Add initial CSS pseudoclasses

features/empty.yml

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+name: :empty
+description: The `:empty` CSS pseudo-class matches elements without child elements.
+spec: https://drafts.csswg.org/selectors-4/#the-empty-pseudo
+group: selectors
+status:
+  compute_from: css.selectors.empty
+compat_features:
+  - css.selectors.empty
+  - css.selectors.empty.matches_whitespace

features/empty.yml.dist

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+# Generated from: empty.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: high
+  baseline_low_date: 2015-07-29
+  baseline_high_date: 2018-01-29
+  support:
+    chrome: "1"
+    chrome_android: "18"
+    edge: "12"
+    firefox: "1"
+    firefox_android: "4"
+    safari: "3.1"
+    safari_ios: "2"
+compat_features:
+  # ⬇️ Same status as overall feature ⬇️
+  # baseline: high
+  # baseline_low_date: 2015-07-29
+  # baseline_high_date: 2018-01-29
+  # support:
+  #   chrome: "1"
+  #   chrome_android: "18"
+  #   edge: "12"
+  #   firefox: "1"
+  #   firefox_android: "4"
+  #   safari: "3.1"
+  #   safari_ios: "2"
+  - css.selectors.empty
+
+  # baseline: false
+  # support: {}
+  - css.selectors.empty.matches_whitespace

features/input-selectors.yml

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+name: Input selectors
+description: The `:checked`, `:disabled`, and `:enabled` CSS pseudo-classes match form elements based on their state.
+spec:
+  - https://drafts.csswg.org/selectors-4/#checked
+  - https://drafts.csswg.org/selectors-4/#enableddisabled
+group:
+  - forms
+  - selectors
+compat_features:
+  - css.selectors.checked
+  - css.selectors.disabled
+  - css.selectors.enabled

features/input-selectors.yml.dist

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+# Generated from: input-selectors.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: high
+  baseline_low_date: 2015-07-29
+  baseline_high_date: 2018-01-29
+  support:
+    chrome: "1"
+    chrome_android: "18"
+    edge: "12"
+    firefox: "1"
+    firefox_android: "4"
+    safari: "3.1"
+    safari_ios: "2"
+compat_features:
+  - css.selectors.checked
+  - css.selectors.disabled
+  - css.selectors.enabled

features/lang.yml

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+name: :lang()
+description: The `:lang()` CSS functional pseudo-class matches elements based on their content language.
+spec: https://drafts.csswg.org/selectors-4/#the-lang-pseudo
+group: selectors
+status:
+  compute_from: css.selectors.lang
+compat_features:
+  - css.selectors.lang
+  - css.selectors.lang.argument_list
+  - css.selectors.lang.wildcards

features/lang.yml.dist

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+# Generated from: lang.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: high
+  baseline_low_date: 2015-07-29
+  baseline_high_date: 2018-01-29
+  support:
+    chrome: "1"
+    chrome_android: "18"
+    edge: "12"
+    firefox: "1"
+    firefox_android: "4"
+    safari: "3.1"
+    safari_ios: "2"
+compat_features:
+  # ⬇️ Same status as overall feature ⬇️
+  # baseline: high
+  # baseline_low_date: 2015-07-29
+  # baseline_high_date: 2018-01-29
+  # support:
+  #   chrome: "1"
+  #   chrome_android: "18"
+  #   edge: "12"
+  #   firefox: "1"
+  #   firefox_android: "4"
+  #   safari: "3.1"
+  #   safari_ios: "2"
+  - css.selectors.lang
+
+  # baseline: false
+  # support:
+  #   firefox: "114"
+  #   firefox_android: "114"
+  #   safari: "9"
+  #   safari_ios: "9"
+  - css.selectors.lang.argument_list
+  - css.selectors.lang.wildcards

features/not.yml

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+name: :not
+description: The `:not()` functional pseudo-class matches elements that do not match the selectors in its argument.
+spec: https://drafts.csswg.org/selectors-4/#negation
+caniuse: css-not-sel-list
+group: selectors
+compat_features:
+  - css.selectors.not
+  - css.selectors.not.selector_list

