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node_modules/stylelint/lib/rules/block-opening-brace-newline-after/README.md

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+# block-opening-brace-newline-after
+
+Require a newline after the opening brace of blocks.
+
+```css
+  a {
+    ↑ color: pink; }
+/** ↑
+ * The newline after this brace */
+```
+
+This rule allows an end-of-line comment followed by a newline. For example,
+
+```css
+a { /* end-of-line comment */
+  color: pink;
+}
+```
+
+Refer to [the FAQ](../../../docs/user-guide/faq.md#how-do-i-disallow-single-line-blocks) for more information on using this rule with [`block-opening-brace-newline-before`](../block-opening-brace-newline-before/README.md) to disallow single-line rules.
+
+## Options
+
+`string`: `"always"|"always-multi-line"|"never-multi-line"`
+
+### `"always"`
+
+There *must always* be a newline after the opening brace.
+
+The following patterns are considered warnings:
+
+```css
+a{ color: pink; }
+```
+
+```css
+a{ color: pink;
+}
+```
+
+```css
+a{ /* end-of-line comment
+  with a newline */
+  color: pink;
+}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+a {
+color: pink; }
+```
+
+```css
+a
+{
+color: pink; }
+```
+
+```css
+a { /* end-of-line comment */
+  color: pink;
+}
+```
+
+### `"always-multi-line"`
+
+There *must always* be a newline after the opening brace in multi-line blocks.
+
+The following patterns are considered warnings:
+
+```css
+a{color: pink;
+}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+a { color: pink; }
+```
+
+```css
+a {
+color: pink; }
+```
+
+### `"never-multi-line"`
+
+There *must never* be whitespace after the opening brace in multi-line blocks.
+
+The following patterns are considered warnings:
+
+```css
+a { color: pink;
+}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+a { color: pink; }
+```
+
+```css
+a {color: pink;
+}
+```

node_modules/stylelint/lib/rules/block-opening-brace-newline-after/index.js

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+"use strict"
+
+const beforeBlockString = require("../../utils/beforeBlockString")
+const blockString = require("../../utils/blockString")
+const hasBlock = require("../../utils/hasBlock")
+const hasEmptyBlock = require("../../utils/hasEmptyBlock")
+const nextNonCommentNode = require("../../utils/nextNonCommentNode")
+const rawNodeString = require("../../utils/rawNodeString")
+const report = require("../../utils/report")
+const ruleMessages = require("../../utils/ruleMessages")
+const validateOptions = require("../../utils/validateOptions")
+const whitespaceChecker = require("../../utils/whitespaceChecker")
+
+const ruleName = "block-opening-brace-newline-after"
+
+const messages = ruleMessages(ruleName, {
+  expectedAfter: () => "Expected newline after \"{\"",
+  expectedAfterMultiLine: () => "Expected newline after \"{\" of a multi-line block",
+  rejectedAfterMultiLine: () => "Unexpected whitespace after \"{\" of a multi-line block",
+})
+
+const rule = function (expectation) {
+  const checker = whitespaceChecker("newline", expectation, messages)
+
+  return (root, result) => {
+    const validOptions = validateOptions(result, ruleName, {
+      actual: expectation,
+      possible: [
+        "always",
+        "always-multi-line",
+        "never-multi-line",
+      ],
+    })
+    if (!validOptions) {
+      return
+    }
+
+    // Check both kinds of statement: rules and at-rules
+    root.walkRules(check)
+    root.walkAtRules(check)
+
+    function check(statement) {
+      // Return early if blockless or has an empty block
+      if (
+        !hasBlock(statement)
+        || hasEmptyBlock(statement)
+      ) {
+        return
+      }
+
+      // Allow an end-of-line comment
+      const nodeToCheck = nextNonCommentNode(statement.first)
+      if (!nodeToCheck) {
+        return
+      }
+
+      checker.afterOneOnly({
+        source: rawNodeString(nodeToCheck),
+        index: -1,
+        lineCheckStr: blockString(statement),
+        err: m => {
+          report({
+            message: m,
+            node: statement,
+            index: beforeBlockString(statement, { noRawBefore: true }).length + 1,
+            result,
+            ruleName,
+          })
+        },
+      })
+    }
+  }
+}
+
+rule.ruleName = ruleName
+rule.messages = messages
+module.exports = rule