc>
</entry>
<entry name=":recto" version="3.0" browsers="none" ref="https://drafts.csswg.org/css-logical-props/#valdef-logical-page-selector-recto" syntax="@page :recto { margin-inline-start: 4cm; }">
<desc>Equivalent to ':right' in left-to-right page progressions and ':left' in right-to-left page progressions.</desc>
</entry>
<entry name=":right" version="2.0" browsers="all" ref="http://www.w3.org/TR/css3-page/#left-right-first" syntax="@page :right { margin-left: 4cm; }">
<desc>When printing double-sided documents, the page boxes on left and right pages may be different. This can be expressed through CSS pseudo-classes defined in the page context.</desc>
</entry>
<entry name=":root" version="3.0" browsers="E,C,FF1,IE9,O9.5,S1" ref="http://www.w3.org/TR/css3-selectors/#root-pseudo" syntax=":root { padding: auto 3em; }">
<desc>Represents an element that is the root of the document. In HTML 4, this is always the HTML element.</desc>
</entry>
<entry name=":scope" version="4.0" browsers="FF32,S6" ref="http://www.w3.org/TR/selectors4/#scope-pseudo" syntax=":scope { border-color: pink; }">
<desc>Represents any element that is in the contextual reference element set.</desc>
</entry>
<entry name=":single-button" version="3.0" browsers="C,S5" ref="https://webkit.org/blog/363/styling-scrollbars/">
<desc>Non-standard. Applies to buttons and track pieces. Applies when both buttons are displayed separately at either end of the scrollbar.</desc>
</entry>
<entry name=":start" version="3.0" browsers="C,S5" ref="https://webkit.org/blog/363/styling-scrollbars/">
<desc>Non-standard. Applies to buttons and track pieces. Indicates whether the object is placed before the thumb.</desc>
</entry>
<entry name=":target" version="3.0" browsers="E,C,FF1,IE9,O9.5,S1" ref="http://www.w3.org/TR/css3-selectors/#root-pseudo" syntax="h2:target { background-color: yellow; }">
<desc>Some URIs refer to a location within a resource. This kind of URI ends with a 'number sign' (#) followed by an anchor identifier (called the fragment identifier).</desc>
</entry>
<entry name=":user-invalid" version="4.0" browsers="none" ref="http://www.w3.org/TR/selectors4/#user-pseudos" syntax="input:user-invalid { outline: 2px solid red; }">
<desc>Represents an input element with incorrect input, but only after the user has significantly interacted with it.</desc>
</entry>
<entry name=":valid" version="4.0" browsers="E,C,FF4,IE10,O10,S5" ref="http://www.w3.org/TR/selectors4/#validity-pseudos" syntax="input:valid { border-color: green; }">
<desc>An element is :valid or :invalid when it is, respectively, valid or invalid with respect to data validity semantics defined by a different specification.</desc>
</entry>
<entry name=":verso" version="3.0" browsers="none" ref="https://drafts.csswg.org/css-logical-props/#valdef-logical-page-selector-verso" syntax="@page :verso { margin-inline-end: 4cm; }">
<desc>Equivalent to ':left' in left-to-right page progressions and ':right' in right-to-left page progressions.</desc>
</entry>
<entry name=":vertical" version="3.0" browsers="C,S5" ref="https://webkit.org/blog/363/styling-scrollbars/">
<desc>Non-standard. Applies to any scrollbar pieces that have a vertical orientation.</desc>
</entry>
<entry name=":visited" version="2.0" browsers="all" ref="http://www.w3.org/TR/css3-selectors/#the-link-pseudo-classes-link-and-visited" syntax="a:visited { color: purple; }">
<desc>Applies once the link has been visited by the user.</desc>
</entry>
<entry name=":-webkit-any()" version="3.0" browsers="C,S5">
<desc>Represents an element that is represented by the selector list passed as its argument. Standardized as :matches().</desc>
</entry>
<entry name=":-webkit-full-screen" version="3.0" browsers="C,S6">
<desc>Matches any element that has its fullscreen flag set. Standardized as :fullscreen.</desc>
</entry>
<entry name=":window-inactive" version="3.0" browsers="C,S3" ref="https://webkit.org/blog/363/styling-scrollbars/">
<desc>Non-standard. Applies to all scrollbar pieces. Indicates whether or not the window containing the scrollbar is currently active.</desc>
</entry>
</pseudoClasses>
<pseudoElements>
<entry name="::after" version="3.0" browsers="E,C,FF1.5,IE9,O9,S4" ref="http://www.w3.org/TR/css-pseudo-4/#selectordef-after" syntax="div::after { content: 'abc'; }">
<desc>Represents a styleable child pseudo-element immediately after the originating element’s actual content.</desc>
</entry>
<entry name="::backdrop" version="3.0" browsers="E" ref="https://fullscreen.spec.whatwg.org/#::backdrop-pseudo-element" syntax="*|*:fullscreen::backdrop { position: fixed; }">
<desc>Used to create a backdrop that hides the underlying document for an element in a top layer (such as an element that is displayed fullscreen).</desc>
</entry>
<entry name="::before" version="3.0" browsers="E,C,FF1.5,IE9,O9,S4" ref="http://www.w3.org/TR/css-pseudo-4/#selectordef-before" syntax="div::before { content: 'abc'; }">
<desc>Represents a styleable child pseudo-element immediately before the originating element’s actual content.</desc>
</entry>
<entry name="::content" version="3.0" browsers="C35,O22" ref="http://www.w3.org/TR/css-scoping-1/#selectordef-content" syntax="::content > span { color: yellow; }">
