| CSS Level | Property Name | Description | Ref | Remark | |
|---|
| 3 | @font-feature-values | to set the font-feature-values property of an element | | ooo | last updated 7/11/2016 |
| 3 | @keyframes | to set the @keyframes of an element | | ooo | last updated 7/11/2016 |
| 3 | align-content | to set the content alignment property of an element | | ooo | last updated 7/11/2016 |
| 3 | align-items | to set the element alignment property of an element | | ooo | last updated 7/11/2016 |
| 3 | align-self | to set the alignment property of an element with respect to the parent element | | ooo | last updated 7/11/2016 |
| 3 | animation | shorthand to set the animation property of an element | | ooo | last updated 7/11/2016 |
| 3 | animation-delay | to set the animation-delay property of an element | | ooo | last updated 7/11/2016 |
| 3 | animation-direction | to set the animation-direction property of an element | | ooo | last updated 7/11/2016 |
| 3 | animation-duration | to set the animation-duration property of an element | | ooo | last updated 7/11/2016 |
| 3 | animation-fill-mode | to set the animation-fill-mode of an element | | ooo | last updated 7/11/2016 |
| 3 | animation-iteration-count | to set the animation-iteration-count of an element | | ooo | last updated 7/11/2016 |
| 3 | animation-name | to set the animation-name of an element | | ooo | last updated 7/11/2016 |
| 3 | animation-play-state | to set the animation-play-state of an element | | ooo | last updated 7/11/2016 |
| 3 | animation-timing-function | to set the animation-timing-function of an element | | ooo | last updated 7/11/2016 |
| 3 | backface-visibility | to set the backface-visibility of an element | | ooo | last updated 7/11/2016 |
| 3 | background-blend-mode | to set the blending mode of each background layer (color/image) | | ooo | last updated 7/11/2016 |
| 3 | background-clip | to set the clipped background area of an element | | ooo | last updated 7/11/2016 |
| 3 | background-origin | to set the origin of background image with repect to an element | | ooo | last updated 7/11/2016 |
| 3 | background-size | to set the size of the background image with respect to an element | | ooo | last updated 7/11/2016 |
| 3 | border-bottom-left-radius | to set the border bottom-left corner shape of an element | | ooo | last updated 7/11/2016 |
| 3 | border-bottom-right-radius | to set the border bottom-right corner shape of an element | | ooo | last updated 7/11/2016 |
| 3 | border-image | shorthand to set the border-image properties of an element | | ooo | last updated 7/11/2016 |
| 3 | border-image-outset | to set the border-image outsets of an element | | ooo | last updated 7/11/2016 |
| 3 | border-image-repeat | to set the border-image repeating method of an element | | ooo | last updated 7/11/2016 |
| 3 | border-image-slice | to set the border-image slicing method of an element | | ooo | last updated 7/11/2016 |
| 3 | border-image-source | to set the border-image source of an element | | ooo | last updated 7/11/2016 |
| 3 | border-image-width | to set the border-image width of an element | | ooo | last updated 7/11/2016 |
| 3 | border-radius | to set the border radius of an element | | ooo | last updated 7/11/2016 |
| 3 | border-top-left-radius | to set the border-top left radius of an element | | ooo | last updated 7/11/2016 |
| 3 | border-top-right-radius | to set the border-top right radius of an element | | ooo | last updated 7/11/2016 |
| 3 | box-decoration-break | to set the box breaking method of an element | | ooo | last updated 7/11/2016 |
| 3 | box-shadow | to set the box shadow of an element | | ooo | last updated 7/11/2016 |
| 3 | box-sizing | to set the box-sizing of an element | | ooo | last updated 7/11/2016 |
| 3 | break-after | to set the break-after property of an element | | ooo | last updated 7/11/2016 |
| 3 | break-before | to set the break-before property of an element | | ooo | last updated 7/11/2016 |
| 3 | break-inside | to set the break-inside property of an element | | ooo | last updated 7/11/2016 |
| 3 | column-count | to set the column-count of an element | | ooo | last updated 7/11/2016 |
| 3 | column-fill | to set the column-fill property of an element | | ooo | last updated 7/11/2016 |
| 3 | column-gap | to set the column-gap of an element | | ooo | last updated 7/11/2016 |
| 3 | column-rule | to set the column-rule property of an element | | ooo | last updated 7/11/2016 |
| 3 | column-rule-color | to set the column-rule-color of an element | | ooo | last updated 7/11/2016 |
| 3 | column-rule-style | to set the column-rule-style of an element | | ooo | last updated 7/11/2016 |
| 3 | column-rule-width | to set the column-rule-width of an element | | ooo | last updated 7/11/2016 |
| 3 | columns | shorthand to set the column property of an element | | ooo | last updated 7/11/2016 |
| 3 | column-span | to set the column-span of an element | | ooo | last updated 7/11/2016 |
| 3 | column-width | to set the column-width of an element | | ooo | last updated 7/11/2016 |
| 3 | filter | to set the filter property of an element | | ooo | last updated 7/11/2016 |
| 3 | flex | to set flex properties of an element | | ooo | last updated 7/11/2016 |
