# Supported syntaxes > ⚠️ This is a basic implementation of support reference. Further improvements are pending. See comments on each section for details. > ⚠️ This page is auto-generated. Please, don't update any content between special comments. - [Atrules](#atrules) - [Functional pseudos](#functional-pseudos) - [Properties](#properties) ## Atrules At-rules with a custom parsing rules. In fact, any at-rule is supported but prelude and block are parsing with default rules. Validation support isn't supported for at-rules at the moment. - `@font-face` - `@import` - `@media` - `@page` - `@supports` ## Functional pseudos Functional pseudos with a custom parsing rule. Non-listed functional pseudos don't parse a content inside parentheses and represent it as a `Raw` node if any. There is no difference between pseudo class and pseudo element on parsing, like no validation for functional pseudos is supported at the moment. - `:dir()` - `:has()` - `:lang()` - `:matches()` - `:not()` - `:nth-child()` - `:nth-last-child()` - `:nth-last-of-type()` - `:nth-of-type()` - `:slotted()` ## Properties Support for a property means CSSTree has a grammar for such property, so its value can be checked (validated) for complience to spec or browser inplementations (for non-standart properties). The validation doesn't perform on parsing stage and should be done as a separate step using Lexer API. In other words any property value can be parsed with default parsing rules, but validation is possible for listed properties only. - `-moz-appearance` - `-moz-background-clip` - `-moz-binding` - `-moz-border-bottom-colors` - `-moz-border-left-colors` - `-moz-border-radius-bottomleft` - `-moz-border-radius-bottomright` - `-moz-border-radius-topleft` - `-moz-border-radius-topright` - `-moz-border-right-colors` - `-moz-border-top-colors` - `-moz-context-properties` - `-moz-float-edge` - `-moz-force-broken-image-icon` - `-moz-image-region` - `-moz-orient` - `-moz-osx-font-smoothing` - `-moz-outline-radius` - `-moz-outline-radius-bottomleft` - `-moz-outline-radius-bottomright` - `-moz-outline-radius-topleft` - `-moz-outline-radius-topright` - `-moz-stack-sizing` - `-moz-text-blink` - `-moz-user-focus` - `-moz-user-input` - `-moz-user-modify` - `-moz-user-select` - `-moz-window-dragging` - `-moz-window-shadow` - `-ms-filter` - `-ms-flex-align` - `-ms-flex-item-align` - `-ms-flex-line-pack` - `-ms-flex-negative` - `-ms-flex-order` - `-ms-flex-pack` - `-ms-flex-positive` - `-ms-flex-preferred-size` - `-ms-grid-column-align` - `-ms-grid-row-align` - `-ms-high-contrast-adjust` - `-ms-interpolation-mode` - `-ms-overflow-style` - `-ms-user-select` - `-webkit-appearance` - `-webkit-background-clip` - `-webkit-border-before` - `-webkit-border-before-color` - `-webkit-border-before-style` - `-webkit-border-before-width` - `-webkit-box-reflect` - `-webkit-column-break-after` - `-webkit-column-break-before` - `-webkit-column-break-inside` - `-webkit-font-smoothing` - `-webkit-line-clamp` - `-webkit-mask` - `-webkit-mask-attachment` - `-webkit-mask-box-image` - `-webkit-mask-clip` - `-webkit-mask-composite` - `-webkit-mask-image` - `-webkit-mask-origin` - `-webkit-mask-position` - `-webkit-mask-position-x` - `-webkit-mask-position-y` - `-webkit-mask-repeat` - `-webkit-mask-repeat-x` - `-webkit-mask-repeat-y` - `-webkit-overflow-scrolling` - `-webkit-print-color-adjust` - `-webkit-tap-highlight-color` - `-webkit-text-fill-color` - `-webkit-text-security` - `-webkit-text-stroke` - `-webkit-text-stroke-color` - `-webkit-text-stroke-width` - `-webkit-touch-callout` - `-webkit-user-drag` - `-webkit-user-select` - `align-content` - `align-items` - `align-self` - `alignment-baseline` - `all` - `animation` - `animation-delay` - `animation-direction` - `animation-duration` - `animation-fill-mode` - `animation-iteration-count` - `animation-name` - `animation-play-state` - `animation-timing-function` - `appearance` - `azimuth` - `backdrop-filter` - `backface-visibility` - `background` - `background-attachment` - `background-blend-mode` - `background-clip` - `background-color` - `background-image` - `background-origin` - `background-position` - `background-position-x` - `background-position-y` - `background-repeat` - `background-size` - `baseline-shift` - `behavior` - `block-size` - `border` - `border-block-end` - `border-block-end-color` - `border-block-end-style` - `border-block-end-width` - `border-block-start` - `border-block-start-color` - `border-block-start-style` - `border-block-start-width` - `border-bottom` - `border-bottom-color` - `border-bottom-left-radius` - `border-bottom-right-radius` - `border-bottom-style` - `border-bottom-width` - `border-collapse` - `border-color` - `border-image` - `border-image-outset` - `border-image-repeat` - `border-image-slice` - `border-image-source` - `border-image-width` - `border-inline-end` - `border-inline-end-color` - `border-inline-end-style` - `border-inline-end-width` - `border-inline-start` - `border-inline-start-color` - `border-inline-start-style` - `border-inline-start-width` - `border-left` - `border-left-color` - `border-left-style` - `border-left-width` - `border-radius` - `border-right` - `border-right-color` - `border-right-style` - `border-right-width` - `border-spacing` - `border-style` - `border-top` - `border-top-color` - `border