1 files changed, 42 insertions, 0 deletions
diff --git a/node_modules/doiuse/data/features/css-sel2.js b/node_modules/doiuse/data/features/css-sel2.js
new file mode 100644
index 00000000..cdadf2ff
--- /dev/null
+++ b/node_modules/doiuse/data/features/css-sel2.js
@@ -0,0 +1,42 @@
+import { checkSelector } from '../../utils/util.js';
+
+const ATTRIBUTE_IDENTIFIER = '[^\\~|^$*\\]]*';
+
+// Export for testing
+export const REGEXES = {
+  'HAS_ATTRIBUTE': new RegExp(`\\[${ATTRIBUTE_IDENTIFIER}\\]`),
+  'MATCH_ATTRIBUTE': new RegExp(`\\[${ATTRIBUTE_IDENTIFIER}=${ATTRIBUTE_IDENTIFIER}\\]`),
+  'WORD_ATTRIBUTE': new RegExp(`\\[${ATTRIBUTE_IDENTIFIER}\\~=${ATTRIBUTE_IDENTIFIER}\\]`),
+  'SUBCODE_ATTRIBUTE': new RegExp(`\\[${ATTRIBUTE_IDENTIFIER}\\|=${ATTRIBUTE_IDENTIFIER}\\]`),
+  'BRACKET_PARENS': /(\[[^=\]]*(=("[^"]*")|[^\]]+|)])|(\([^)]*\))/g,
+};
+
+/**
+ * @param {RegExp} pattern
+ * @return {(str:string) => boolean}
+ */
+function matchOutsideOfBrackets(pattern) {
+  if (!(pattern instanceof RegExp)) {
+    throw new TypeError('matchOutsideOfBrackets expects a RegExp');
+  }
+  return (string) => pattern.test(string.replaceAll(REGEXES.BRACKET_PARENS, ''));
+}
+
+export default checkSelector([
+  ':first-child',
+  ':link',
+  ':visited',
+  ':active',
+  ':hover',
+  ':focus',
+  ':lang',
+  REGEXES.HAS_ATTRIBUTE,
+  REGEXES.MATCH_ATTRIBUTE,
+  REGEXES.WORD_ATTRIBUTE,
+  REGEXES.SUBCODE_ATTRIBUTE,
+  matchOutsideOfBrackets(/\*/),
+  matchOutsideOfBrackets(/>/),
+  matchOutsideOfBrackets(/\+/),
+  matchOutsideOfBrackets(/\./),
+  matchOutsideOfBrackets(/#/),
+]);