Fix `declaration-property-value-no-unknown` false negatives/positives for math functions by romainmenke · Pull Request #9064 · stylelint/stylelint

romainmenke · 2026-02-11T15:52:51Z

Which issue, if any, is this issue related to?

closes: Fix declaration-property-value-no-unknown false negatives for math functions inside non-math functions #9052
closes: Fix declaration-property-value-no-unknown reported ranges for multiple math functions #9053
closes: Fix declaration-property-value-no-unknown false positives for calc() with mixed operations #9066

Is there anything in the PR that needs further explanation?

This is a pretty extensive rewrite of the changes introduced in: #9011

The intention of the rewrite is not to change behavior but to fix the two mentioned bugs and also to reduce the amount of times we tokenize/parse values.

…functions

changeset-bot · 2026-02-11T15:52:59Z

🦋 Changeset detected

Latest commit: 8434197

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
stylelint	Minor

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Click here if you're a maintainer who wants to add another changeset to this PR

…ersistent-emperor-tamarin-9df3ed4648

github-actions · 2026-02-11T15:57:28Z

This PR is packaged and the instant preview is available (8434197). View the demo website.

Install it locally:

npm i -D https://pkg.pr.new/stylelint@8434197

jeddy3

@romainmenke Thanks for working on this. It's looking great!

Is it intentionally marked as a draft?

I've added a second changeset.

I suggest we first merge:

#9067

Then resolve the conflicts here and merge this PR next, before looking at:

#9066

romainmenke · 2026-02-12T15:11:37Z

Is it intentionally marked as a draft?

Yes, I wanted to work on coverage and add comments in the PR to better explain some choices

I've added a second changeset.

Thank you 🙇
I always forget how to do this (2 files vs. 2 lines)

I suggest we first merge

Perfect!

I am going to take a look at updating @csstools/css-calc first because that will allow us to remove a lot of code here. Code that will then not need reviewing :)

…mperor-tamarin-9df3ed4648' of https://github.com/stylelint/stylelint into fix-declaration-property-value-no-unknown--persistent-emperor-tamarin-9df3ed4648

…rty-value-no-unknown--persistent-emperor-tamarin-9df3ed4648

romainmenke · 2026-02-12T17:02:27Z

-			message: messages.rejectedMath('height', 'calc(2 * 2)'),
+			message: messages.rejectedMath('height', '2 * 2'),


The reported range is narrower for operations like +, -, /, ... but not for functions like min() or clamp().

Any result has source indices that trace back to the expression.

for math functions this is the function itself

for operations these are the outermost operands

romainmenke · 2026-02-12T17:05:14Z

+			code: 'a { margin-inline: calc(3px - 1px) calc(3 - 1px); }',
+			message: messages.rejectedMath('margin-inline', '3 - 1px'),


Test that the last calc() function is reported and not the first.

romainmenke · 2026-02-12T17:06:37Z

+			code: 'a { margin-inline: calc((3px + 2px) - (1)); }',
+			message: messages.rejectedMath('margin-inline', '3px + 2px) - (1'),


These are newly reported errors.
@csstools/css-calc will recursively find all issues, and it will also handle expressions wrapped in parenthesis.

romainmenke · 2026-02-12T17:08:22Z

+		{
+			code: 'a { top: calc(0.3 * 100% + 10px); }',
+			description: 'mixed units and percentages checking respects operator precedence',
+		},
+		{
+			code: 'a { top: calc(0.3 * 100vh + 15px); }',
+			description: 'mixed units and percentages checking respects operator precedence',
+		},


romainmenke · 2026-02-12T17:11:21Z

 const SYNTAX_DESCRIPTOR = /^syntax$/i;

-const UNSUPPORTED_FUNCTIONS = new Set(['env']);
+const UNSUPPORTED_FUNCTIONS_IN_CSSTREE = new Set(['clamp', 'min', 'max', 'env']);


We still need the list that previously existed here.