<desc>Deprecated. Matches the distribution list itself, on elements that have one. Use ::slotted for forward compatibility.</desc>
</entry>
<entry name="::cue" version="3.0" browsers="C,O16,S6" ref="https://w3c.github.io/webvtt/#the-cue-pseudo-element" syntax="::cue { color: red; }" />
<entry name="::cue()" version="3.0" browsers="C,O16,S6" ref="https://w3c.github.io/webvtt/#selectordef-cue-selector" syntax="::cue(v(voice=woman)) { color: red; }" />
<entry name="::cue-region" version="3.0" browsers="C,O16,S6" ref="https://w3c.github.io/webvtt/#the-cue-region-pseudo-element" syntax="::cue-region { border: none; }" />
<entry name="::cue-region()" version="3.0" browsers="C,O16,S6" ref="https://w3c.github.io/webvtt/#the-cue-region-pseudo-element" syntax="::cue-region(v(voice=woman)) { color: red; }" />
<entry name="::first-letter" version="3.0" browsers="E,C,FF1.5,IE9,O7,S1" ref="http://www.w3.org/TR/css-pseudo-4/#first-letter-pseudo" syntax="p::first-letter { font-size: 200%; }">
<desc>Represents the first letter of an element, if it is not preceded by any other content (such as images or inline tables) on its line.</desc>
</entry>
<entry name="::first-line" version="3.0" browsers="E,C,FF1.5,IE9,O7,S1" ref="http://www.w3.org/TR/css-pseudo-4/#selectordef-first-line" syntax="p::first-line { color: green; }">
<desc>Describes the contents of the first formatted line of its originating element.</desc>
</entry>
<entry name="::grammar-error" version="4.0" browsers="none" ref="http://www.w3.org/TR/css-pseudo-4/#selectordef-grammar-error" syntax="::grammar-error { text-decoration: dotted underline green; }">
<desc>Represents a portion of text that has been flagged by the user agent as misspelled.</desc>
</entry>
<entry name="::marker" version="3.0" browsers="none" ref="http://www.w3.org/TR/css3-lists/#selectordef-marker" syntax="li::marker { content: counter(counter); }">
<desc>Generated by list items to represent the item’s marker.</desc>
</entry>
<entry name="::-moz-focus-inner" version="3.0" browsers="FF4" />
<entry name="::-moz-focus-outer" version="3.0" browsers="FF4" />
<entry name="::-moz-list-bullet" version="3.0" browsers="FF1">
<desc>Used to style the bullet of a list element. Similar to the standardized ::marker.</desc>
</entry>
<entry name="::-moz-list-number" version="3.0" browsers="FF1">
<desc>Used to style the numbers of a list element. Similar to the standardized ::marker.</desc>
</entry>
<entry name="::-moz-placeholder" version="3.0" browsers="FF19">
<desc>Represents placeholder text in an input field</desc>
</entry>
<entry name="::-moz-progress-bar" version="3.0" browsers="FF9">
<desc>Represents the bar portion of a progress bar.</desc>
</entry>
<entry name="::-moz-selection" version="3.0" browsers="FF1">
<desc>Represents the portion of a document that has been highlighted by the user.</desc>
</entry>
<entry name="::-ms-backdrop" version="3.0" browsers="IE11" ref="https://fullscreen.spec.whatwg.org/#::backdrop-pseudo-element" syntax="*|*:-ms-fullscreen::-ms-backdrop { position: fixed; }">
<desc>Used to create a backdrop that hides the underlying document for an element in a top layer (such as an element that is displayed fullscreen).</desc>
</entry>
<entry name="::-ms-browse" version="3.0" browsers="E,IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh779844.aspx">
<desc>Represents the browse button of an input type=file control.</desc>
</entry>
<entry name="::-ms-check" version="3.0" browsers="E,IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh465739.aspx">
<desc>Represents the check of a checkbox or radio button input control.</desc>
</entry>
<entry name="::-ms-clear" version="3.0" browsers="E,IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh465740.aspx">
<desc>Represents the clear button of a text input control</desc>
</entry>
<entry name="::-ms-expand" version="3.0" browsers="E,IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh465742.aspx">
<desc>Represents the drop-down button of a select control.</desc>
</entry>
<entry name="::-ms-fill" version="3.0" browsers="E,IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh465757.aspx">
<desc>Represents the bar portion of a progress bar.</desc>
</entry>
<entry name="::-ms-fill-lower" version="3.0" browsers="E,IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh465745.aspx">
<desc>Represents the portion of the slider track from its smallest value up to the value currently selected by the thumb. In a left-to-right layout, this is the portion of the slider track to the left of the thumb.</desc>
</entry>
<entry name="::-ms-fill-upper" version="3.0" browsers="E,IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh465748.aspx">
<desc>Represents the portion of the slider track from the value currently selected by the thumb up to the slider's largest value. In a left-to-right layout, this is the portion of the slider track to the right of the thumb.</desc>
</entry>
<entry name="::-ms-reveal" version="3.0" browsers="E,IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh465773.aspx">
<desc>Represents the password reveal button of an input type=password control.</desc>
</entry>
<entry name="::-ms-thumb" version="3.0" browsers="E,IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh465780.aspx">
<desc>Represents the portion of range input control (also known as a slider control) that the user drags.</desc>