| 3 | flex-basis | to set the flex-basic length of an element | | ooo | last updated 7/11/2016 |
| 3 | flex-direction | to set the flex-direction of an element | | ooo | last updated 7/11/2016 |
| 3 | flex-flow | shorthand to set the flex-direction and the flex-wrap properties of an element | | ooo | last updated 7/11/2016 |
| 3 | flex-grow | to set the flex-grow of an element with respect to another element in the parent element | | ooo | last updated 7/11/2016 |
| 3 | flex-shrink | to set the flex-shrink of an element with respect to another element in the parent element | | ooo | last updated 7/11/2016 |
| 3 | flex-wrap | to set the flex-wrap property of an element | | ooo | last updated 7/11/2016 |
| 3 | font-feature-settings | to set font-feature-settings of an element | | ooo | last updated 7/11/2016 |
| 3 | font-kerning | to set font-kerning property of an element | | ooo | last updated 7/11/2016 |
| 3 | font-language-override | to set font-language-override property of an element | | ooo | last updated 7/11/2016 |
| 3 | font-synthesis | to set the text font-synthesis of an element | | ooo | last updated 7/11/2016 |
| 3 | font-variant-alternates | to set the text font-variant alternates of an element | | ooo | last updated 7/11/2016 |
| 3 | font-variant-caps | to set the text font-variant-caps of an element | | ooo | last updated 7/11/2016 |
| 3 | font-variant-east-asian | to set the text font-variant-east-asian of an element | | ooo | last updated 7/11/2016 |
| 3 | font-variant-ligatures | to set the text font-variant-ligatures of an element | | ooo | last updated 7/11/2016 |
| 3 | font-variant-numeric | to set the text font-vvariant-numeric of an element | | ooo | last updated 7/11/2016 |
| 3 | font-variant-position | to set the text font-vvariant-position of an element | | ooo | last updated 7/11/2016 |
| 3 | hanging-punctuation | to set the hanging-punctuation property of an element | | ooo | last updated 7/11/2016 |
| 3 | hyphens | to set the hanging-hyphen property of an element | | ooo | last updated 7/11/2016 |
| 3 | image-orientation | to set the image-orientation of an element | | ooo | last updated 7/11/2016 |
| 3 | image-rendering | to set the image-rendering of an element | | ooo | last updated 7/11/2016 |
| 3 | image-resolution | to set the image-resolution of an element | | ooo | last updated 7/11/2016 |
| 3 | ime-mode | to set the text input method editor mode of an element | | ooo | last updated 7/11/2016 |
| 3 | justify-content | to set the justify-content alignment property of an element | | ooo | last updated 7/11/2016 |
| 3 | line-break | to set the line-break property of an element | | ooo | last updated 7/11/2016 |
| 3 | mark | shorthand to set the mark property of an element | | ooo | last updated 7/11/2016 |
| 3 | mark-after | to set the mark-after property of an element | | ooo | last updated 7/11/2016 |
| 3 | mark-before | to set the mark-before property of an element | | ooo | last updated 7/11/2016 |
| 3 | marquee-direction | to set the marquee-direction of an element | | ooo | last updated 7/11/2016 |
| 3 | marquee-play-count | to set the marquee-play-count of an element | | ooo | last updated 7/11/2016 |
| 3 | marquee-speed | to set the marquee-speed of an element | | ooo | last updated 7/11/2016 |
| 3 | marquee-style | to set the marquee-style of an element | | ooo | last updated 7/11/2016 |
| 3 | mask | to set the mask of an element | | ooo | last updated 7/11/2016 |
| 3 | mask-type | to set the mask-type of an element | | ooo | last updated 7/11/2016 |
| 3 | nav-down | to set the navigating arrow-down key property of an element | | ooo | last updated 7/11/2016 |
| 3 | nav-index | to set the navigating tabbing index order of an element | | ooo | last updated 7/11/2016 |
| 3 | nav-left | to set the navigating arrow-left key property of an element | | ooo | last updated 7/11/2016 |
| 3 | nav-right | to set the navigating arrow-right key property of an element | | ooo | last updated 7/11/2016 |
| 3 | nav-up | to set the navigating arrow-up key property of an element | | ooo | last updated 7/11/2016 |
| 3 | object-fit | to set the object-fit of an element | | ooo | last updated 7/11/2016 |
| 3 | object-position | to set the object-position of an element | | ooo | last updated 7/11/2016 |
| 3 | opacity | to set the opacity property of an element | Color3 | ooo | last updated 7/11/2016 |
| 3 | order | to set the arranging order of an element with respect to other elements in an parent element | | ooo | last updated 7/11/2016 |
| 3 | outline-offset | to set the outline-offset of an element | | ooo | last updated 7/11/2016 |
| 3 | overflow-wrap | to set the overflow-wrap property of an element | | ooo | last updated 7/11/2016 |
| 3 | overflow-x | to set the horizontal overflow control of an element | | ooo | last updated 7/11/2016 |
| 3 | overflow-y | to set the vertical overflow control of an element | | ooo | last updated 7/11/2016 |
| 3 | perspective | to set the 3D perspective of an element | | ooo | last updated 7/11/2016 |
| 3 | perspective-origin | to set the 3D perspective-origin of an element | | ooo | last updated 7/11/2016 |
