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"groups": [      "Combinators",      "Selectors"    ],    "status": "standard",    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/Column_combinator"  },  ":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": 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"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",    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"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": 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"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"  },  "::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"  }}
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