</entry>
<entry name="::-ms-ticks-after" version="3.0" browsers="E,IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh465789.aspx">
<desc>Represents the tick marks of a slider that begin just after the thumb and continue up to the slider's largest value. In a left-to-right layout, these are the ticks to the right of the thumb.</desc>
</entry>
<entry name="::-ms-ticks-before" version="3.0" browsers="E,IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh465796.aspx">
<desc>Represents the tick marks of a slider that represent its smallest values up to the value currently selected by the thumb. In a left-to-right layout, these are the ticks to the left of the thumb.</desc>
</entry>
<entry name="::-ms-tooltip" version="3.0" browsers="E,IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh465805.aspx">
<desc>Represents the tooltip of a slider (input type=range).</desc>
</entry>
<entry name="::-ms-track" version="3.0" browsers="E,IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh465813.aspx">
<desc>Represents the track of a slider.</desc>
</entry>
<entry name="::-ms-value" version="3.0" browsers="E,IE10" ref="https://msdn.microsoft.com/en-us/library/windows/apps/hh465820.aspx">
<desc>Represents the content of a text or password input control, or a select control.</desc>
</entry>
<entry name="::placeholder" version="4.0" browsers="none" ref="http://www.w3.org/TR/css-pseudo-4/#selectordef-placeholder" syntax="input::placeholder { color: grey; }">
<desc>Represents placeholder text in an input field</desc>
</entry>
<entry name="::selection" version="4.0" browsers="E,C,IE9,O9.5,S1.1" ref="http://www.w3.org/TR/css-pseudo-4/#selectordef-selection" syntax="p::selection { color: red; }">
<desc>Represents the portion of a document that has been highlighted by the user.</desc>
</entry>
<entry name="::region" version="3.0" browsers="none" ref="http://www.w3.org/TR/css-scoping-1/#the-region-pseudo-element" syntax="::region p { margin-right: 5em; }">
<desc>Represents a relationship between a selector that matches a CSS Region, and a relative selector that matches some named flow content.</desc>
</entry>
<entry name="::shadow" version="3.0" browsers="C35,O22" ref="http://www.w3.org/TR/css-scoping-1/#shadow-pseudoelement" syntax="x-foo::shadow > span { color: red; }">
<desc>Matches the shadow root if an element has a shadow tree.</desc>
</entry>
<entry name="::slotted" version="3.0" browsers="none" ref="https://drafts.csswg.org/css-scoping-1/#selectordef-slotted" syntax="::slotted > span { color: yellow; }">
<desc>Matches the distribution list itself, on elements that have one.</desc>
</entry>
<entry name="::spelling-error" version="4.0" browsers="none" ref="http://www.w3.org/TR/css-pseudo-4/#selectordef-spelling-error" syntax="::spelling-error { text-decoration: dotted underline red; }">
<desc>Represents a portion of text that has been flagged by the user agent as misspelled.</desc>
</entry>
<entry name="::-webkit-file-upload-button" version="3.0" browsers="C,O,S6" />
<entry name="::-webkit-inner-spin-button" version="3.0" browsers="C,O,S6" />
<entry name="::-webkit-input-placeholder" version="3.0" browsers="C,S4" />
<entry name="::-webkit-keygen-select" version="3.0" browsers="C,O,S6" />
<entry name="::-webkit-meter-bar" version="3.0" browsers="E13,C,O15,S6" />
<entry name="::-webkit-meter-even-less-good-value" version="3.0" browsers="E13,C,O15,S6" />
<entry name="::-webkit-meter-optimum-value" version="3.0" browsers="E13,C,O15,S6" />
<entry name="::-webkit-meter-suboptimal-value" version="3.0" browsers="E13,C,O15,S6" />
<entry name="::-webkit-outer-spin-button" version="3.0" browsers="C,O,S6" />
<entry name="::-webkit-progress-bar" version="3.0" browsers="C,S3" />
<entry name="::-webkit-progress-inner-element" version="3.0" browsers="C,S3" />
<entry name="::-webkit-progress-value" version="3.0" browsers="C,S3" />
<entry name="::-webkit-resizer" version="3.0" browsers="C,S5" />
<entry name="::-webkit-scrollbar" version="3.0" browsers="C,S5" />
<entry name="::-webkit-scrollbar-button" version="3.0" browsers="C,S5" />
<entry name="::-webkit-scrollbar-corner" version="3.0" browsers="C,S5" />
<entry name="::-webkit-scrollbar-thumb" version="3.0" browsers="C,S5" />
<entry name="::-webkit-scrollbar-track" version="3.0" browsers="C,S5" />
<entry name="::-webkit-scrollbar-track-piece" version="3.0" browsers="C,S5" />
<entry name="::-webkit-search-cancel-button" version="3.0" browsers="C,S4" />
<entry name="::-webkit-search-decoration" version="3.0" browsers="C,S4" />
<entry name="::-webkit-search-results-button" version="3.0" browsers="C,S4" />
<entry name="::-webkit-search-results-decoration" version="3.0" browsers="C,S4" />
<entry name="::-webkit-slider-runnable-track" version="3.0" browsers="C,O,S6" />
<entry name="::-webkit-slider-thumb" version="3.0" browsers="C,O,S6" />
<entry name="::-webkit-textfield-decoration-container" version="3.0" browsers="C,O,S6" />
<entry name="::-webkit-validation-bubble" version="3.0" browsers="C,O,S6" />
<entry name="::-webkit-validation-bubble-arrow" version="3.0" browsers="C,O,S6" />
<entry name="::-webkit-validation-bubble-arrow-clipper" version="3.0" browsers="C,O,S6" />
<entry name="::-webkit-validation-bubble-heading" version="3.0" browsers="C,O,S6" />