| 3 | phonemes | to set the text phonetic pronunciation phoneme of an element | | ooo | last updated 7/11/2016 |
| 3 | resize | to set the resize property of an element | | ooo | last updated 7/11/2016 |
| 3 | rest | shorthand to set the rest property of an element | | ooo | last updated 7/11/2016 |
| 3 | rest-after | to set the text prosodic boundary rest after property of an element | | ooo | last updated 7/11/2016 |
| 3 | rest-before | to set the text prosodic boundary rest before property of an element | | ooo | last updated 7/11/2016 |
| 3 | tab-size | to set the tab-size of an element | | ooo | last updated 7/11/2016 |
| 3 | text-align-last | to set the horizontal text ending alignment property of an element | | ooo | last updated 7/11/2016 |
| 3 | text-combine-upright | to set the text-combine-upright property of an element | | ooo | last updated 7/11/2016 |
| 3 | text-decoration-color | to set the extra text-decoration color of an element | | ooo | last updated 7/11/2016 |
| 3 | text-decoration-line | to set the text-decoration line property of an element | | ooo | last updated 7/11/2016 |
| 3 | text-decoration-style | to set the extra text-decoration style of an element | | ooo | last updated 7/11/2016 |
| 3 | text-justify | to set the horizontal text justification method of an element | | ooo | last updated 7/11/2016 |
| 3 | text-orientation | to set the text-orientation of an element | | ooo | last updated 7/11/2016 |
| 3 | text-overflow | to set text-overflow property of an element | | ooo | last updated 7/11/2016 |
| 3 | text-shadow | to set the text shadow of an element | 2-1998 | ooo | last updated 7/11/2016 |
| 3 | text-underline-position | to set the text decoration underline position of an element | | ooo | last updated 7/11/2016 |
| 3 | transform | to set the perspective transformation of an element | | ooo | last updated 7/11/2016 |
| 3 | transform-origin | to set the perspective transform-origin of an element | | ooo | last updated 7/11/2016 |
| 3 | transform-style | to set the perspective transform-style of an element | | ooo | last updated 7/11/2016 |
| 3 | transition | shorthand to set the transition property of an element | | ooo | last updated 7/11/2016 |
| 3 | transition-delay | to set the transition-delay of an element | | ooo | last updated 7/11/2016 |
| 3 | transition-duration | to set the transition-duration of an element | | ooo | last updated 7/11/2016 |
| 3 | transition-property | to set the transition item of an element | | ooo | last updated 7/11/2016 |
| 3 | transition-timing-function | to set the transition-timing-function of an element | | ooo | last updated 7/11/2016 |
| 3 | voice-balance | to set the left-right voice-balance of an element | | ooo | last updated 7/11/2016 |
| 3 | voice-duration | to set the voice-duration of an element | | ooo | last updated 7/11/2016 |
| 3 | voice-pitch | to set the average voice-pitch of an element | | ooo | last updated 7/11/2016 |
| 3 | voice-pitch-range | to set the average voice-pitch variation range of an element | | ooo | last updated 7/11/2016 |
| 3 | voice-rate | to set the average voice-rate of an element | | ooo | last updated 7/11/2016 |
| 3 | voice-stress | to set the voice-stress emphasis of an element | | ooo | last updated 7/11/2016 |
| 3 | voice-volume | to set the voice-volume amplitude of an element | | ooo | last updated 7/11/2016 |
| 3 | word-break | to set the word breaking property of an element | | ooo | last updated 7/11/2016 |
| 3 | word-wrap | to set the word-wrapping property of an element | | ooo | last updated 7/11/2016 |
| 3 | writing-mode | to set the writing-mode of an element | | ooo | last updated 7/11/2016 |
| 2-1998, 3 | marks | to set the mark property of an element | | ooo | last updated 7/11/2016 |
| 2.1, 2.2WD | Ignore | | | | last updated 1/21/2019 |
| 2.1, 2.2WD | Property | | | | last updated 1/21/2019 |
| 2.1 | - | | | | last updated 1/21/2019 |
| 2.1 | ( | | | | last updated 1/21/2019 |
| 2.1 | ) | | | | last updated 1/21/2019 |
| 2.1 | * | to match all elements | | | last updated 1/11/2019 |
| 2.1 | : | | | | last updated 1/21/2019 |
| 2.1 | :first-child | to select every <p> element that is the first child of its parent | | | last updated 1/11/2019 |
| 2.1 | :focus | to select the input element which has focus | | | last updated 1/11/2019 |
| 2.1 | :hover | to select links on mouse over | | | last updated 1/11/2019 |
| 2.1 | :lang(language) | to select every <p> element with a lang attribute equal to "it" (Italian) | | | last updated 1/11/2019 |
| 2.1 | ; | | | | last updated 1/21/2019 |
| 2.1 | @charset | to specify the character encoding of the style sheet itself | | | last updated 3/8/2019 |
| 2.1 | [ | | | | last updated 1/21/2019 |
| 2.1 | [attribute] | to match all elements with an "attribute" attribute | | | last updated 1/11/2019 |
| 2.1 | [attribute|=value] | to match all elements with [attribute] attribute starting with the word "value" of either exactly "value" or "value" immediately followed by "-". | | | last updated 1/11/2019 |
| 2.1 | [attribute~=value] | to match all elements with [attribute] attribute containing the word "value" | | | last updated 1/11/2019 |
| 2.1 | [attribute=value] | to match all elements with [attribute] attribute equal to "value" | | | last updated 1/11/2019 |
