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node_modules/stylelint/lib/rules/custom-property-pattern/README.md

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+# custom-property-pattern
+
+Specify a pattern for custom properties.
+
+<!-- prettier-ignore -->
+```css
+a { --foo-: 1px; }
+/**   ↑
+ * The pattern of this */
+```
+
+## Options
+
+`regex|string`
+
+A string will be translated into a RegExp like so `new RegExp(yourString)` — so be sure to escape properly.
+
+Given the string:
+
+```
+"foo-.+"
+```
+
+The following patterns are considered violations:
+
+<!-- prettier-ignore -->
+```css
+:root { --boo-bar: 0; }
+```
+
+The following patterns are _not_ considered violations:
+
+<!-- prettier-ignore -->
+```css
+:root { --foo-bar: 0; }
+```

node_modules/stylelint/lib/rules/custom-property-pattern/index.js

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+// @ts-nocheck
+
+'use strict';
+
+const _ = require('lodash');
+const isCustomProperty = require('../../utils/isCustomProperty');
+const report = require('../../utils/report');
+const ruleMessages = require('../../utils/ruleMessages');
+const validateOptions = require('../../utils/validateOptions');
+
+const ruleName = 'custom-property-pattern';
+
+const messages = ruleMessages(ruleName, {
+	expected: (pattern) => `Expected custom property name to match pattern "${pattern}"`,
+});
+
+function rule(pattern) {
+	return (root, result) => {
+		const validOptions = validateOptions(result, ruleName, {
+			actual: pattern,
+			possible: [_.isRegExp, _.isString],
+		});
+
+		if (!validOptions) {
+			return;
+		}
+
+		const regexpPattern = _.isString(pattern) ? new RegExp(pattern) : pattern;
+
+		root.walkDecls((decl) => {
+			const prop = decl.prop;
+
+			if (!isCustomProperty(prop)) {
+				return;
+			}
+
+			if (regexpPattern.test(prop.slice(2))) {
+				return;
+			}
+
+			report({
+				message: messages.expected(pattern),
+				node: decl,
+				result,
+				ruleName,
+			});
+		});
+	};
+}
+
+rule.ruleName = ruleName;
+rule.messages = messages;
+module.exports = rule;