I've renamed it to make it clearer why we consider these unsupported. @csstools/css-calc for example does support these.

romainmenke · 2026-02-12T17:11:36Z

+			// TODO: csstree treats any value containing `var()` as valid, even if the `var()` expression itself is invalid.
+			// csstree should be updated to mark invalidate values that contain invalid `var()` expressions.
+			// skipping parsing by returning early until this is resolved upstream.
+			if (/\bvar\s*\(/i.test(value)) return;


Moved this check up to speedup this rule.

romainmenke · 2026-02-12T17:15:35Z

 * @param {ReturnType<import('css-tree')['fork']>['lexer']} lexer - The csstree lexer
 * @param {Map<string, string>} typedCustomPropertyNames - Map of typed custom property names
- * @returns {'skip' | 'invalid' | 'continue'} - The validation result
+ * @returns {['undetermined' | 'valid' | 'invalid' | 'skip-validation', number, number]} - The validation result


I found skip and continue to be ambiguous and I think this naming also caused an oversight in the original implementation.

I've refactored it to cover these states:

valid: the value is fine and no further checking is needed

invalid: already found an issue, report and stop

skip-validation: something was detected that we can't validate, and neither can the rest of this rule, stop

undetermined: we don't know, run the regular validation after this step

romainmenke · 2026-02-12T17:16:28Z

+		switch (calcParseError.message) {
+			case ParseErrorMessage.UnexpectedAdditionOfDimensionOrPercentageWithNumber:
+			case ParseErrorMessage.UnexpectedSubtractionOfDimensionOrPercentageWithNumber:
+				return ['invalid', calcParseError.sourceStart, calcParseError.sourceEnd + 1];
+
+			default:
+				break;
+		}


Only handling very specific errors here.
This allows updates in @csstools/css-calc without causing new errors to be reported downstream in Stylelint.

romainmenke · 2026-02-12T17:17:42Z

+			const startOffset = error.loc.start.offset;
+			const endOffset = error.loc.end.offset;
+
+			// Lookup the original source position of the invalid expression
+			// by finding the tokens that correspond to the positions reported by csstree
+			const solvedTokens = solvedNodes.flatMap((componentValues) =>
+				componentValues.flatMap((node) => node.tokens()),
+			);
+			let counter = 0;
+			let startToken;
+			let endToken;


This allows us to trace the error:
css-tree report -> @csstools tokens -> original source

romainmenke · 2026-02-12T17:34:47Z

+		{
+			code: 'a { margin-inline: calc(10px)calc(20px); }',
+			skip: true,
+			description: 'functions can be written without separating white space',
+		},


This is converted to 10px20px which is a dimension with value 10 and unit px20px.

This is quite obscure, but something that we should fix.
I am running out of time today and given that no one writes such source code it seems fine for now.

Need to find a way to inject some whitespace between such values.

Does it make sense to leave a comment for this skip so that others can understand? E.g.

skip: true, // TODO: ...

It does make sense to add such a comment :)

Going to do quick follow up PR to remove the skip instead.

jeddy3

A fantastic effort upstream and here in this PR!

LGTM, thank you.

ybiquitous

LGTM, thank you 👍🏼

My minor comment is ignorable.