| 2.1 | ] | | | | last updated 1/21/2019 |
| 2.1 | _ | | | | last updated 1/21/2019 |
| 2.1 | { | | | | last updated 1/21/2019 |
| 2.1 | } | | | | last updated 1/21/2019 |
| 2.1 | -ah- | | | | last updated 1/21/2019 |
| 2.1 | any | | | | last updated 1/21/2019 |
| 2.1 | ATKEYWORD | | | | last updated 1/21/2019 |
| 2.1 | at-rule | | | | last updated 1/21/2019 |
| 2.1 | -atsc- | | | | last updated 1/21/2019 |
| 2.1 | BAD_COMMENT | | | | last updated 1/21/2019 |
| 2.1 | BAD_STRING | | | | last updated 1/21/2019 |
| 2.1 | BAD_URI | | | | last updated 1/21/2019 |
| 2.1 | badcomment | | | | last updated 1/21/2019 |
| 2.1 | badcomment1 | | | | last updated 1/21/2019 |
| 2.1 | badcomment2 | | | | last updated 1/21/2019 |
| 2.1 | badstring | | | | last updated 1/21/2019 |
| 2.1 | badstring1 | | | | last updated 1/21/2019 |
| 2.1 | badstring2 | | | | last updated 1/21/2019 |
| 2.1 | baduri | | | | last updated 1/21/2019 |
| 2.1 | baduri1 | | | | last updated 1/21/2019 |
| 2.1 | baduri2 | | | | last updated 1/21/2019 |
| 2.1 | baduri3 | | | | last updated 1/21/2019 |
| 2.1 | block | | | | last updated 1/21/2019 |
| 2.1 | CDC | | | | last updated 1/21/2019 |
| 2.1 | CDO | | | | last updated 1/21/2019 |
| 2.1 | COMMENT | | | | last updated 1/21/2019 |
| 2.1 | DASHMATCH | | | | last updated 1/21/2019 |
| 2.1 | declaration | | | | last updated 1/21/2019 |
| 2.1 | DELIM | | | | last updated 1/21/2019 |
| 2.1 | DIMENSION | | | | last updated 1/21/2019 |
| 2.1 | elementA+elementB | to match all <elementB> elements that are preceded immediately by the <elementA> element inside the same parent element. | | | last updated 1/11/2019 |
| 2.1 | elementA>elementB | to match all <elementB> elements that are direct children of the parent <elementA> element | | | last updated 1/11/2019 |
| 2.1 | escape | | | | last updated 1/21/2019 |
| 2.1 | FUNCTION | | | | last updated 1/21/2019 |
| 2.1 | HASH | | | | last updated 1/21/2019 |
| 2.1 | -hp- | | | | last updated 1/21/2019 |
| 2.1 | ident | | | | last updated 1/21/2019 |
| 2.1 | IDENT | | | | last updated 1/21/2019 |
| 2.1 | INCLUDES | | | | last updated 1/21/2019 |
| 2.1 | -khtml- | | | | last updated 1/21/2019 |
| 2.1 | -moz- | | | | last updated 1/21/2019 |
| 2.1 | -ms- | | | | last updated 1/21/2019 |
| 2.1 | mso- | | | | last updated 1/21/2019 |
| 2.1 | name | | | | last updated 1/21/2019 |
| 2.1 | nl | | | | last updated 1/21/2019 |
| 2.1 | nmchar | | | | last updated 1/21/2019 |
| 2.1 | nmstart | | | | last updated 1/21/2019 |
| 2.1 | nonascii | | | | last updated 1/21/2019 |
| 2.1 | num | | | | last updated 1/21/2019 |
| 2.1 | NUMBER | | | | last updated 1/21/2019 |
| 2.1 | -o- | | | | last updated 1/21/2019 |
| 2.1 | PERCENTAGE | | | | last updated 1/21/2019 |
| 2.1 | prince- | | | | last updated 1/21/2019 |
| 2.1 | property | | | | last updated 1/21/2019 |
| 2.1 | -rim- | | | | last updated 1/21/2019 |
| 2.1 | -ro- | | | | last updated 1/21/2019 |
| 2.1 | ruleset | | | | last updated 1/21/2019 |
| 2.1 | S | | | | last updated 1/21/2019 |
| 2.1 | selector | | | | last updated 1/21/2019 |
| 2.1 | statement | | | | last updated 1/21/2019 |
| 2.1 | string | | | | last updated 1/21/2019 |
| 2.1 | STRING | | | | last updated 1/21/2019 |
| 2.1 | string1 | | | | last updated 1/21/2019 |
| 2.1 | string2 | | | | last updated 1/21/2019 |
| 2.1 | stylesheet | | | | last updated 1/21/2019 |
| 2.1 | unicode | | | | last updated 1/21/2019 |
| 2.1 | UNICODE-RANGE | | | | last updated 1/21/2019 |
| 2.1 | unused | | | | last updated 1/21/2019 |
| 2.1 | URI | | | | last updated 1/21/2019 |
| 2.1 | value | | | | last updated 1/21/2019 |
| 2.1 | w | | | | last updated 1/21/2019 |
| 2.1 | -wap- | | | | last updated 1/21/2019 |
| 2.1 | -webkit- | | | | last updated 1/21/2019 |
| 2.1 | -xv- | | | | last updated 1/21/2019 |
| 2,3 | @font-face | to set the font-face property of an element | | ooo | last updated 7/11/2016 |
| 2,2.1 | @media | to specify some CSS rules for specified media types conditionally | | | last updated 3/8/2019 |
| 2,2.1 | @page | to specify some specific CSS rules for paged media. | | | last updated 3/8/2019 |
| 2, 2.1, 2.2WD | Ancestor | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Attribute | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Author | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Child | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Content | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Descendant | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Document language | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Document tree | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Element | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Following element | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Intrinsic dimensions | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Preceding element | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Rendered content | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Replaced element | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Sibling | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Source document | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Style sheet | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | User | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | User agent (UA) | | | | last updated 1/21/2019 |