<entry name="::-webkit-validation-bubble-message" version="3.0" browsers="C,O,S6" />
<entry name="::-webkit-validation-bubble-text-block" version="3.0" browsers="C,O,S6" />
</pseudoElements>
<properties>
<entry name="additive-symbols" restriction="integer, string, image, identifier" version="3.0" browsers="FF33" ref="http://www.w3.org/TR/css-counter-styles-3/#descdef-counter-style-additive-symbols" syntax="@counter-style { additive-symbols: 1 I; }">
<desc>@counter-style descriptor. Specifies the symbols used by the marker-construction algorithm specified by the system descriptor. Needs to be specified if the counter system is 'additive'.</desc>
</entry>
<entry name="align-content" restriction="enum" version="3.0" browsers="E,C29,FF22,IE11,O12.1,S9" ref="http://www.w3.org/TR/css3-flexbox/#align-content" syntax="p { $(name): flex-start; }">
<desc>Aligns a flex container’s lines within the flex container when there is extra space in the cross-axis, similar to how 'justify-content' aligns individual items within the main-axis.</desc>
<values>
<value name="center" version="3.0" browsers="all">
<desc>Lines are packed toward the center of the flex container.</desc>
</value>
<value name="flex-end" version="3.0" browsers="all">
<desc>Lines are packed toward the end of the flex container.</desc>
</value>
<value name="flex-start" version="3.0" browsers="all">
<desc>Lines are packed toward the start of the flex container.</desc>
</value>
<value name="space-around" version="3.0" browsers="all">
<desc>Lines are evenly distributed in the flex container, with half-size spaces on either end.</desc>
</value>
<value name="space-between" version="3.0" browsers="all">
<desc>Lines are evenly distributed in the flex container.</desc>
</value>
<value name="stretch" version="3.0" browsers="all">
<desc>Lines stretch to take up the remaining space.</desc>
</value>
</values>
</entry>
<entry name="align-items" restriction="enum" version="3.0" browsers="E,C29,FF22,IE11,O12.1,S9" ref="http://www.w3.org/TR/css3-flexbox/#align-items" syntax="p { $(name): flex-start; }">
<desc>Aligns flex items along the cross axis of the current line of the flex container.</desc>
<values>
<value name="baseline" version="3.0" browsers="all">
<desc>If the flex item’s inline axis is the same as the cross axis, this value is identical to 'flex-start'. Otherwise, it participates in baseline alignment.</desc>
</value>
<value name="center" version="3.0" browsers="all">
<desc>The flex item’s margin box is centered in the cross axis within the line.</desc>
</value>
<value name="flex-end" version="3.0" browsers="all">
<desc>The cross-end margin edge of the flex item is placed flush with the cross-end edge of the line.</desc>
</value>
<value name="flex-start" version="3.0" browsers="all">
<desc>The cross-start margin edge of the flex item is placed flush with the cross-start edge of the line.</desc>
</value>
<value name="stretch" version="3.0" browsers="all">
<desc>If the cross size property of the flex item computes to auto, and neither of the cross-axis margins are auto, the flex item is stretched.</desc>
</value>
</values>
</entry>
<entry name="justify-items" restriction="enum" version="3.0" browsers="FF45" ref="https://www.w3.org/TR/css-grid-1/#row-align">
<desc>Defines the default justify-self for all items of the box, given them the default way of justifying each box along the appropriate axi</desc>
<values>
<value name="auto" version="3.0" browsers="all">
</value>
<value name="normal" version="3.0" browsers="all">
</value>
<value name="end" version="3.0" browsers="all">
</value>
<value name="start" version="3.0" browsers="all">
</value>
<value name="flex-end" version="3.0" browsers="all">
<desc>"Flex items are packed toward the end of the line."</desc>
</value>
<value name="flex-start" version="3.0" browsers="all">
<desc>"Flex items are packed toward the start of the line."</desc>
</value>
<value name="self-end" version="3.0" browsers="all">
<desc>The item is packed flush to the edge of the alignment container of the end side of the item, in the appropriate axis.</desc>
</value>
<value name="self-start" version="3.0" browsers="all">
<desc>The item is packed flush to the edge of the alignment container of the start side of the item, in the appropriate axis..</desc>
</value>
<value name="center" version="3.0" browsers="all">
<desc>The items are packed flush to each other toward the center of the of the alignment container.</desc>
</value>
<value name="left" version="3.0" browsers="all">
</value>
<value name="right" version="3.0" browsers="all">
</value>
<value name="baseline" version="3.0" browsers="all">
</value>
<value name="first baseline" version="3.0" browsers="all">
</value>
<value name="last baseline" version="3.0" browsers="all">
</value>
<value name="stretch" version="3.0" browsers="all">
<desc>If the cross size property of the flex item computes to auto, and neither of the cross-axis margins are auto, the flex item is stretched.</desc>
</value>
<value name="save" version="3.0" browsers="all">
</value>
<value name="unsave" version="3.0" browsers="all">
</value>
<value name="legacy" version="3.0" browsers="all">
</value>
</values>
</entry>
<entry name="justify-self" restriction="enum" version="3.0" browsers="FF45" ref="https://www.w3.org/TR/css-grid-1/#row-align">
