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node_modules/stylelint/lib/rules/root-no-standard-properties/README.md

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+# root-no-standard-properties
+
+***Deprecated: See [CHANGELOG](../../../CHANGELOG.md).***
+
+Disallow standard properties inside `:root` rules.
+
+```css
+    :root { color: #333 }
+/** ↑       ↑
+ * This selector and these types of standard properties */
+```
+
+This rule ignores `$sass` and `@less` variables.
+
+## Options
+
+### `true`
+
+The following patterns are considered warnings:
+
+```css
+:root { color: pink; }
+```
+
+```css
+a, :root { top: 0; }
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+:root { --foo: 0; }
+```
+
+```css
+a, :root { --foo: 0; }
+```

node_modules/stylelint/lib/rules/root-no-standard-properties/index.js

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+"use strict"
+
+const isCustomProperty = require("../../utils/isCustomProperty")
+const isStandardSyntaxProperty = require("../../utils/isStandardSyntaxProperty")
+const parseSelector = require("../../utils/parseSelector")
+const report = require("../../utils/report")
+const ruleMessages = require("../../utils/ruleMessages")
+const validateOptions = require("../../utils/validateOptions")
+
+const ruleName = "root-no-standard-properties"
+
+const messages = ruleMessages(ruleName, {
+  rejected: property => `Unexpected standard property "${property}"`,
+})
+
+const rule = function (actual) {
+  return (root, result) => {
+    const validOptions = validateOptions(result, ruleName, { actual })
+    if (!validOptions) {
+      return
+    }
+
+    result.warn((
+      `'${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) {
+        return
+      }
+      parseSelector(rule.selector, result, rule, checkSelector)
+
+      function checkSelector(selectorAST) {
+        if (ignoreRule(selectorAST)) {
+          return
+        }
+
+        rule.each(function (node) {
+          if (node.type !== "decl") {
+            return
+          }
+
+          const prop = node.prop
+
+          if (!isStandardSyntaxProperty(prop)) {
+            return
+          }
+          if (isCustomProperty(prop)) {
+            return
+          }
+
+          report({
+            message: messages.rejected(prop),
+            node,
+            result,
+            ruleName,
+          })
+        })
+      }
+    })
+  }
+}
+
+function ignoreRule(selectorAST) {
+  let ignore = false
+  selectorAST.walk(selectorNode => {
+    // ignore `:root` selector inside a `:not()` selector
+    if (selectorNode.value && selectorNode.value.toLowerCase() === ":root" && selectorNode.parent.parent.value && selectorNode.parent.parent.value.toLowerCase() === ":not") {
+      ignore = true
+    }
+  })
+  return ignore
+}
+
+rule.ruleName = ruleName
+rule.messages = messages
+module.exports = rule