From 3ed733f813188ce88389934afc9575717b62c974 Mon Sep 17 00:00:00 2001
From: 43081j <43081j@users.noreply.github.com>
Date: Mon, 2 Jan 2023 19:04:03 +0000
Subject: [PATCH 1/3] fix: consider ruleless declarations as standard

---
 .../isStandardSyntaxDeclaration.test.js       | 10 +++++++++
 lib/utils/isStandardSyntaxDeclaration.js      | 21 +------------------
 2 files changed, 11 insertions(+), 20 deletions(-)

diff --git a/lib/utils/__tests__/isStandardSyntaxDeclaration.test.js b/lib/utils/__tests__/isStandardSyntaxDeclaration.test.js
index fcce7bba53..5e145f0546 100644
--- a/lib/utils/__tests__/isStandardSyntaxDeclaration.test.js
+++ b/lib/utils/__tests__/isStandardSyntaxDeclaration.test.js
@@ -166,6 +166,16 @@ describe('isStandardSyntaxDeclaration', () => {
 			true,
 		);
 	});
+
+	it('supports root-level declarations', () => {
+		const doc = new postcss.Document();
+		const root = postcss.parse('color: yellow;');
+
+		root.parent = doc;
+		doc.nodes.push(root);
+
+		expect(isStandardSyntaxDeclaration(root.nodes[0])).toBe(true);
+	});
 });
 
 function decl(css, parser = postcss) {
diff --git a/lib/utils/isStandardSyntaxDeclaration.js b/lib/utils/isStandardSyntaxDeclaration.js
index 2f1f8b5787..e258a7d89f 100644
--- a/lib/utils/isStandardSyntaxDeclaration.js
+++ b/lib/utils/isStandardSyntaxDeclaration.js
@@ -1,14 +1,7 @@
 'use strict';
 
 const isScssVariable = require('./isScssVariable');
-const { isRoot, isRule } = require('./typeGuards');
-
-/**
- * @param {string} [lang]
- */
-function isStandardSyntaxLang(lang) {
-	return lang && (lang === 'css' || lang === 'custom-template' || lang === 'template-literal');
-}
+const { isRule } = require('./typeGuards');
 
 /**
  * Check whether a declaration is standard
@@ -19,18 +12,6 @@ module.exports = function isStandardSyntaxDeclaration(decl) {
 	const prop = decl.prop;
 	const parent = decl.parent;
 
-	// Declarations belong in a declaration block or standard CSS source
-	if (
-		parent &&
-		isRoot(parent) &&
-		parent.source &&
-		!isStandardSyntaxLang(
-			/** @type {import('postcss').Source & {lang?: string}} */ (parent.source).lang,
-		)
-	) {
-		return false;
-	}
-
 	// SCSS var; covers map and list declarations
 	if (isScssVariable(prop)) {
 		return false;

From 8323ba893bc1302512620c377e6b17c5e6a4dd5a Mon Sep 17 00:00:00 2001
From: Masafumi Koba <473530+ybiquitous@users.noreply.github.com>
Date: Thu, 5 Jan 2023 09:11:08 +0900
Subject: [PATCH 2/3] Add changelog entry

---
 .changeset/empty-goats-count.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/empty-goats-count.md

diff --git a/.changeset/empty-goats-count.md b/.changeset/empty-goats-count.md
new file mode 100644
index 0000000000..08cca0d360
--- /dev/null
+++ b/.changeset/empty-goats-count.md
@@ -0,0 +1,5 @@
+---
+"stylelint": patch
+---
+
+Fixed: `property-no-unknown` false negatives for newer custom syntaxes

From 54a5098129ffd3cbd7b2f55d9320935d65d94774 Mon Sep 17 00:00:00 2001
From: Masafumi Koba <473530+ybiquitous@users.noreply.github.com>
Date: Thu, 5 Jan 2023 18:34:30 +0900
Subject: [PATCH 3/3] Simplify test case

---
 lib/utils/__tests__/isStandardSyntaxDeclaration.test.js | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/lib/utils/__tests__/isStandardSyntaxDeclaration.test.js b/lib/utils/__tests__/isStandardSyntaxDeclaration.test.js
index 5e145f0546..8c928ee3aa 100644
--- a/lib/utils/__tests__/isStandardSyntaxDeclaration.test.js
+++ b/lib/utils/__tests__/isStandardSyntaxDeclaration.test.js
@@ -168,13 +168,7 @@ describe('isStandardSyntaxDeclaration', () => {
 	});
 
 	it('supports root-level declarations', () => {
-		const doc = new postcss.Document();
-		const root = postcss.parse('color: yellow;');
-
-		root.parent = doc;
-		doc.nodes.push(root);
-
-		expect(isStandardSyntaxDeclaration(root.nodes[0])).toBe(true);
+		expect(isStandardSyntaxDeclaration(decl('color: yellow;'))).toBe(true);
 	});
 });