| Selector | Level | WCSS | Supported |
|---|---|---|---|
| Adjacent Sibling selector | CSS 2 | No | Yes |
| Attribute and attribute selectors | CSS 2 | No | Yes |
| Attribute selectors with namespace | CSS 3 | No | Yes |
| Attribute start selector | CSS 3 | No | Yes |
| Attribute end selector | CSS 3 | No | Yes |
| Attribute contains selector | CSS 3 | No | Yes |
| Child selector | CSS 2 | No | Yes |
| Class selectors | CSS 1 | Yes | Yes |
| Descendant selectors | CSS 1 | Yes | Yes |
| ID selectors | CSS 1 | Yes | Yes |
| Universal Selector | CSS 2 | Yes | Yes |
| Type selectors | CSS 1 | Yes | Yes |
| Type selectors with namespace | CSS 3 | Yes | Yes |
| Negation pseudo-class :not() | CSS 3 | No | No |
| :active | CSS 1/2 | Optional | Yes |
| ::after, :after | CSS 2 | No | Yes |
| ::before, :before | CSS 2 | No | Yes |
| :checked | CSS 3 | No | Yes |
| :disabled | CSS 3 | No | Yes |
| :empty | CSS 3 | No | Yes |
| :enabled | CSS 3 | No | Yes |
| :first-child | CSS 2 | No | Yes |
| ::first-letter, :first-letter | CSS 1 | No | Yes |
| ::first-line, :first-line | CSS 1 | No | Yes |
| :first-of-type | CSS 3 | No | No |
| :focus | CSS 2 | Optional | Yes |
| :hover | CSS 2 | No | Yes |
| :lang() | CSS 2 | No | Yes |
| :link | CSS 1/2 | Optional | Yes |
| :last-child | CSS 3 | No | No |
| :last-of-type | CSS 3 | No | No |
| :nth-child() | CSS 3 | No | No |
| :nth-last-child() | CSS 3 | No | No |
| :nth-of-type() | CSS 3 | No | No |
| :nth-last-of-type() | CSS 3 | No | No |
| :only-child | CSS 3 | No | No |
| :only-of-type | CSS 3 | No | No |
| :root | CSS 3 | No | No |
| ::selection | CSS 3 | No | No |
| :target | CSS 3 | No | No |
| :visited | CSS 1/2 | Optional | Yes |
| Property | Level | WCSS | Supported |
|---|---|---|---|
| azimuth | CSS 2† | No | No |
| background | CSS 1 | Yes | Yes |
| background-attachment | CSS 1 | Yes | Yes |
| background-color | CSS 1 | Yes | Yes |
| background-image | CSS 1 | Yes | Yes |
| background-position | CSS 1 | Optional | Yes |
| background-repeat | CSS 1 | Yes | Yes |
| border | CSS 1 | Yes | Yes |
| border-bottom | CSS 1 | Yes | Yes |
| border-bottom-color | CSS 1 | Yes | Yes |
| border-bottom-style | CSS 1 | Yes | Yes |
| border-bottom-width | CSS 1 | Yes | Yes |
| border-collapse | CSS 2 | No | Yes |
| border-color | CSS 1 | Yes | Yes |
| border-left | CSS 1 | Yes | Yes |
| border-left-color | CSS 1 | Yes | Yes |
| border-left-style | CSS 1 | Yes | Yes |
| border-left-width | CSS 1 | Yes | Yes |
| border-right | CSS 1 | Yes | Yes |
| border-right-color | CSS 1 | Yes | Yes |
| border-right-style | CSS 1 | Yes | Yes |
| border-right-width | CSS 1 | Yes | Yes |
| border-spacing | CSS 2 | No | Yes |
| border-style | CSS 1 | Yes | Yes |
| border-top | CSS 1 | Yes | Yes |
| border-top-color | CSS 1 | Yes | Yes |
| border-top-style | CSS 1 | Yes | Yes |
| border-top-width | CSS 1 | Yes | Yes |
| border-width | CSS 1 | Yes | Yes |
| bottom | CSS 2 | No | Yes |
| box-sizing | CSS 3 | No | Yes |
| caption-side | CSS 2‡ | No | Yes |
| clear | CSS 1 | Yes | Yes |
| clip | CSS 2 | No | Yes |
| color | CSS 1 | Yes | Yes |
| content | CSS 2 | No | Yes |
| counter-increment | CSS 2 | No | Yes |
| counter-reset | CSS 2 | No | Yes |
| cue | CSS2†/3 | No | Yes |
| cue-after | CSS2†/3 | No | Yes |
| cue-before | CSS2†/3 | No | Yes |
| cursor | CSS 2 | No | Yes |
| direction | CSS 2 | No | Yes |
| display | CSS 1/2‡ | Partial | Yes |
| elevation | CSS 2† | No | No |
| empty-cells | CSS 2 | No | Yes |
| float | CSS 1 | Yes | Yes |