romainmenke · 2026-02-13T07:00:54Z

Thank you for the reviews 🙇

@jeddy3

| datasource | package | from | to | | ---------- | --------- | ------ | ------ | | npm | stylelint | 17.1.0 | 17.3.0 | ## [v17.3.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1730---2026-02-13) It fixes 17 bugs. 3 related to supporting `calc()` in `declaration-property-value-no-unknown`, and 13 performance ones that make Stylelint a further 3x faster when using the rules in our [standard config](https://www.npmjs.com/package/stylelint-config-standard). - Fixed: performance of rule sequencing ([#9055](stylelint/stylelint#9055)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `*-list` performance ([#9056](stylelint/stylelint#9056)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `*-notation` performance ([#9044](stylelint/stylelint#9044)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-max-values` performance ([#9057](stylelint/stylelint#9057)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-value-keyword-no-deprecated` performance ([#9058](stylelint/stylelint#9058)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-value-no-unknown` false negatives for math functions inside of non-math functions ([#9064](stylelint/stylelint#9064)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `declaration-property-value-no-unknown` false positives for `calc()` with mixed operations ([#9064](stylelint/stylelint#9064)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `declaration-property-value-no-unknown` performance ([#9062](stylelint/stylelint#9062)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-value-no-unknown` reported ranges for multiple math functions ([#9064](stylelint/stylelint#9064)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `length-zero-no-unit` performance ([#9046](stylelint/stylelint#9046)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `named-grid-areas-no-invalid` false positives for mix of tabs and spaces ([#9039](stylelint/stylelint#9039)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: `no-unknown-custom-media` performance ([#9059](stylelint/stylelint#9059)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `selector-max-*` performance ([#9042](stylelint/stylelint#9042)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `shorthand-property-no-redundant-values` performance ([#9047](stylelint/stylelint#9047)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `syntax-string-no-invalid` performance ([#9061](stylelint/stylelint#9061)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `time-min-milliseconds` performance ([#9060](stylelint/stylelint#9060)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `value-keyword-case` performance ([#9048](stylelint/stylelint#9048)) ([@jeddy3](https://github.com/jeddy3)). ## [v17.2.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1720---2026-02-10) It fixes 7 bugs, including 5 performance ones that make Stylelint 7x faster and use 3x less memory on larger codebases such as design systems and monorepos. We also restructured our docs to create a [contributor guide](CONTRIBUTING.md). If you'd like to help out and contribute to Stylelint, that's the place to start. - Fixed: performance of config augmentation and module imports ([#9021](stylelint/stylelint#9021)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: performance of config override matching ([#9023](stylelint/stylelint#9023)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: performance of config resolution ([#9033](stylelint/stylelint#9033)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: performance of rule resolution ([#9022](stylelint/stylelint#9022)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: `declaration-property-value-no-unknown` false negatives for math functions ([#9011](stylelint/stylelint#9011)) ([@ragini-pandey](https://github.com/ragini-pandey)). - Fixed: `no-duplicate-selectors` false negatives for matching escaped selectors ([#8953](stylelint/stylelint#8953)) ([@bjnewman](https://github.com/bjnewman)). - Fixed: `no-invalid-position-at-import-rule` false negatives for layers with blocks ([#9026](stylelint/stylelint#9026)) ([@romainmenke](https://github.com/romainmenke)). ## [v17.1.1](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1711---2026-02-03) It fixes 2 bugs. - Fixed: resolution of configs, plugins, processors, and custom syntaxes in Yarn PnP environments ([#9010](stylelint/stylelint#9010)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: `lightness-notation` autofix for decimals ([#9009](stylelint/stylelint#9009)) ([@IlyaSemenov](https://github.com/IlyaSemenov)).

