{
  "Type selectors": {
    "syntax": "element",
    "groups": [
      "Basic Selectors",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/Type_selectors"
  },
  "Class selectors": {
    "syntax": ".class",
    "groups": [
      "Basic Selectors",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/Class_selectors"
  },
  "ID selectors": {
    "syntax": "#id",
    "groups": [
      "Basic Selectors",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/ID_selectors"
  },
  "Universal selectors": {
    "syntax": "*",
    "groups": [
      "Basic Selectors",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/Universal_selectors"
  },
  "Attribute selectors": {
    "syntax": "[attr=value]",
    "groups": [
      "Basic Selectors",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/Attribute_selectors"
  },
  "Selector list": {
    "syntax": ",",
    "groups": [
      "Grouping Selectors",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/Selector_list"
  },
  "Adjacent sibling combinator": {
    "syntax": "A + B",
    "groups": [
      "Combinators",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/Adjacent_sibling_combinator"
  },
  "General sibling combinator": {
    "syntax": "A ~ B",
    "groups": [
      "Combinators",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/General_sibling_combinator"
  },
  "Child combinator": {
    "syntax": "A > B",
    "groups": [
      "Combinators",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/Child_combinator"
  },
  "Descendant combinator": {
    "syntax": "A B",
    "groups": [
      "Combinators",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/Descendant_combinator"
  },
  "Column combinator": {
    "syntax": "A || B",
    "groups": [
      "Combinators",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/Column_combinator"
  },
  "Pseudo-classes": {
    "syntax": ":",
    "groups": [
      "Pseudo",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/Pseudo-classes"
  },
  "Pseudo-elements": {
    "syntax": "::",
    "groups": [
      "Pseudo",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/Pseudo-elements"
  },
  ":active": {
    "syntax": ":active",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:active"
  },
  ":any-link": {
    "syntax": ":any-link",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "experimental",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:any-link"
  },
  ":checked": {
    "syntax": ":checked",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:checked"
  },
  ":blank": {
    "syntax": ":blank",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "experimental",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:blank"
  },
  ":default": {
    "syntax": ":default",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:default"
  },
  ":defined": {
    "syntax": ":defined",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "experimental",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:defined"
  },
  ":dir": {
    "syntax": ":dir( ltr | rtl )",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:dir"
  },
  ":disabled": {
    "syntax": ":disabled",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:disabled"
  },
  ":empty": {
    "syntax": ":empty",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:empty"
  },
  ":enabled": {
    "syntax": ":enabled",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:enabled"
  },
  ":first": {
    "syntax": ":first",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:first"
  },
  ":first-child": {
    "syntax": ":first-child",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:first-child"
  },
  ":first-of-type": {
    "syntax": ":first-of-type",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:first-of-type"
  },
  ":fullscreen": {
    "syntax": ":fullscreen",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:fullscreen"
  },
  ":focus": {
    "syntax": ":focus",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:focus"
  },
  ":focus-visible": {
    "syntax": ":focus-visible",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "experimental",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:focus-visible"
  },
  ":focus-within": {
    "syntax": ":focus-within",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "experimental",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:focus-within"
  },
  ":has": {
    "syntax": ":has( <relative-selector-list> )",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "experimental",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:has"
  },
  ":host()": {
    "syntax": ":host( <compound-selector-list> )",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "experimental",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:host()"
  },
  ":host-context()": {
    "syntax": ":host-context( <compound-selector-list> )",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "experimental",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:host-context()"
  },
  ":hover": {
    "syntax": ":hover",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:hover"
  },
  ":indeterminate": {
    "syntax": ":indeterminate",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:indeterminate"
  },
  ":in-range": {
    "syntax": ":in-range",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:in-range"
  },
  ":invalid": {
    "syntax": ":invalid",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:invalid"