<desc>Defines the way of justifying a box inside its container along the appropriate axis.</desc>
<values>
<value name="auto" version="3.0" browsers="all">
</value>
<value name="normal" version="3.0" browsers="all">
</value>
<value name="end" version="3.0" browsers="all">
</value>
<value name="start" version="3.0" browsers="all">
</value>
<value name="flex-end" version="3.0" browsers="all">
<desc>"Flex items are packed toward the end of the line."</desc>
</value>
<value name="flex-start" version="3.0" browsers="all">
<desc>"Flex items are packed toward the start of the line."</desc>
</value>
<value name="self-end" version="3.0" browsers="all">
<desc>The item is packed flush to the edge of the alignment container of the end side of the item, in the appropriate axis.</desc>
</value>
<value name="self-start" version="3.0" browsers="all">
<desc>The item is packed flush to the edge of the alignment container of the start side of the item, in the appropriate axis..</desc>
</value>
<value name="center" version="3.0" browsers="all">
<desc>The items are packed flush to each other toward the center of the of the alignment container.</desc>
</value>
<value name="left" version="3.0" browsers="all">
</value>
<value name="right" version="3.0" browsers="all">
</value>
<value name="baseline" version="3.0" browsers="all">
</value>
<value name="first baseline" version="3.0" browsers="all">
</value>
<value name="last baseline" version="3.0" browsers="all">
</value>
<value name="stretch" version="3.0" browsers="all">
<desc>If the cross size property of the flex item computes to auto, and neither of the cross-axis margins are auto, the flex item is stretched.</desc>
</value>
<value name="save" version="3.0" browsers="all">
</value>
<value name="unsave" version="3.0" browsers="all">
</value>
</values>
</entry>
<entry name="alignment-baseline" restriction="enum" version="3.0" browsers="none" ref="http://www.w3.org/TR/css-inline/#propdef-alignment-baseline" syntax="img { $(name): middle; }">
<desc>Specifies what point of an inline-level box is aligned to what point in the parent.</desc>
<values>
<value name="alphabetic" version="3.0" browsers="all">
<desc>Match the box’s alphabetic baseline to that of its parent.</desc>
</value>
<value name="baseline" version="3.0" browsers="all">
<desc>Use the dominant baseline choice of the parent. Match the box’s corresponding baseline to that of its parent.</desc>
</value>
<value name="bottom" version="3.0" browsers="all">
<desc>Align the bottom of the aligned subtree with the bottom of the line box.</desc>
</value>
<value name="center" version="3.0" browsers="all">
<desc>Align the center of the aligned subtree with the center of the line box.</desc>
</value>
<value name="central" version="3.0" browsers="all">
<desc>Match the box’s central baseline to the central baseline of its parent.</desc>
</value>
<value name="mathematical" version="3.0" browsers="all">
<desc>Match the box’s mathematical baseline to that of its parent.</desc>
</value>
<value name="middle" version="3.0" browsers="all">
<desc>Align the vertical midpoint of the box with the baseline of the parent box plus half the x-height of the parent.</desc>
</value>
<value name="text-bottom" version="3.0" browsers="all">
<desc>Match the bottom of the box to the bottom of the parent’s content area.</desc>
</value>
<value name="text-top" version="3.0" browsers="all">
<desc>Match the top of the box to the top of the parent’s content area.</desc>
</value>
<value name="top" version="3.0" browsers="all">
<desc>Align the top of the aligned subtree with the top of the line box.</desc>
</value>
</values>
</entry>
<entry name="align-self" restriction="enum" version="3.0" browsers="E,C29,FF22,IE11,O12.1,S9" ref="http://www.w3.org/TR/css3-flexbox/#align-items" syntax="p { $(name): flex-start; }">
<desc>Allows the default alignment along the cross axis to be overridden for individual flex items.</desc>
<values>
<value name="auto" version="3.0" browsers="all">
<desc>Computes to the value of 'align-items' on the element’s parent, or 'stretch' if the element has no parent. On absolutely positioned elements, it computes to itself.</desc>
</value>
<value name="baseline" version="3.0" browsers="all">
<desc>If the flex item’s inline axis is the same as the cross axis, this value is identical to 'flex-start'. Otherwise, it participates in baseline alignment.</desc>
</value>
<value name="center" version="3.0" browsers="all">
<desc>The flex item’s margin box is centered in the cross axis within the line.</desc>
</value>
<value name="flex-end" version="3.0" browsers="all">
<desc>The cross-end margin edge of the flex item is placed flush with the cross-end edge of the line.</desc>
</value>
<value name="flex-start" version="3.0" browsers="all">
<desc>The cross-start margin edge of the flex item is placed flush with the cross-start edge of the line.</desc>
</value>
<value name="stretch" version="3.0" browsers="all">
<desc>If the cross size property of the flex item computes to auto, and neither of the cross-axis margins are auto, the flex item is stretched.</desc>
</value>
</values>
</entry>
<entry name="all" restriction="enum" version="3.0" browsers="C37,FF27,O24" ref="http://www.w3.org/TR/css-cascade-3/#all-shorthand" syntax="* { $(name): unset; }">