@jeddy3

| datasource | package | from | to | | ---------- | --------- | ------ | ------ | | npm | stylelint | 17.1.0 | 17.3.0 | ## [v17.3.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1730---2026-02-13) It fixes 17 bugs. 3 related to supporting `calc()` in `declaration-property-value-no-unknown`, and 13 performance ones that make Stylelint a further 3x faster when using the rules in our [standard config](https://www.npmjs.com/package/stylelint-config-standard). - Fixed: performance of rule sequencing ([#9055](stylelint/stylelint#9055)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `*-list` performance ([#9056](stylelint/stylelint#9056)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `*-notation` performance ([#9044](stylelint/stylelint#9044)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-max-values` performance ([#9057](stylelint/stylelint#9057)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-value-keyword-no-deprecated` performance ([#9058](stylelint/stylelint#9058)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-value-no-unknown` false negatives for math functions inside of non-math functions ([#9064](stylelint/stylelint#9064)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `declaration-property-value-no-unknown` false positives for `calc()` with mixed operations ([#9064](stylelint/stylelint#9064)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `declaration-property-value-no-unknown` performance ([#9062](stylelint/stylelint#9062)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-value-no-unknown` reported ranges for multiple math functions ([#9064](stylelint/stylelint#9064)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `length-zero-no-unit` performance ([#9046](stylelint/stylelint#9046)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `named-grid-areas-no-invalid` false positives for mix of tabs and spaces ([#9039](stylelint/stylelint#9039)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: `no-unknown-custom-media` performance ([#9059](stylelint/stylelint#9059)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `selector-max-*` performance ([#9042](stylelint/stylelint#9042)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `shorthand-property-no-redundant-values` performance ([#9047](stylelint/stylelint#9047)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `syntax-string-no-invalid` performance ([#9061](stylelint/stylelint#9061)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `time-min-milliseconds` performance ([#9060](stylelint/stylelint#9060)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `value-keyword-case` performance ([#9048](stylelint/stylelint#9048)) ([@jeddy3](https://github.com/jeddy3)). ## [v17.2.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1720---2026-02-10) It fixes 7 bugs, including 5 performance ones that make Stylelint 7x faster and use 3x less memory on larger codebases such as design systems and monorepos. We also restructured our docs to create a [contributor guide](CONTRIBUTING.md). If you'd like to help out and contribute to Stylelint, that's the place to start. - Fixed: performance of config augmentation and module imports ([#9021](stylelint/stylelint#9021)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: performance of config override matching ([#9023](stylelint/stylelint#9023)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: performance of config resolution ([#9033](stylelint/stylelint#9033)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: performance of rule resolution ([#9022](stylelint/stylelint#9022)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: `declaration-property-value-no-unknown` false negatives for math functions ([#9011](stylelint/stylelint#9011)) ([@ragini-pandey](https://github.com/ragini-pandey)). - Fixed: `no-duplicate-selectors` false negatives for matching escaped selectors ([#8953](stylelint/stylelint#8953)) ([@bjnewman](https://github.com/bjnewman)). - Fixed: `no-invalid-position-at-import-rule` false negatives for layers with blocks ([#9026](stylelint/stylelint#9026)) ([@romainmenke](https://github.com/romainmenke)). ## [v17.1.1](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1711---2026-02-03) It fixes 2 bugs. - Fixed: resolution of configs, plugins, processors, and custom syntaxes in Yarn PnP environments ([#9010](stylelint/stylelint#9010)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: `lightness-notation` autofix for decimals ([#9009](stylelint/stylelint#9009)) ([@IlyaSemenov](https://github.com/IlyaSemenov)).

@jeddy3

| datasource | package | from | to | | ---------- | --------- | ------ | ------ | | npm | stylelint | 17.1.0 | 17.3.0 | ## [v17.3.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1730---2026-02-13) It fixes 17 bugs. 3 related to supporting `calc()` in `declaration-property-value-no-unknown`, and 13 performance ones that make Stylelint a further 3x faster when using the rules in our [standard config](https://www.npmjs.com/package/stylelint-config-standard). - Fixed: performance of rule sequencing ([#9055](stylelint/stylelint#9055)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `*-list` performance ([#9056](stylelint/stylelint#9056)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `*-notation` performance ([#9044](stylelint/stylelint#9044)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-max-values` performance ([#9057](stylelint/stylelint#9057)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-value-keyword-no-deprecated` performance ([#9058](stylelint/stylelint#9058)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-value-no-unknown` false negatives for math functions inside of non-math functions ([#9064](stylelint/stylelint#9064)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `declaration-property-value-no-unknown` false positives for `calc()` with mixed operations ([#9064](stylelint/stylelint#9064)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `declaration-property-value-no-unknown` performance ([#9062](stylelint/stylelint#9062)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-value-no-unknown` reported ranges for multiple math functions ([#9064](stylelint/stylelint#9064)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `length-zero-no-unit` performance ([#9046](stylelint/stylelint#9046)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `named-grid-areas-no-invalid` false positives for mix of tabs and spaces ([#9039](stylelint/stylelint#9039)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: `no-unknown-custom-media` performance ([#9059](stylelint/stylelint#9059)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `selector-max-*` performance ([#9042](stylelint/stylelint#9042)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `shorthand-property-no-redundant-values` performance ([#9047](stylelint/stylelint#9047)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `syntax-string-no-invalid` performance ([#9061](stylelint/stylelint#9061)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `time-min-milliseconds` performance ([#9060](stylelint/stylelint#9060)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `value-keyword-case` performance ([#9048](stylelint/stylelint#9048)) ([@jeddy3](https://github.com/jeddy3)). ## [v17.2.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1720---2026-02-10) It fixes 7 bugs, including 5 performance ones that make Stylelint 7x faster and use 3x less memory on larger codebases such as design systems and monorepos. We also restructured our docs to create a [contributor guide](CONTRIBUTING.md). If you'd like to help out and contribute to Stylelint, that's the place to start. - Fixed: performance of config augmentation and module imports ([#9021](stylelint/stylelint#9021)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: performance of config override matching ([#9023](stylelint/stylelint#9023)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: performance of config resolution ([#9033](stylelint/stylelint#9033)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: performance of rule resolution ([#9022](stylelint/stylelint#9022)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: `declaration-property-value-no-unknown` false negatives for math functions ([#9011](stylelint/stylelint#9011)) ([@ragini-pandey](https://github.com/ragini-pandey)). - Fixed: `no-duplicate-selectors` false negatives for matching escaped selectors ([#8953](stylelint/stylelint#8953)) ([@bjnewman](https://github.com/bjnewman)). - Fixed: `no-invalid-position-at-import-rule` false negatives for layers with blocks ([#9026](stylelint/stylelint#9026)) ([@romainmenke](https://github.com/romainmenke)). ## [v17.1.1](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1711---2026-02-03) It fixes 2 bugs. - Fixed: resolution of configs, plugins, processors, and custom syntaxes in Yarn PnP environments ([#9010](stylelint/stylelint#9010)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: `lightness-notation` autofix for decimals ([#9009](stylelint/stylelint#9009)) ([@IlyaSemenov](https://github.com/IlyaSemenov)).

