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node_modules/stylelint/lib/rules/media-feature-name-no-unknown/README.md

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+# media-feature-name-no-unknown
+
+Disallow unknown media feature names.
+
+```css
+@media (min-width: 700px) {}
+/**     ↑
+ * These media feature names */
+```
+
+This rule considers media feature names defined in the CSS Specifications, up to and including Editor's Drafts, to be known.
+
+All vendor-prefixed media feature names are ignored.
+
+Caveat: Media feature names within a [range context](https://www.w3.org/TR/mediaqueries-4/#mq-ranges) are currently ignored.
+
+## Options
+
+### `true`
+
+The following patterns are considered warnings:
+
+```css
+@media screen and (unknown) {}
+```
+
+```css
+@media screen and (unknown: 10px) {}
+```
+
+The following patterns are *not* considered warnings:
+
+```css  
+@media all and (monochrome) {}
+```
+
+```css  
+@media (min-width: 700px) {}
+```
+
+```css
+@media (MIN-WIDTH: 700px) {}
+```
+
+```css
+@media (min-width: 700px) and (orientation: landscape) {}
+```
+
+```css
+@media (-webkit-min-device-pixel-ratio: 2) {}
+```
+
+## Optional secondary options
+
+### `ignoreMediaFeatureNames: ["/regex/", "string"]`
+
+Given:
+
+```js
+["/^my-/", "custom"]
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+@media screen and (my-media-feature-name) {}
+```
+
+```css
+@media screen and (MY-MEDIA-FEATURE-NAME) {}
+```
+
+```css
+@media screen and (custom: 10px) {}
+```
+
+```css
+@media (min-width: 700px) and (custom: 10px) {}
+```

node_modules/stylelint/lib/rules/media-feature-name-no-unknown/index.js

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+"use strict"
+
+const atRuleParamIndex = require("../../utils/atRuleParamIndex")
+const isCustomMediaQuery = require("../../utils/isCustomMediaQuery")
+const isRangeContextMediaFeature = require("../../utils/isRangeContextMediaFeature")
+const isStandardSyntaxMediaFeatureName = require("../../utils/isStandardSyntaxMediaFeatureName")
+const optionsMatches = require("../../utils/optionsMatches")
+const report = require("../../utils/report")
+const ruleMessages = require("../../utils/ruleMessages")
+const validateOptions = require("../../utils/validateOptions")
+const _ = require("lodash")
+const keywordSets = require("../../reference/keywordSets")
+const mediaParser = require("postcss-media-query-parser").default
+const postcss = require("postcss")
+
+const ruleName = "media-feature-name-no-unknown"
+
+const messages = ruleMessages(ruleName, {
+  rejected: mediaFeatureName => `Unexpected unknown media feature name "${mediaFeatureName}"`,
+})
+
+const rule = function (actual, options) {
+  return (root, result) => {
+    const validOptions = validateOptions(result, ruleName, { actual }, {
+      actual: options,
+      possible: {
+        ignoreMediaFeatureNames: [_.isString],
+      },
+      optional: true,
+    })
+
+    if (!validOptions) {
+      return
+    }
+
+    root.walkAtRules(/^media$/i, atRule => {
+      mediaParser(atRule.params).walk(/^media-feature$/i, mediaFeatureNode => {
+        const parent = mediaFeatureNode.parent,
+          sourceIndex = mediaFeatureNode.sourceIndex,
+          value = mediaFeatureNode.value
+
+        if (isRangeContextMediaFeature(parent.value) || !isStandardSyntaxMediaFeatureName(value) || isCustomMediaQuery(value)) {
+          return
+        }
+
+        if (optionsMatches(options, "ignoreMediaFeatureNames", value)) {
+          return
+        }
+
+        if (postcss.vendor.prefix(value) || keywordSets.mediaFeatureNames.has(value.toLowerCase())) {
+          return
+        }
+
+        report({
+          index: atRuleParamIndex(atRule) + sourceIndex,
+          message: messages.rejected(value),
+          node: atRule,
+          ruleName,
+          result,
+        })
+      })
+    })
+  }
+}
+
+rule.ruleName = ruleName
+rule.messages = messages
+module.exports = rule