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node_modules/stylelint/lib/rules/selector-combinator-space-after/README.md

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+# selector-combinator-space-after
+
+Require a single space or disallow whitespace after the combinators of selectors.
+
+```css
+  a > b + c ~ d e { color: pink; }
+/** ↑   ↑   ↑  ↑
+ * These are combinators */
+```
+
+Combinators are used to combine several different selectors into new and more specific ones. There are several types of combinators, including: child (`>`), adjacent sibling (`+`), general sibling (`~`), and descendant (which is represented by a blank space between two selectors).
+
+The descendant combinator is *not* checked by this rule.
+
+Also, `+` and `-` signs within `:nth-*()` arguments are not checked (e.g. `a:nth-child(2n+1)`).
+
+## Options
+
+`string`: `"always"|"never"`
+
+### `"always"`
+
+There *must always* be a single space after the combinators.
+
+The following patterns are considered warnings:
+
+```css
+a +b { color: pink; }
+```
+
+```css
+a>b { color: pink; }
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+a + b { color: pink; }
+```
+
+```css
+a> b { color: pink; }
+```
+
+### `"never"`
+
+There *must never* be whitespace after the combinators.
+
+The following patterns are considered warnings:
+
+```css
+a + b { color: pink; }
+```
+
+```css
+a> b { color: pink; }
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+a +b { color: pink; }
+```
+
+```css
+a>b { color: pink; }
+```

node_modules/stylelint/lib/rules/selector-combinator-space-after/index.js

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+"use strict"
+
+const ruleMessages = require("../../utils/ruleMessages")
+const validateOptions = require("../../utils/validateOptions")
+const whitespaceChecker = require("../../utils/whitespaceChecker")
+const selectorCombinatorSpaceChecker = require("../selectorCombinatorSpaceChecker")
+
+const ruleName = "selector-combinator-space-after"
+
+const messages = ruleMessages(ruleName, {
+  expectedAfter: combinator => `Expected single space after "${combinator}"`,
+  rejectedAfter: combinator => `Unexpected whitespace after "${combinator}"`,
+})
+
+const rule = function (expectation) {
+  const checker = whitespaceChecker("space", expectation, messages)
+  return (root, result) => {
+    const validOptions = validateOptions(result, ruleName, {
+      actual: expectation,
+      possible: [
+        "always",
+        "never",
+      ],
+    })
+    if (!validOptions) {
+      return
+    }
+
+    selectorCombinatorSpaceChecker({
+      root,
+      result,
+      locationChecker: checker.after,
+      checkedRuleName: ruleName,
+    })
+  }
+}
+
+rule.ruleName = ruleName
+rule.messages = messages
+module.exports = rule