This PR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [eslint](https://eslint.org) ([source](https://github.com/eslint/eslint)) | devDependencies | patch | [`9.39.2` -> `9.39.3`](https://renovatebot.com/diffs/npm/eslint/9.39.2/9.39.3) | | [prettier](https://prettier.io) ([source](https://github.com/prettier/prettier)) | devDependencies | patch | [`3.8.0` -> `3.8.1`](https://renovatebot.com/diffs/npm/prettier/3.8.0/3.8.1) | | [stylelint](https://stylelint.io) ([source](https://github.com/stylelint/stylelint)) | devDependencies | minor | [`17.0.0` -> `17.4.0`](https://renovatebot.com/diffs/npm/stylelint/17.0.0/17.4.0) | --- ### Release Notes <details> <summary>eslint/eslint (eslint)</summary> ### [`v9.39.3`](https://github.com/eslint/eslint/releases/tag/v9.39.3) [Compare Source](eslint/eslint@v9.39.2...v9.39.3) #### Bug Fixes - [`791bf8d`](eslint/eslint@791bf8d) fix: restore TypeScript 4.0 compatibility in types ([#20504](eslint/eslint#20504)) (sethamus) #### Chores - [`8594a43`](eslint/eslint@8594a43) chore: upgrade [@eslint/js](https://github.com/eslint/js)@9.39.3 ([#20529](eslint/eslint#20529)) (Milos Djermanovic) - [`9ceef92`](eslint/eslint@9ceef92) chore: package.json update for [@eslint/js](https://github.com/eslint/js) release (Jenkins) - [`af498c6`](eslint/eslint@af498c6) chore: ignore `/docs/v9.x` in link checker ([#20453](eslint/eslint#20453)) (Milos Djermanovic) </details> <details> <summary>prettier/prettier (prettier)</summary> ### [`v3.8.1`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#381) [Compare Source](prettier/prettier@3.8.0...3.8.1) [diff](prettier/prettier@3.8.0...3.8.1) ##### Include available `printers` in plugin type declarations ([#18706](prettier/prettier#18706) by [@porada](https://github.com/porada))  ```ts // Input import * as prettierPluginEstree from "prettier/plugins/estree"; // Prettier 3.8.0 // Property 'printers' does not exist on type 'typeof import("prettier/plugins/estree")'. ts(2339) prettierPluginEstree.printers.estree; //=> any // Prettier 3.8.1 prettierPluginEstree.printers.estree; //=> Printer prettierPluginEstree.printers["estree-json"]; //=> Printer ``` </details> <details> <summary>stylelint/stylelint (stylelint)</summary> ### [`v17.4.0`](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1740---2026-02-25) [Compare Source](stylelint/stylelint@17.3.0...17.4.0) It adds 2 options to the rules and fixes 7 bugs. - Added: `ignoreAtRules: []` to `at-rule-no-vendor-prefix` ([#9096](stylelint/stylelint#9096)) ([@theacrat](https://github.com/theacrat)). - Added: `ignoreMediaFeatureNames: []` to `media-feature-name-no-vendor-prefix` ([#9097](stylelint/stylelint#9097)) ([@theacrat](https://github.com/theacrat)). - Fixed: performance of selector cloning rules ([#9089](stylelint/stylelint#9089)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `*-empty-line-before` performance ([#9092](stylelint/stylelint#9092)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-value-no-unknown` performance ([#9090](stylelint/stylelint#9090)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `no-irregular-whitespace` performance ([#9091](stylelint/stylelint#9091)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `property-no-unknown` false negatives for at-rule descriptors ([#9109](stylelint/stylelint#9109)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `property-no-unknown` false positives for `corner-shape` ([#9099](stylelint/stylelint#9099)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `property-no-unknown` false positives for double-slashed properties ([#9099](stylelint/stylelint#9099)) ([@jeddy3](https://github.com/jeddy3)). ### [`v17.3.0`](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1730---2026-02-13) [Compare Source](stylelint/stylelint@17.2.0...17.3.0) It fixes 17 bugs. 3 related to supporting `calc()` in `declaration-property-value-no-unknown`, and 13 performance ones that make Stylelint a further 3x faster when using the rules in our [standard config](https://www.npmjs.com/package/stylelint-config-standard). - Fixed: performance of rule sequencing ([#9055](stylelint/stylelint#9055)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `*-list` performance ([#9056](stylelint/stylelint#9056)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `*-notation` performance ([#9044](stylelint/stylelint#9044)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-max-values` performance ([#9057](stylelint/stylelint#9057)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-value-keyword-no-deprecated` performance ([#9058](stylelint/stylelint#9058)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-value-no-unknown` false negatives for math functions inside of non-math functions ([#9064](stylelint/stylelint#9064)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `declaration-property-value-no-unknown` false positives for `calc()` with mixed operations ([#9064](stylelint/stylelint#9064)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `declaration-property-value-no-unknown` performance ([#9062](stylelint/stylelint#9062)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `declaration-property-value-no-unknown` reported ranges for multiple math functions ([#9064](stylelint/stylelint#9064)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `length-zero-no-unit` performance ([#9046](stylelint/stylelint#9046)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `named-grid-areas-no-invalid` false positives for mix of tabs and spaces ([#9039](stylelint/stylelint#9039)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: `no-unknown-custom-media` performance ([#9059](stylelint/stylelint#9059)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `selector-max-*` performance ([#9042](stylelint/stylelint#9042)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `shorthand-property-no-redundant-values` performance ([#9047](stylelint/stylelint#9047)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `syntax-string-no-invalid` performance ([#9061](stylelint/stylelint#9061)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `time-min-milliseconds` performance ([#9060](stylelint/stylelint#9060)) ([@jeddy3](https://github.com/jeddy3)). - Fixed: `value-keyword-case` performance ([#9048](stylelint/stylelint#9048)) ([@jeddy3](https://github.com/jeddy3)). ### [`v17.2.0`](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1720---2026-02-10) [Compare Source](stylelint/stylelint@17.1.1...17.2.0) It fixes 7 bugs, including 5 performance ones that make Stylelint 7x faster and use 3x less memory on larger codebases such as design systems and monorepos. We also restructured our docs to create a [contributor guide](CONTRIBUTING.md). If you'd like to help out and contribute to Stylelint, that's the place to start. - Fixed: performance of config augmentation and module imports ([#9021](stylelint/stylelint#9021)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: performance of config override matching ([#9023](stylelint/stylelint#9023)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: performance of config resolution ([#9033](stylelint/stylelint#9033)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: performance of rule resolution ([#9022](stylelint/stylelint#9022)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: `declaration-property-value-no-unknown` false negatives for math functions ([#9011](stylelint/stylelint#9011)) ([@ragini-pandey](https://github.com/ragini-pandey)). - Fixed: `no-duplicate-selectors` false negatives for matching escaped selectors ([#8953](stylelint/stylelint#8953)) ([@bjnewman](https://github.com/bjnewman)). - Fixed: `no-invalid-position-at-import-rule` false negatives for layers with blocks ([#9026](stylelint/stylelint#9026)) ([@romainmenke](https://github.com/romainmenke)). ### [`v17.1.1`](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1711---2026-02-03) [Compare Source](stylelint/stylelint@17.1.0...17.1.1) It fixes 2 bugs. - Fixed: resolution of configs, plugins, processors, and custom syntaxes in Yarn PnP environments ([#9010](stylelint/stylelint#9010)) ([@adalinesimonian](https://github.com/adalinesimonian)). - Fixed: `lightness-notation` autofix for decimals ([#9009](stylelint/stylelint#9009)) ([@IlyaSemenov](https://github.com/IlyaSemenov)). ### [`v17.1.0`](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1710---2026-01-30) [Compare Source](stylelint/stylelint@17.0.0...17.1.0) It fixes 5 bugs and adds the `display-notation` rule. Before we turn it on in our [standard config](https://www.npmjs.com/package/stylelint-config-standard), we'd like to [hear the community's thoughts](stylelint/stylelint-config-standard#387) on which options to use. - Added: `display-notation` rule ([#8981](stylelint/stylelint#8981)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `GlobbyOptions` TypeScript errors ([#8992](stylelint/stylelint#8992)) ([@zalishchuk](https://github.com/zalishchuk)). - Fixed: `hue-degree-notation` false negatives and positives for relative colors ([#8985](stylelint/stylelint#8985)) ([@jamesnw](https://github.com/jamesnw)). - Fixed: `lightness-notation` false negatives for relative colors ([#8987](stylelint/stylelint#8987)) ([@jamesnw](https://github.com/jamesnw)). - Fixed: `selector-type-no-unknown` false positives for `geolocation` and `usermedia` ([#9004](stylelint/stylelint#9004)) ([@Mouvedia](https://github.com/Mouvedia)). - Fixed: `selector-type-no-unknown` false positives for `rb`, `rtc` and `menuitem` ([#8972](stylelint/stylelint#8972)) ([@Mouvedia](https://github.com/Mouvedia)). </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 👻 **Immortal**: This PR will be recreated if closed unmerged. Get [config help](https://github.com/renovatebot/renovate/discussions) if that's undesired. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).  Reviewed-on: https://git.robbevp.be/robbevp/website-robbevanpetegem/pulls/505 Co-authored-by: Renovate Bot <renovate@robbevp.be> Co-committed-by: Renovate Bot <renovate@robbevp.be>