| 2, 2.1, 2.2WD | Valid style sheet | | | | last updated 1/21/2019 |
| 2 | azimuth | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | border-collapse | to set the border-collapse property of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | border-spacing | to set the border-spacing property of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | bottom | to set the bottom position of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | caption-side | to set the caption-side of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | clip | to set the clipped area of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | content | to set the specified content of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | counter-increment | to set the counter-increment of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | counter-reset | to set the counter-reset of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | cue | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | cue-after | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | cue-before | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | cursor | to set the cursor of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | direction | to set the text flow direction of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | elevation | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | empty-cells | to set the empty-cells of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | font-size-adjust | to set the text font size adjustment of an element | 2-1998 | ooo | last updated 7/11/2016 |
| 2 | font-stretch | to set the text font stretch property of an element | 2-1998 | ooo | last updated 7/11/2016 |
| 2 | left | to set the left position of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | marker-offset | | 2-1998 | ooo | last updated 7/13/2016 |
| 2 | max-height | to set the maximum height of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | max-width | to set the maximum width of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | min-height | to set the minimum height of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | min-width | to set the minimum width of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | orphans | to set the orphan property of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | outline | to set the outline property of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | outline-color | to set the outline-color of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | outline-style | to set the outline-style of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | outline-width | to set the outline-width of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | overflow | to set the overflow control of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | page | | 2-1998 | ooo | last updated 7/13/2016 |
| 2 | page-break-after | to set the page-break-after property of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | page-break-before | to set the page-break-before property of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | page-break-inside | to set the page-break-inside property of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | pause | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | pause-after | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | pause-before | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | pitch | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | pitch-range | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | play-during | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | position | to set the positioning method of an element with respect to another element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | quotes | to set the quote of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | richness | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | right | to set the right position of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | size | | 2-1998 | ooo | last updated 7/13/2016 |
| 2 | speak | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | speak-header | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | speak-numeral | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | speak-punctuation | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | speech-rate | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | stress | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | table-layout | to set the table-layout of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | top | to set the top position of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | unicode-bidi | to set the text-unicode-bidi of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | visibility | to set the visibility property of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | voice-family | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | volume | | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | widows | to set the widow property of an element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 2 | z-index | to set the stack order of an element with respect with another element | 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | #id | to match all elements with an "id" id | | | last updated 1/11/2019 |
