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node_modules/stylelint/lib/rules/selector-root-no-composition/README.md

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+# selector-root-no-composition
+
+***Deprecated: See [CHANGELOG](../../../CHANGELOG.md).***
+
+Disallow the composition of `:root` in selectors.
+
+```css
+    a, :root {}
+/** ↑  ↑
+ * This type of composite selector */
+```
+
+## Options
+
+### `true`
+
+The following patterns are considered warnings:
+
+```css
+a, :root {}
+```
+
+```css
+:root + a {}
+```
+
+```css
+html:root {}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+:root {}
+```

node_modules/stylelint/lib/rules/selector-root-no-composition/index.js

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+"use strict"
+
+const report = require("../../utils/report")
+const ruleMessages = require("../../utils/ruleMessages")
+const validateOptions = require("../../utils/validateOptions")
+
+const ruleName = "selector-root-no-composition"
+
+const messages = ruleMessages(ruleName, {
+  rejected: "Unexpected composition",
+})
+
+const rule = function (actual) {
+  return (root, result) => {
+    const validOptions = validateOptions(result, ruleName, { actual })
+    if (!validOptions) {
+      return
+    }
+
+    result.warn((
+      `'${ruleName}' has been deprecated and in 8.0 will be removed.`
+    ), {
+      stylelintType: "deprecation",
+      stylelintReference: `https://stylelint.io/user-guide/rules/${ruleName}/`,
+    })
+
+    root.walkRules(rule => {
+      if (rule.selector.toLowerCase().indexOf(":root") === -1 || rule.selector.toLowerCase().trim() === ":root") {
+        return
+      }
+
+      report({
+        message: messages.rejected,
+        node: rule,
+        result,
+        ruleName,
+      })
+    })
+  }
+}
+
+rule.ruleName = ruleName
+rule.messages = messages
+module.exports = rule