<desc>Shorthand that resets all properties except 'direction' and 'unicode-bidi'.</desc>
<values>
<value name="revert" version="4.0" browsers="none">
<desc>Behavior depends on the origin to which the declaration belongs.</desc>
</value>
</values>
</entry>
<entry name="alt" restriction="string, enum" version="3.0" browsers="S9" ref="https://drafts.csswg.org/css-content-3/#propdef-alt" syntax="label::before { $(name): 'alt text'; }">
<desc>Provides alternative text for assistive technology to replace the genenerated content of a ::before or ::after element.</desc>
<values>
<value name="none" version="3.0" browsers="none">
<desc>No alternative text.</desc>
</value>
</values>
</entry>
<entry name="animation" restriction="time, timing-function, enum, identifier, number" version="3.0" browsers="E,C43,FF16,IE10,O12.1,S9" ref="http://www.w3.org/TR/css3-animations/#animation" syntax="div { $(name): movearound 4s ease 3 normal; }">
<desc>Shorthand property combines six of the animation properties into a single property.</desc>
<values>
<value name="alternate" version="3.0" browsers="all">
<desc>The animation cycle iterations that are odd counts are played in the normal direction, and the animation cycle iterations that are even counts are played in a reverse direction.</desc>
</value>
<value name="alternate-reverse" version="3.0" browsers="all">
<desc>The animation cycle iterations that are odd counts are played in the reverse direction, and the animation cycle iterations that are even counts are played in a normal direction.</desc>
</value>
<value name="backwards" version="3.0" browsers="all">
<desc>The beginning property value (as defined in the first @keyframes at-rule) is applied before the animation is displayed, during the period defined by 'animation-delay'.</desc>
</value>
<value name="both" version="3.0" browsers="all">
<desc>Both forwards and backwards fill modes are applied.</desc>
</value>
<value name="forwards" version="3.0" browsers="all">
<desc>The final property value (as defined in the last @keyframes at-rule) is maintained after the animation completes.</desc>
</value>
<value name="infinite" version="3.0" browsers="all">
<desc>Causes the animation to repeat forever.</desc>
</value>
<value name="none" version="3.0" browsers="all">
<desc>No animation is performed</desc>
</value>
<value name="normal" version="3.0" browsers="all">
<desc>Normal playback.</desc>
</value>
<value name="reverse" version="3.0" browsers="all">
<desc>All iterations of the animation are played in the reverse direction from the way they were specified.</desc>
</value>
</values>
</entry>
<entry name="animation-composition" restriction="enum" version="4.0" browsers="none" ref="https://drafts.csswg.org/css-animations-2/#propdef-animation-composition" syntax="div { $(name): add; }">
<desc>Defines the composite operation used when multiple animations affect the same property simultaneously.</desc>
<values>
<value name="accumulate" version="4.0" browsers="all">
<desc>The effect value is accumulated onto the underlying value.</desc>
</value>
<value name="add" version="4.0" browsers="all">
<desc>The effect value is added to the underlying value.</desc>
</value>
<value name="replace" version="4.0" browsers="all">
<desc>The result of compositing the effect value with the underlying value is simply the effect value.</desc>
</value>
</values>
</entry>
<entry name="animation-delay" restriction="time" version="3.0" browsers="E,C43,FF16,IE10,O12.1,S9" ref="http://www.w3.org/TR/css3-animations/#animation-delay" syntax="div { $(name): 4s; }">
<desc>Defines when the animation will start.</desc>
</entry>
<entry name="animation-direction" restriction="enum" version="3.0" browsers="E,C43,FF16,IE10,O12.1,S9" ref="http://www.w3.org/TR/css3-animations/#animation-direction" syntax="div { $(name): normal; }">
<desc>Defines whether or not the animation should play in reverse on alternate cycles.</desc>
<values>
<value name="alternate" version="3.0" browsers="all">
<desc>The animation cycle iterations that are odd counts are played in the normal direction, and the animation cycle iterations that are even counts are played in a reverse direction.</desc>
</value>
<value name="alternate-reverse" version="3.0" browsers="all">
<desc>The animation cycle iterations that are odd counts are played in the reverse direction, and the animation cycle iterations that are even counts are played in a normal direction.</desc>
</value>
<value name="normal" version="3.0" browsers="all">
<desc>Normal playback.</desc>
</value>
<value name="reverse" version="3.0" browsers="all">
<desc>All iterations of the animation are played in the reverse direction from the way they were specified.</desc>
</value>
</values>
</entry>
<entry name="animation-duration" restriction="time" version="3.0" browsers="E,C43,FF16,IE10,O12.1,S9" ref="http://www.w3.org/TR/css3-animations/#animation-duration" syntax="div { $(name): 4s; }">
<desc>Defines the length of time that an animation takes to complete one cycle.</desc>
</entry>
<entry name="animation-fill-mode" restriction="enum" version="3.0" browsers="E,C43,FF16,IE10,O12.1,S9" ref="http://www.w3.org/TR/css3-animations/#animation-fill-mode-property" syntax="div { $(name): forwards; }">