| 1,2.1 | .class | to match all elements with a "class" class | | | last updated 1/11/2019 |
| 1,2.1 | :active | to select the active link | | | last updated 1/11/2019 |
| 1,2.1 | :first-letter (::first-letter) | to select the first letter of every <p> element | | | last updated 1/11/2019 |
| 1,2.1 | :first-line (::first-line) | to select the first line of every <p> element | | | last updated 1/11/2019 |
| 1,2.1 | :link | to select all unvisited links | | | last updated 1/11/2019 |
| 1,2.1 | :visited | to select all visited links | | | last updated 1/11/2019 |
| 1,2.1 | background | shorthand to set the background properties of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | background-attachment | to set the background-attachment property (fixed or scrolls) of an element with respect to the page | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | background-color | to set the background color of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | background-image | to set one or more background images of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | background-position | to set the background image position of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | background-repeat | to set the background image repeating method of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | border | to set border properties of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | border-bottom | to set the border bottom properties of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | border-bottom-color | to set the border bottom color of an element | 2-1998, 2.1 | zzooo | last updated 7/11/2016 |
| 1,2.1 | border-bottom-style | to set the bottom border style of an element | 2-1998, 2.1 | zzooo | last updated 7/11/2016 |
| 1,2.1 | border-bottom-width | to set the bottom border width of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | border-color | to set the border color of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | border-left | to set the border left properties of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | border-left-color | to set the border left color of an element | 2-1998, 2.1 | zzooo | last updated 7/11/2016 |
| 1,2.1 | border-left-style | to set the border left style of an element | 2-1998, 2.1 | zzooo | last updated 7/11/2016 |
| 1,2.1 | border-left-width | to set the border left width of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | border-right | to set the border-right properties of an element | 1-1996, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | border-right-color | to set the border-right color of an element | 2-1998, 2.1 | zzooo | last updated 7/11/2016 |
| 1,2.1 | border-right-style | to set the border-right style of an element | 2-1998, 2.1 | zzooo | last updated 7/11/2016 |
| 1,2.1 | border-right-width | to set the border-right width of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | border-style | to set the border style of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | border-top | to set the border-top properties of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | border-top-color | to set the border-top color of an element | 2-1998, 2.1 | zzooo | last updated 7/11/2016 |
| 1,2.1 | border-top-style | to set the border-top style of an element | 2-1998, 2.1 | zzooo | last updated 7/11/2016 |
| 1,2.1 | border-top-width | to set the border-top width of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | border-width | to set the border width of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | clear | to set the cleared side of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | color | to set the foreground color of an element | 1-1996, 2-1998, 2.1, Color3 | ooo | last updated 7/11/2016 |
| 1,2.1 | display | to set the display type of an element with respect to another element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | elementA elementB | to match all <elementB> elements that are nested inside the <elementA> element | | | last updated 1/11/2019 |
| 1,2.1 | elementA,elementB,⋯ | to match all <elementA>, <elementB>, <⋯>, ⋯ elements | | | last updated 1/11/2019 |
| 1,2.1 | elementname | to match all <elementname> elements | | | last updated 1/11/2019 |
