Fix function-no-unknown false positives (#8677)

Mouvedia · web-flow · commit 8f8b864f4c06 · 2025-07-24T13:29:38.000+02:00
diff --git a/.changeset/young-bananas-design.md b/.changeset/young-bananas-design.md
@@ -0,0 +1,5 @@
+---
+"stylelint": patch
+---
+
+Fixed: `function-no-unknown` false positives
diff --git a/lib/rules/function-no-unknown/__tests__/index.mjs b/lib/rules/function-no-unknown/__tests__/index.mjs
@@ -52,6 +52,15 @@ testRule({
 			code: 'a { animation-timing-function: linear(0, 0.25, 1); }',
 			description: 'explicit linear check',
 		},
+		{
+			code: 'h1 { string-set: Chapter content(); }',
+		},
+		{
+			code: '@top-right { content: string(Chapter); }',
+		},
+		{
+			code: 'a { --color: if(media(width >= 1px): red; else: green); }',
+		},
 	],
 
 	reject: [
diff --git a/lib/rules/function-no-unknown/index.cjs b/lib/rules/function-no-unknown/index.cjs
diff --git a/lib/rules/function-no-unknown/index.mjs b/lib/rules/function-no-unknown/index.mjs
@@ -16,8 +16,18 @@ import validateOptions from '../../utils/validateOptions.mjs';
 const require = createRequire(import.meta.url);
 const functionsList = require('css-functions-list/index.json');
 
-/** @todo submit PR to css-functions-list */
-const FUNCTIONS = [...functionsList, 'running'];
+const FUNCTIONS = [
+	...functionsList,
+	// https://drafts.csswg.org/css-values-5/#if-notation
+	'if',
+	'media',
+	'style',
+	'supports',
+	// niksy/css-functions-list#10
+	'content',
+	'running',
+	'string',
+];
 
 const ruleName = 'function-no-unknown';
 

-Original file line number
+Diff line change
@@ @@ -0,0 +1,5 @@ @@
 +---
 +"stylelint": patch
 +---
++
 +Fixed: `function-no-unknown` false positives