<desc>Defines what values are applied by the animation outside the time it is executing.</desc>
<values>
<value name="backwards" version="3.0" browsers="all">
<desc>The beginning property value (as defined in the first @keyframes at-rule) is applied before the animation is displayed, during the period defined by 'animation-delay'.</desc>
</value>
<value name="both" version="3.0" browsers="all">
<desc>Both forwards and backwards fill modes are applied.</desc>
</value>
<value name="forwards" version="3.0" browsers="all">
<desc>The final property value (as defined in the last @keyframes at-rule) is maintained after the animation completes.</desc>
</value>
<value name="none" version="3.0" browsers="all">
<desc>There is no change to the property value between the time the animation is applied and the time the animation begins playing or after the animation completes.</desc>
</value>
</values>
</entry>
<entry name="animation-iteration-count" restriction="number, enum" version="3.0" browsers="E,C43,FF16,IE10,O12.1,S9" ref="http://www.w3.org/TR/css3-animations/#animation-iteration-count" syntax="div { $(name): 3; }">
<desc>Defines the number of times an animation cycle is played. The default value is one, meaning the animation will play from beginning to end once.</desc>
<values>
<value name="infinite" version="3.0" browsers="all">
<desc>Causes the animation to repeat forever.</desc>
</value>
</values>
</entry>
<entry name="animation-name" restriction="identifier, enum" version="3.0" browsers="E,C43,FF16,IE10,O12.1,S9" ref="http://www.w3.org/TR/css3-animations/#the-animation-name-property-" syntax="div { $(name): movearound; }">
<desc>Defines a list of animations that apply. Each name is used to select the keyframe at-rule that provides the property values for the animation.</desc>
<values>
<value name="none" version="3.0" browsers="all">
<desc>No animation is performed</desc>
</value>
</values>
</entry>
<entry name="animation-play-state" restriction="enum" version="3.0" browsers="E,C43,FF16,IE10,O12.1,S9" ref="http://www.w3.org/TR/css3-animations/#animation-play-state" syntax="div { $(name): running; }">
<desc>Defines whether the animation is running or paused.</desc>
<values>
<value name="paused" version="3.0" browsers="all">
<desc>A running animation will be paused.</desc>
</value>
<value name="running" version="3.0" browsers="all">
<desc>Resume playback of a paused animation.</desc>
</value>
</values>
</entry>
<entry name="animation-timing-function" restriction="timing-function" version="3.0" browsers="E,C43,FF16,IE10,O12.1,S9" ref="http://www.w3.org/TR/css3-animations/#animation-timing-function" syntax="div { $(name): ease; }">
<desc>Describes how the animation will progress over one cycle of its duration.</desc>
</entry>
<entry name="backdrop-filter" restriction="enum, url" version="4.0" browsers="none" ref="https://drafts.fxtf.org/filters-2/#propdef-backdrop-filter" syntax="div { $(name): blur(2px); }">
<desc>Applies a filter effect where the first filter in the list takes the element's background image as the input image.</desc>
<values>
<value name="none" version="3.0" browsers="all">
<desc>No filter effects are applied.</desc>
</value>
<value name="blur()" version="3.0" browsers="all">
<desc>Applies a Gaussian blur to the input image.</desc>
</value>
<value name="brightness()" version="3.0" browsers="all">
<desc>Applies a linear multiplier to input image, making it appear more or less bright.</desc>
</value>
<value name="contrast()" version="3.0" browsers="all">
<desc>Adjusts the contrast of the input.</desc>
</value>
<value name="drop-shadow()" version="3.0" browsers="all">
<desc>Applies a drop shadow effect to the input image.</desc>
</value>
<value name="grayscale()" version="3.0" browsers="all">
<desc>Converts the input image to grayscale.</desc>
</value>
<value name="hue-rotate()" version="3.0" browsers="all">
<desc>Applies a hue rotation on the input image. </desc>
</value>
<value name="invert()" version="3.0" browsers="all">
<desc>Inverts the samples in the input image.</desc>
</value>
<value name="opacity()" version="3.0" browsers="all">
<desc>Applies transparency to the samples in the input image.</desc>
</value>
<value name="saturate()" version="3.0" browsers="all">
<desc>Saturates the input image.</desc>
</value>
<value name="sepia()" version="3.0" browsers="all">
<desc>Converts the input image to sepia.</desc>
</value>
<value name="url()" version="3.0" browsers="all">
<desc>A filter reference to a <filter> element.</desc>
</value>
</values>
</entry>
<entry name="backface-visibility" restriction="enum" version="3.0" browsers="E,C36,FF16,IE10,O23" ref="http://www.w3.org/TR/css3-transforms/#backface-visibility-property" syntax="div { $(name): hidden; }">
<desc>Determines whether or not the 'back' side of a transformed element is visible when facing the viewer. With an identity transform, the front side of an element faces the viewer.</desc>
<values>
<value name="hidden" version="3.0" browsers="all">
<desc>Back side is hidden.</desc>
</value>
<value name="visible" version="3.0" browsers="all">
<desc>Back side is visible.</desc>
</value>
</values>
</entry>