| 1,2.1 | float | to set the floating method of an element with respect to another element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | font | to set all the font properties of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | font-family | to set the font family property of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | font-size | to set the text font size of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | font-style | to set the text font style of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | font-variant | to set the text font-variant of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | font-weight | to set the text font-font-weight of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | height | to set the content height of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | letter-spacing | to set the extra letter-spacing of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | line-height | to set the line-height of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | list-style | to set the list-style of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | list-style-image | to set the list-style-image of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | list-style-position | to set the list-style-position of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | list-style-type | to set the list-style-type of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | margin | to set the margin of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | margin-bottom | to set the margin bottom of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | margin-left | to set the margin left of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | margin-right | to set the margin right of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | margin-top | to set the margin top of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | padding | to set the padding of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | padding-bottom | to set the padding bottom of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | padding-left | to set the padding left of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | padding-right | to set the padding right of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | padding-top | to set the padding top of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | text-align | to set the horizontal text alignment property of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | text-decoration | to set the extra text-decoration of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | text-indent | to set the horizontal text opening indentation property of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | text-transform | to set the text-transform property of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | vertical-align | to set the vertical alignment of an element with respect to another element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | white-space | to set the white-space property of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | width | to set the content width of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2.1 | word-spacing | to set the word spacing property of an element | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1,2,2.1 | @import | to specify those to be included external style sheets by importing | 1-1996, 2-1998, 2.1 | ooo | last updated 7/11/2016 |
| 1 | !important | | | | last updated 1/24/2019 |
| 1 | */ | | | | last updated 1/24/2019 |
| 1 | \* | | | | last updated 1/24/2019 |
| 1 | attribute | | | | last updated 1/23/2019 |
| 1 | author | | | | last updated 1/23/2019 |
| 1 | block-level element | | | | last updated 1/23/2019 |
| 1 | canvas | | | | last updated 1/23/2019 |
| 1 | child element | | | | last updated 1/23/2019 |
| 1 | contextual selector | | | | last updated 1/23/2019 |
| 1 | CSS | | | | last updated 1/23/2019 |
| 1 | CSS1 | | | | last updated 1/23/2019 |
| 1 | CSS1 advanced features | | | | last updated 1/23/2019 |
| 1 | CSS1 core features | | | | last updated 1/23/2019 |
| 1 | CSS1 parser | | | | last updated 1/23/2019 |
| 1 | declaration | | | | last updated 1/23/2019 |
| 1 | designer | | | | last updated 1/23/2019 |
| 1 | document | | | | last updated 1/23/2019 |
| 1 | element | | | | last updated 1/23/2019 |
| 1 | element type | | | | last updated 1/23/2019 |
| 1 | fictional tag sequence | | | | last updated 1/23/2019 |
| 1 | font size | | | | last updated 1/23/2019 |
| 1 | HTML | | | | last updated 1/23/2019 |
| 1 | HTML extension | | | | last updated 1/23/2019 |
| 1 | inline element | | | | last updated 1/23/2019 |
| 1 | intrinsic dimensions | | | | last updated 1/23/2019 |
| 1 | parent element | | | | last updated 1/23/2019 |
| 1 | property | | | | last updated 1/23/2019 |
| 1 | pseudo-class | | | | last updated 1/23/2019 |
| 1 | pseudo-element | | | | last updated 1/23/2019 |
| 1 | reader | | | | last updated 1/23/2019 |
| 1 | replaced element | | | | last updated 1/23/2019 |
| 1 | rule | | | | last updated 1/23/2019 |
| 1 | selector | | | | last updated 1/23/2019 |
| 1 | SGML | | | | last updated 1/23/2019 |
| 1 | simple selector | | | | last updated 1/23/2019 |
| 1 | single quotes ('...') | | | | last updated 1/23/2019 |
| 1 | style sheet | | | | last updated 1/23/2019 |
| 1 | UA | | | | last updated 1/23/2019 |
| 1 | user | | | | last updated 1/23/2019 |
| 1 | weight | | | | last updated 1/23/2019 |
| ::after (:after) | Insert something after the content of each <p> element | | | last updated 1/11/2019 |
| ::before (:before) | Insert something before the content of each <p> element | | | last updated 1/11/2019 |
| ::cue (:cue) | | | | last updated 1/11/2019 |
| ::grammar-error | | | | last updated 1/11/2019 |
| ::marker | | | | last updated 1/11/2019 |
| ::placeholder | to select input elements with placeholder text | | | last updated 1/11/2019 |
