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node_modules/stylelint/lib/rules/block-no-empty/README.md

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+# block-no-empty
+
+Disallow empty blocks.
+
+```css
+ a { }
+/** ↑
+ * Blocks like this */
+```
+
+## Options
+
+### `true`
+
+The following patterns are considered warnings:
+
+```css
+a {}
+```
+
+```css
+a { }
+```
+
+```css
+@media print { a {} }
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+a { color: pink; }
+```
+
+```css
+@media print { a { color: pink; } }
+```

node_modules/stylelint/lib/rules/block-no-empty/index.js

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+"use strict"
+
+const beforeBlockString = require("../../utils/beforeBlockString")
+const hasEmptyBlock = require("../../utils/hasEmptyBlock")
+const report = require("../../utils/report")
+const ruleMessages = require("../../utils/ruleMessages")
+const validateOptions = require("../../utils/validateOptions")
+
+const ruleName = "block-no-empty"
+
+const messages = ruleMessages(ruleName, {
+  rejected: "Unexpected empty block",
+})
+
+const rule = function (actual) {
+  return (root, result) => {
+    const validOptions = validateOptions(result, ruleName, { actual })
+    if (!validOptions) {
+      return
+    }
+
+    // Check both kinds of statements: rules and at-rules
+    root.walkRules(check)
+    root.walkAtRules(check)
+
+    function check(statement) {
+      if (!hasEmptyBlock(statement)) {
+        return
+      }
+
+      let index = beforeBlockString(statement, { noRawBefore: true }).length
+
+      // For empty blocks when using SugarSS parser
+      if (statement.raws.between === undefined) {
+        index--
+      }
+
+      report({
+        message: messages.rejected,
+        node: statement,
+        index,
+        result,
+        ruleName,
+      })
+    }
+  }
+}
+
+rule.ruleName = ruleName
+rule.messages = messages
+module.exports = rule