Fix declaration-property-value-no-unknown false negatives for math …

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romainmenke added 2 commits February 11, 2026 16:54

Merge branch 'main' into fix-declaration-property-value-no-unknown--p…

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Fix declaration-property-value-no-unknown false positives for calc() with mixed operations #9068

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romainmenke added 5 commits February 12, 2026 17:46

use upstream parse error

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…mperor-tamarin-9df3ed4648' of https://github.com/stylelint/stylelint into fix-declaration-property-value-no-unknown--persistent-emperor-tamarin-9df3ed4648

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Release 17.3.0 #9075

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ybiquitous changed the title ~~Fix declaration-property-value-no-unknown false negatives for math functions~~ Fix declaration-property-value-no-unknown false negatives/positives for math functions Feb 13, 2026

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romainmenke merged commit 239297d into main Feb 13, 2026
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romainmenke deleted the fix-declaration-property-value-no-unknown--persistent-emperor-tamarin-9df3ed4648 branch February 13, 2026 07:01

		message: messages.rejectedMath('height', 'calc(2 * 2)'),
		message: messages.rejectedMath('height', '2 * 2'),

		code: 'a { margin-inline: calc(3px - 1px) calc(3 - 1px); }',
		message: messages.rejectedMath('margin-inline', '3 - 1px'),

		code: 'a { margin-inline: calc((3px + 2px) - (1)); }',
		message: messages.rejectedMath('margin-inline', '3px + 2px) - (1'),

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