-top-left-radius` - `border-top-right-radius` - `border-top-style` - `border-top-width` - `border-width` - `bottom` - `box-align` - `box-decoration-break` - `box-direction` - `box-flex` - `box-flex-group` - `box-lines` - `box-ordinal-group` - `box-orient` - `box-pack` - `box-shadow` - `box-sizing` - `break-after` - `break-before` - `break-inside` - `caption-side` - `caret-color` - `clear` - `clip` - `clip-path` - `clip-rule` - `color` - `column-count` - `column-fill` - `column-gap` - `column-rule` - `column-rule-color` - `column-rule-style` - `column-rule-width` - `column-span` - `column-width` - `columns` - `contain` - `content` - `counter-increment` - `counter-reset` - `cue` - `cue-after` - `cue-before` - `cursor` - `direction` - `display` - `display-inside` - `display-list` - `display-outside` - `dominant-baseline` - `empty-cells` - `fill` - `fill-opacity` - `fill-rule` - `filter` - `flex` - `flex-basis` - `flex-direction` - `flex-flow` - `flex-grow` - `flex-shrink` - `flex-wrap` - `float` - `font` - `font-family` - `font-feature-settings` - `font-kerning` - `font-language-override` - `font-size` - `font-size-adjust` - `font-stretch` - `font-style` - `font-synthesis` - `font-variant` - `font-variant-alternates` - `font-variant-caps` - `font-variant-east-asian` - `font-variant-ligatures` - `font-variant-numeric` - `font-variant-position` - `font-variation-settings` - `font-weight` - `glyph-orientation-horizontal` - `glyph-orientation-vertical` - `grid` - `grid-area` - `grid-auto-columns` - `grid-auto-flow` - `grid-auto-rows` - `grid-column` - `grid-column-end` - `grid-column-gap` - `grid-column-start` - `grid-gap` - `grid-row` - `grid-row-end` - `grid-row-gap` - `grid-row-start` - `grid-template` - `grid-template-areas` - `grid-template-columns` - `grid-template-rows` - `hanging-punctuation` - `height` - `hyphens` - `image-orientation` - `image-rendering` - `image-resolution` - `ime-mode` - `initial-letter` - `initial-letter-align` - `inline-size` - `isolation` - `justify-content` - `kerning` - `left` - `letter-spacing` - `line-break` - `line-height` - `line-height-step` - `list-style` - `list-style-image` - `list-style-position` - `list-style-type` - `margin` - `margin-block-end` - `margin-block-start` - `margin-bottom` - `margin-inline-end` - `margin-inline-start` - `margin-left` - `margin-right` - `margin-top` - `marker` - `marker-end` - `marker-mid` - `marker-start` - `mask` - `mask-border` - `mask-border-mode` - `mask-border-outset` - `mask-border-repeat` - `mask-border-slice` - `mask-border-source` - `mask-border-width` - `mask-clip` - `mask-composite` - `mask-image` - `mask-mode` - `mask-origin` - `mask-position` - `mask-repeat` - `mask-size` - `mask-type` - `max-block-size` - `max-height` - `max-inline-size` - `max-width` - `min-block-size` - `min-height` - `min-inline-size` - `min-width` - `mix-blend-mode` - `object-fit` - `object-position` - `offset` - `offset-anchor` - `offset-block-end` - `offset-block-start` - `offset-distance` - `offset-inline-end` - `offset-inline-start` - `offset-path` - `offset-position` - `offset-rotate` - `opacity` - `order` - `orphans` - `outline` - `outline-color` - `outline-offset` - `outline-style` - `outline-width` - `overflow` - `overflow-clip-box` - `overflow-wrap` - `overflow-x` - `overflow-y` - `padding` - `padding-block-end` - `padding-block-start` - `padding-bottom` - `padding-inline-end` - `padding-inline-start` - `padding-left` - `padding-right` - `padding-top` - `page-break-after` - `page-break-before` - `page-break-inside` - `pause` - `pause-after` - `pause-before` - `perspective` - `perspective-origin` - `pointer-events` - `position` - `quotes` - `resize` - `rest` - `rest-after` - `rest-before` - `right` - `ruby-align` - `ruby-merge` - `ruby-position` - `scroll-behavior` - `scroll-snap-coordinate` - `scroll-snap-destination` - `scroll-snap-points-x` - `scroll-snap-points-y` - `scroll-snap-type` - `scroll-snap-type-x` - `scroll-snap-type-y` - `shape-image-threshold` - `shape-margin` - `shape-outside` - `shape-rendering` - `speak` - `speak-as` - `src` - `stroke` - `stroke-dasharray` - `stroke-dashoffset` - `stroke-linecap` - `stroke-linejoin` - `stroke-miterlimit` - `stroke-opacity` - `stroke-width` - `tab-size` - `table-layout` - `text-align` - `text-align-last` - `text-anchor` - `text-combine-upright` - `text-decoration` - `text-decoration-color` - `text-decoration-line` - `text-decoration-skip` - `text-decoration-skip-ink` - `text-decoration-style` - `text-emphasis` - `text-emphasis-color` - `text-emphasis-position` - `text-emphasis-style` - `text-indent` - `text-justify` - `text-orientation` - `text-overflow` - `text-rendering` - `text-shadow` - `text-size-adjust` - `text-transform` - `text-underline-position` - `top` - `touch-action` - `transform` - `transform-box` - `transform-origin` - `transform-style` - `transition` - `transition-delay` - `transition-duration` - `transition-property` - `transition-timing-function` - `unicode-bidi` - `unicode-range` - `user-select` - `vertical-align` - `visibility` - `voice-balance` - `voice-duration` - `voice-family` - `voice-pitch` - `voice-range` - `voice-rate` - `voice-stress` - `voice-volume` - `white-space` - `widows` - `width` - `will-change` - `word-break` - `word-spacing` - `word-wrap` - `writing-mode` - `z-index` - `zoom`