From b1e2c8fd5cb5dfa46bc440a12eafaf56cd844b1c Mon Sep 17 00:00:00 2001
From: Philipp Tanlak <philipp.tanlak@gmail.com>
Date: Mon, 24 Nov 2025 20:54:57 +0100
Subject: Docs

---
 node_modules/tailwindcss/src/lib/detectNesting.js | 47 +++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 node_modules/tailwindcss/src/lib/detectNesting.js

(limited to 'node_modules/tailwindcss/src/lib/detectNesting.js')

diff --git a/node_modules/tailwindcss/src/lib/detectNesting.js b/node_modules/tailwindcss/src/lib/detectNesting.js
new file mode 100644
index 0000000..03252e2
--- /dev/null
+++ b/node_modules/tailwindcss/src/lib/detectNesting.js
@@ -0,0 +1,47 @@
+function isRoot(node) {
+  return node.type === 'root'
+}
+
+function isAtLayer(node) {
+  return node.type === 'atrule' && node.name === 'layer'
+}
+
+export default function (_context) {
+  return (root, result) => {
+    let found = false
+
+    root.walkAtRules('tailwind', (node) => {
+      if (found) return false
+
+      if (node.parent && !(isRoot(node.parent) || isAtLayer(node.parent))) {
+        found = true
+        node.warn(
+          result,
+          [
+            'Nested @tailwind rules were detected, but are not supported.',
+            "Consider using a prefix to scope Tailwind's classes: https://tailwindcss.com/docs/configuration#prefix",
+            'Alternatively, use the important selector strategy: https://tailwindcss.com/docs/configuration#selector-strategy',
+          ].join('\n')
+        )
+        return false
+      }
+    })
+
+    root.walkRules((rule) => {
+      if (found) return false
+
+      rule.walkRules((nestedRule) => {
+        found = true
+        nestedRule.warn(
+          result,
+          [
+            'Nested CSS was detected, but CSS nesting has not been configured correctly.',
+            'Please enable a CSS nesting plugin *before* Tailwind in your configuration.',
+            'See how here: https://tailwindcss.com/docs/using-with-preprocessors#nesting',
+          ].join('\n')
+        )
+        return false
+      })
+    })
+  }
+}
-- 
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