<entry name="background" restriction="enum, image, color, position, length, repeat, percentage, box" version="1.0" browsers="all" ref="http://www.w3.org/TR/css3-background/#background" syntax="section { $(name): url(image.png) no-repeat #999; }">
<desc>Shorthand property for setting most background properties at the same place in the style sheet.</desc>
<values>
<value name="fixed" version="1.0" browsers="all">
<desc>The background is fixed with regard to the viewport. In paged media where there is no viewport, a 'fixed' background is fixed with respect to the page box and therefore replicated on every page.</desc>
</value>
<value name="local" version="3.0" browsers="all">
<desc>The background is fixed with regard to the element's contents: if the element has a scrolling mechanism, the background scrolls with the element's contents.</desc>
</value>
<value name="none" version="1.0" browsers="all">
<desc>A value of 'none' counts as an image layer but draws nothing.</desc>
</value>
<value name="scroll" version="1.0" browsers="all">
<desc>The background is fixed with regard to the element itself and does not scroll with its contents. (It is effectively attached to the element's border.)</desc>
</value>
</values>
</entry>
<entry name="background-attachment" restriction="enum" version="1.0" browsers="all" ref="http://www.w3.org/TR/css3-background/#the-background-attachment" syntax=".box { $(name): fixed; }">
<desc>Specifies whether the background images are fixed with regard to the viewport ('fixed') or scroll along with the element ('scroll') or its contents ('local').</desc>
<values>
<value name="fixed" version="1.0" browsers="all">
<desc>The background is fixed with regard to the viewport. In paged media where there is no viewport, a 'fixed' background is fixed with respect to the page box and therefore replicated on every page.</desc>
</value>
<value name="local" version="3.0" browsers="E,C,FF25,IE9,O11.5,S5">
<desc>The background is fixed with regard to the element’s contents: if the element has a scrolling mechanism, the background scrolls with the element’s contents.</desc>
</value>
<value name="scroll" version="1.0" browsers="all">
<desc>The background is fixed with regard to the element itself and does not scroll with its contents. (It is effectively attached to the element’s border.)</desc>
</value>
</values>
</entry>
<entry name="background-blend-mode" restriction="enum" version="3.0" browsers="C35,FF30,O22,S7.1" ref="http://www.w3.org/TR/compositing-1/#propdef-background-blend-mode" syntax="div { $(name): saturation; }">
<desc>Defines the blending mode of each background layer.</desc>
<values>
<value name="normal" version="3.0" browsers="all">
<desc>Default attribute which specifies no blending</desc>
</value>
<value name="multiply" version="3.0" browsers="all">
<desc>The source color is multiplied by the destination color and replaces the destination.</desc>
</value>
<value name="screen" version="3.0" browsers="all">
<desc>Multiplies the complements of the backdrop and source color values, then complements the result.</desc>
</value>
<value name="overlay" version="3.0" browsers="all">
<desc>Multiplies or screens the colors, depending on the backdrop color value.</desc>
</value>
<value name="darken" version="3.0" browsers="all">
<desc>Selects the darker of the backdrop and source colors.</desc>
</value>
<value name="lighten" version="3.0" browsers="all">
<desc>Selects the lighter of the backdrop and source colors.</desc>
</value>
<value name="color-dodge" version="3.0" browsers="all">
<desc>Brightens the backdrop color to reflect the source color.</desc>
</value>
<value name="color-burn" version="3.0" browsers="all">
<desc>Darkens the backdrop color to reflect the source color.</desc>
</value>
<value name="hard-light" version="3.0" browsers="all">
<desc>Multiplies or screens the colors, depending on the source color value.</desc>
</value>
<value name="soft-light" version="3.0" browsers="all">
<desc>Darkens or lightens the colors, depending on the source color value.</desc>
</value>
<value name="difference" version="3.0" browsers="all">
<desc>Subtracts the darker of the two constituent colors from the lighter color..</desc>
</value>
<value name="exclusion" version="3.0" browsers="all">
<desc>Produces an effect similar to that of the Difference mode but lower in contrast.</desc>
</value>
<value name="hue" version="3.0" browsers="C35,FF30,O22">
<desc>Creates a color with the hue of the source color and the saturation and luminosity of the backdrop color.</desc>
</value>
<value name="saturation" version="3.0" browsers="C35,FF30,O22">
<desc>Creates a color with the saturation of the source color and the hue and luminosity of the backdrop color.</desc>
</value>
<value name="color" version="3.0" browsers="C35,FF30,O22">
<desc>Creates a color with the hue and saturation of the source color and the luminosity of the backdrop color.</desc>
</value>
<value name="luminosity" version="3.0" browsers="C35,FF30,O22">
<desc>Creates a color with the luminosity of the source color and the hue and saturation of the backdrop color.</desc>
</value>
</values>
</entry>
<entry name="background-clip" restriction="box" version="3.0" browsers="E,C,FF4,IE9,O10.5,S3" ref="http://www.w3.org/TR/css3-background/#the-background-clip" syntax="header { $(name): border-box; }">
<desc>Determines the background painting area.</desc>
</entry>