features/not.yml.dist

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+# Generated from: not.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: high
+  baseline_low_date: 2021-01-21
+  baseline_high_date: 2023-07-21
+  support:
+    chrome: "88"
+    chrome_android: "88"
+    edge: "88"
+    firefox: "84"
+    firefox_android: "84"
+    safari: "9"
+    safari_ios: "9"
+compat_features:
+  # baseline: high
+  # baseline_low_date: 2015-07-29
+  # baseline_high_date: 2018-01-29
+  # support:
+  #   chrome: "1"
+  #   chrome_android: "18"
+  #   edge: "12"
+  #   firefox: "1"
+  #   firefox_android: "4"
+  #   safari: "3.1"
+  #   safari_ios: "2"
+  - css.selectors.not
+
+  # ⬇️ Same status as overall feature ⬇️
+  # baseline: high
+  # baseline_low_date: 2021-01-21
+  # baseline_high_date: 2023-07-21
+  # support:
+  #   chrome: "88"
+  #   chrome_android: "88"
+  #   edge: "88"
+  #   firefox: "84"
+  #   firefox_android: "84"
+  #   safari: "9"
+  #   safari_ios: "9"
+  - css.selectors.not.selector_list

features/root.yml

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+name: :root
+description: The `:root` pseudo-class matches the root element of the document, usually the `<html>` element.
+spec: https://drafts.csswg.org/selectors-4/#the-root-pseudo
+group: selectors
+compat_features:
+  - css.selectors.root

features/root.yml.dist

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+# Generated from: root.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: high
+  baseline_low_date: 2015-07-29
+  baseline_high_date: 2018-01-29
+  support:
+    chrome: "1"
+    chrome_android: "18"
+    edge: "12"
+    firefox: "1"
+    firefox_android: "4"
+    safari: "1"
+    safari_ios: "1"
+compat_features:
+  - css.selectors.root

features/target.yml

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+name: :target
+description: The `:target` CSS pseudo-class matches the element with an ID matching the URL fragment.
+spec: https://drafts.csswg.org/selectors-4/#the-target-pseudo
+group: selectors
+compat_features:
+  - css.selectors.target

features/target.yml.dist

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+# Generated from: target.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: high
+  baseline_low_date: 2015-07-29
+  baseline_high_date: 2018-01-29
+  support:
+    chrome: "1"
+    chrome_android: "18"
+    edge: "12"
+    firefox: "1"
+    firefox_android: "4"
+    safari: "1.3"
+    safari_ios: "2"
+compat_features:
+  - css.selectors.target

features/user-action-pseudos.yml

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+name: User action pseudo-classes
+description: The `:active`, `:focus`, and `:hover` CSS pseudo-classes match elements based on how users are interacting with them.
+spec:
+  - https://drafts.csswg.org/selectors-4/#the-hover-pseudo
+  - https://drafts.csswg.org/selectors-4/#the-active-pseudo
+  - https://drafts.csswg.org/selectors-4/#the-focus-pseudo
+group: selectors
+compat_features:
+  - css.selectors.active
+  - css.selectors.active.non_a_elements
+  - css.selectors.focus
+  - css.selectors.hover

features/user-action-pseudos.yml.dist

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+# Generated from: user-action-pseudos.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: high
+  baseline_low_date: 2015-07-29
+  baseline_high_date: 2018-01-29
+  support:
+    chrome: "1"
+    chrome_android: "18"
+    edge: "12"
+    firefox: "1"
+    firefox_android: "4"
+    safari: "2"
+    safari_ios: "1"
+compat_features:
+  # baseline: high
+  # baseline_low_date: 2015-07-29
+  # baseline_high_date: 2018-01-29
+  # support:
+  #   chrome: "1"
+  #   chrome_android: "18"
+  #   edge: "12"
+  #   firefox: "1"
+  #   firefox_android: "4"
+  #   safari: "1"
+  #   safari_ios: "1"
+  - css.selectors.active
+  - css.selectors.active.non_a_elements
+  - css.selectors.focus
+
+  # ⬇️ Same status as overall feature ⬇️
+  # baseline: high
+  # baseline_low_date: 2015-07-29
+  # baseline_high_date: 2018-01-29
+  # support:
+  #   chrome: "1"
+  #   chrome_android: "18"
+  #   edge: "12"
+  #   firefox: "1"
+  #   firefox_android: "4"
+  #   safari: "2"
+  #   safari_ios: "1"
+  - css.selectors.hover