| font | CSS 1 | Yes | Yes |
| font-family | CSS 1 | Yes | Yes |
| font-size | CSS 1 | Yes | Yes |
| font-size-adjust | CSS 2† | No | No |
| font-stretch | CSS 2† | No | No |
| font-style | CSS 1 | Yes | Yes |
| font-variant | CSS 1 | Yes | Yes |
| font-weight | CSS 1 | Yes | Yes |
| height | CSS 1 | Yes | Yes |
| (-xv-)interpret-as | CSS 3 | No | Yes |
| left | CSS 2 | No | Yes |
| letter-spacing | CSS 1 | No | Yes |
| line-height | CSS 1 | No | Yes |
| list-style | CSS 1/2‡ | Partial | Partial |
| list-style-image | CSS 1 | Yes | Yes |
| list-style-position | CSS 1 | Yes | Yes |
| list-style-type | CSS 1/2‡ | Partial | Partial |
| margin | CSS 1 | Optional | Yes |
| margin-bottom | CSS 1 | Yes | Yes |
| margin-left | CSS 1 | Yes | Yes |
| margin-right | CSS 1 | Yes | Yes |
| margin-top | CSS 1 | Yes | Yes |
| marker-offset | CSS 2† | No | No |
| marks | CSS 2† | No | No |
| max-height | CSS 2 | No | Yes |
| max-width | CSS 2 | No | Yes |
| min-height | CSS 2 | No | Yes |
| min-width | CSS 2 | No | Yes |
| opacity | CSS 3 | No | Yes |
| orphans | CSS 2 | No | Yes |
| outline | CSS 2 | No | Yes |
| outline-color | CSS 2 | No | Yes |
| outline-style | CSS 2 | No | Yes |
| outline-width | CSS 2 | No | Yes |
| overflow | CSS 2 | No | Yes |
| padding | CSS 1 | Optional | Yes |
| padding-bottom | CSS 1 | Yes | Yes |
| padding-left | CSS 1 | Yes | Yes |
| padding-right | CSS 1 | Yes | Yes |
| padding-top | CSS 1 | Yes | Yes |
| page | CSS 2† | No | No |
| page-break-after | CSS 2 | No | Yes |
| page-break-before | CSS 2 | No | Yes |
| page-break-inside | CSS 2 | No | Yes |
| pause | CSS 2†/3 | No | Yes |
| pause-after | CSS 2†/3 | No | Yes |
| pause-before | CSS 2†/3 | No | Yes |
| (-xv-)phonemes | CSS 3 | No | Yes |
| pitch | CSS 2† | No | No |
| pitch-range | CSS 2† | No | No |
| play-during | CSS 2† | No | No |
| position | CSS 2 | No | Yes |
| quotes | CSS 2 | No | Yes |
| richness | CSS 2† | No | No |
| right | CSS 2 | No | Yes |
| size | CSS 2 | No | Yes |
| speak | CSS 2†/3 | No | Yes |
| speak-header | CSS 2† | No | No |
| speak-numeral | CSS 2† | No | No |
| speak-punctuation | CSS 2† | No | No |
| speech-rate | CSS 2† | No | No |
| stress | CSS 2† | No | No |
| table-layout | CSS 2 | No | Yes |
| text-align | CSS 1/2‡ | Yes* | Yes |
| text-decoration | CSS 1 | Optional* | Yes |
| text-indent | CSS 1 | Yes | Yes |
| text-shadow | CSS 2† | No | No |
| text-transform | CSS 1 | Yes | Yes |
| top | CSS 2 | No | Yes |
| unicode-bidi | CSS 2 | No | Yes |
| vertical-align | CSS 1 | Yes | Yes |
| visibility | CSS 2 | Yes* | Yes |
| (-xv-)voice-balance | CSS 3 | No | Yes |
| (-xv-)voice-duration | CSS 3 | No | Yes |
| voice-family | CSS 2†/3 | No | Yes |
| (-xv-)voice-pitch | CSS 3 | No | Yes |
| (-xv-)voice-pitch-range | CSS 3 | No | Yes |
| (-xv-)voice-rate | CSS 3 | No | Yes |
| (-xv-)voice-stress | CSS 3 | No | Yes |
| (-xv-)voice-volume | CSS 3 | No | Yes |
| volume | CSS 2† | No | No |
| white-space | CSS 1/2.1 | Yes | Yes |
| widows | CSS 2 | No | Yes |
| width | CSS 1 | Yes | Yes |
| word-spacing | CSS 1 | No | Yes |
| z-index | CSS 2 | No | Yes |
| -o-link | No | No | Yes |
| -o-link-source | No | No | Yes |
| -o-text-overflow | No | No | Yes |
| -wap-accesskey | No | Yes | Yes |
| -wap-input-format | No | Yes | Yes |
| -wap-input-required | No | Yes | Yes |
| -wap-marquee | No | Yes | Yes |
| -wap-marquee-dir | No | Optional | Yes |
| -wap-marquee-loop | No | Optional | Yes |
| -wap-marquee-speed | No | Optional | Yes |
| -wap-marquee-style | No | Optional | Yes |