| ::selection | to select the portion of an element that is selected by a user | | | last updated 1/11/2019 |
| ::slotted() | | | | last updated 1/11/2019 |
| ::spelling-error | | | | last updated 1/11/2019 |
| :any-link | | | | last updated 1/11/2019 |
| :backdrop | | | | last updated 1/11/2019 |
| :blank | | | | last updated 1/11/2019 |
| :checked | to select every checked <input> element | | | last updated 1/11/2019 |
| :current | | | | last updated 1/11/2019 |
| :default | to select the default <input> element | | | last updated 1/11/2019 |
| :defined | | | | last updated 1/11/2019 |
| :dir() | | | | last updated 1/11/2019 |
| :disabled | to select every disabled <input> element | | | last updated 1/11/2019 |
| :drop | | | | last updated 1/11/2019 |
| :empty | to select every <p> element that has no children (including text nodes) | | | last updated 1/11/2019 |
| :enabled | to select every enabled <input> element | | | last updated 1/11/2019 |
| :first | | | | last updated 1/11/2019 |
| :first-of-type | to select every <p> element that is the first <p> element of its parent | | | last updated 1/11/2019 |
| :focus-visible | | | | last updated 1/11/2019 |
| :focus-within | | | | last updated 1/11/2019 |
| :fullscreen | | | | last updated 1/11/2019 |
| :future | | | | last updated 1/11/2019 |
| :has() | | | | last updated 1/11/2019 |
| :host | | | | last updated 1/11/2019 |
| :host() | | | | last updated 1/11/2019 |
| :host-context() | | | | last updated 1/11/2019 |
| :indeterminate | to select input elements that are in an indeterminate state | | | last updated 1/11/2019 |
| :in-range | to select input elements with a value within a specified range | | | last updated 1/11/2019 |
| :invalid | to select all input elements with an invalid value | | | last updated 1/11/2019 |
| :is() | | | | last updated 1/11/2019 |
| :last-child | to select every <p> element that is the last child of its parent | | | last updated 1/11/2019 |
| :last-of-type | to select every <p> element that is the last <p> element of its parent | | | last updated 1/11/2019 |
| :left | | | | last updated 1/11/2019 |
| :local-link | | | | last updated 1/11/2019 |
| :not(selector) | to select every element that is not a <p> element | | | last updated 1/11/2019 |
| :nth-child(n) | to select every <p> element that is the second child of its parent | | | last updated 1/11/2019 |
| :nth-last-child(n) | to select every <p> element that is the second child of its parent, counting from the last child | | | last updated 1/11/2019 |
| :nth-last-of-type(n) | to select every <p> element that is the second <p> element of its parent, counting from the last child | | | last updated 1/11/2019 |
| :nth-of-type(n) | to select every <p> element that is the second <p> element of its parent | | | last updated 1/11/2019 |
| :only-child | to select every <p> element that is the only child of its parent | | | last updated 1/11/2019 |
| :only-of-type | to select every <p> element that is the only <p> element of its parent | | | last updated 1/11/2019 |
| :optional | to select input elements with no "required" attribute | | | last updated 1/11/2019 |
| :out-of-range | to select input elements with a value outside a specified range | | | last updated 1/11/2019 |
| :past | | | | last updated 1/11/2019 |
| :placeholder-shown | | | | last updated 1/11/2019 |
| :read-only | to select input elements with the "readonly" attribute specified | | | last updated 1/11/2019 |
| :read-write | to select input elements with the "readonly" attribute NOT specified | | | last updated 1/11/2019 |
| :required | to select input elements with the "required" attribute specified | | | last updated 1/11/2019 |
| :right | | | | last updated 1/11/2019 |
| :root | to select the document's root element | | | last updated 1/11/2019 |
| :scope | | | | last updated 1/11/2019 |
| :target | to select the current active #news element (clicked on a URL containing that anchor name) | | | last updated 1/11/2019 |
| :target-within | | | | last updated 1/11/2019 |
| :user-invalid | | | | last updated 1/11/2019 |
| :valid | to select all input elements with a valid value | | | last updated 1/11/2019 |
| @namespace | to specify the XML namespaces to be used in a CSS style sheet. | | | last updated 3/8/2019 |
| [attribute$=value] | to match all elements with [attribute] attribute containing word ends with string "value" | | | last updated 1/11/2019 |
| [attribute*=value] | to match all elements with [attribute] attribute containing word with substring "value" at the start, end or in the middle of the word. | | | last updated 1/11/2019 |
| [attribute^=value] | to match all elements with [attribute] attribute containing word begins with string "value" | | | last updated 1/11/2019 |
| columnA||tablecellB | to match all <tablecellB> elements that belong to the scope of the <columnA> element. | | | last updated 1/11/2019 |
| elementA~elementB | to match all <elementB> elements that are preceded by the <elementA> element but not necessarily immediately inside the same parent element. | | | last updated 1/11/2019 |
| nth-col() | | | | last updated 1/11/2019 |
| nth-last-col() | | | | last updated 1/11/2019 |
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