  },
  ":is": {
    "syntax": ":is( <complex-selector-list> )",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "experimental",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:is"
  },
  ":lang": {
    "syntax": ":lang( <language-code> )",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:lang"
  },
  ":last-child": {
    "syntax": ":last-child",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:last-child"
  },
  ":last-of-type": {
    "syntax": ":last-of-type",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:last-of-type"
  },
  ":left": {
    "syntax": ":left",
    "groups": [
      "Pseudo-classes",
      "Selectors",
      "CSS Pages"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:left"
  },
  ":link": {
    "syntax": ":link",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:link"
  },
  ":not": {
    "syntax": ":not( <complex-selector-list> )",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:not"
  },
  ":nth-child": {
    "syntax": ":nth-child( <nth> [ of <complex-selector-list> ]? )",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:nth-child"
  },
  ":nth-last-child": {
    "syntax": ":nth-last-child( <nth> [ of <complex-selector-list> ]? )",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:nth-last-child"
  },
  ":nth-last-of-type": {
    "syntax": ":nth-last-of-type( <nth> )",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:nth-last-of-type"
  },
  ":nth-of-type": {
    "syntax": ":nth-of-type( <nth> )",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:nth-of-type"
  },
  ":only-child": {
    "syntax": ":only-child",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:only-child"
  },
  ":only-of-type": {
    "syntax": ":only-of-type",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:only-of-type"
  },
  ":optional": {
    "syntax": ":optional",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:optional"
  },
  ":out-of-range": {
    "syntax": ":out-of-range",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:out-of-range"
  },
  ":placeholder-shown": {
    "syntax": ":placeholder-shown",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "experimental",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:placeholder-shown"
  },
  ":read-only": {
    "syntax": ":read-only",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:read-only"
  },
  ":read-write": {
    "syntax": ":read-write",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:read-write"
  },
  ":required": {
    "syntax": ":required",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:required"
  },
  ":right": {
    "syntax": ":right",
    "groups": [
      "Pseudo-classes",
      "Selectors",
      "CSS Pages"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:right"
  },
  ":root": {
    "syntax": ":root",
    "groups": [
      "Pseudo-classes",
      "Selectors",
      "CSS Pages"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:root"
  },
  ":scope": {
    "syntax": ":scope",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:scope"
  },
  ":target": {
    "syntax": ":target",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:target"
  },
  ":valid": {
    "syntax": ":valid",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:valid"
  },
  ":visited": {
    "syntax": ":visited",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:visited"
  },
  ":where": {
    "syntax": ":where( <complex-selector-list> )",
    "groups": [
      "Pseudo-classes",
      "Selectors"
    ],
    "status": "experimental",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:where"
  },
  "::-moz-progress-bar": {
    "syntax": "::-moz-progress-bar",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Mozilla Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-moz-progress-bar"
  },
  "::-moz-range-progress": {
    "syntax": "::-moz-range-progress",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Mozilla Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-moz-range-progress"
  },
  "::-moz-range-thumb": {
    "syntax": "::-moz-range-thumb",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Mozilla Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-moz-range-thumb"
  },
  "::-moz-range-track": {
    "syntax": "::-moz-range-track",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Mozilla Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-moz-range-track"
  },
  "::-ms-browse": {
    "syntax": "::-ms-browse",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Microsoft Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-ms-browse"
  },
  "::-ms-check": {
    "syntax": "::-ms-check",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Microsoft Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-ms-check"
  },
  "::-ms-clear": {
    "syntax": "::-ms-clear",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Microsoft Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-ms-clear"
  },
  "::-ms-expand": {
    "syntax": "::-ms-clear",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Microsoft Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-ms-expand"
  },
  "::-ms-fill": {
    "syntax": "::-ms-fill",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Microsoft Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-ms-fill"
  },
  "::-ms-fill-lower": {
    "syntax": "::-ms-fill-lower",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Microsoft Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-ms-fill-lower"
  },
  "::-ms-fill-upper": {
    "syntax": "::-ms-fill-upper",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Microsoft Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-ms-fill-upper"
  },
  "::-ms-reveal": {
    "syntax": "::-ms-reveal",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Microsoft Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-ms-reveal"
  },
  "::-ms-thumb": {
    "syntax": "::-ms-thumb",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Microsoft Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-ms-thumb"
  },
  "::-ms-ticks-after": {
    "syntax": "::-ms-ticks-after",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Microsoft Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-ms-ticks-after"
  },
  "::-ms-ticks-before": {
    "syntax": "::-ms-ticks-before",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Microsoft Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-ms-ticks-before"
  },
  "::-ms-tooltip": {
    "syntax": "::-ms-tooltip",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Microsoft Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-ms-tooltip"
  },
  "::-ms-track": {
    "syntax": "::-ms-track",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Microsoft Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-ms-track"
  },
  "::-ms-value": {
    "syntax": "::-ms-value",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "Microsoft Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-ms-value"
  },
  "::-webkit-progress-bar": {
    "syntax": "::-webkit-progress-bar",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "WebKit Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-webkit-progress-bar"
  },
  "::-webkit-progress-inner-value": {
    "syntax": "::-webkit-progress-inner-value",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "WebKit Extensions"
    ],
    "status": "nonstandard"
  },
  "::-webkit-progress-value": {
    "syntax": "::-webkit-progress-value",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "WebKit Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-webkit-progress-value"
  },
  "::-webkit-slider-runnable-track": {
    "syntax": "::-webkit-slider-runnable-track",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "WebKit Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-webkit-slider-runnable-track"
  },
  "::-webkit-slider-thumb": {
    "syntax": "::-webkit-slider-thumb",
    "groups": [
      "Pseudo-elements",
      "Selectors",
      "WebKit Extensions"
    ],
    "status": "nonstandard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::-webkit-slider-thumb"
  },
  "::after": {
    "syntax": "/* CSS3 syntax */\n::after\n\n/* CSS2 syntax */\n:after",
    "groups": [
      "Pseudo-elements",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::after"
  },
  "::backdrop": {
    "syntax": "::backdrop",
    "groups": [
      "Pseudo-elements",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::backdrop"
  },
  "::before": {
    "syntax": "/* CSS3 syntax */\n::before\n\n/* CSS2 syntax */\n:before",
    "groups": [
      "Pseudo-elements",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::before"
  },
  "::cue": {
    "syntax": "::cue | ::cue( <selector> )",
    "groups": [
      "Pseudo-elements",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::cue"
  },
  "::cue-region": {
    "syntax": "::cue-region | ::cue-region( <selector> )",
    "groups": [
      "Pseudo-elements",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::cue-region"
  },
  "::first-letter": {
    "syntax": "/* CSS3 syntax */\n::first-letter\n\n/* CSS2 syntax */\n:first-letter",
    "groups": [
      "Pseudo-elements",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::first-letter"
  },
  "::first-line": {
    "syntax": "/* CSS3 syntax */\n::first-line\n\n/* CSS2 syntax */\n:first-line",
    "groups": [
      "Pseudo-elements",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::first-line"
  },
  "::grammar-error": {
    "syntax": "::grammar-error",
    "groups": [
      "Pseudo-elements",
      "Selectors"
    ],
    "status": "experimental",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::grammar-error"
  },
  "::marker": {
    "syntax": "::marker",
    "groups": [
      "Pseudo-elements",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::marker"
  },
  "::part": {
    "syntax": "::part( <ident>+ )",
    "groups": [
      "Pseudo-elements",
      "Selectors"
    ],
    "status": "experimental",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::part"
  },
  "::placeholder": {
    "syntax": "::placeholder",
    "groups": [
      "Pseudo-elements",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::placeholder"
  },
  "::selection": {
    "syntax": "::selection",
    "groups": [
      "Pseudo-elements",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::selection"
  },
  "::slotted": {
    "syntax": "::slotted( <compound-selector-list> )",
    "groups": [
      "Pseudo-elements",
      "Selectors"
    ],
    "status": "standard",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::slotted"
  },
  "::spelling-error": {
    "syntax": "::spelling-error",
    "groups": [
      "Pseudo-elements",
      "Selectors"
    ],
    "status": "experimental",
    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::spelling-error"
  }
}