Fix `declaration-block-no-duplicate-properties` false negatives for named colors with `ignore: ['consecutive-duplicates-with-different-syntaxes']` #8665

sw1tch3roo · 2025-07-10T09:50:58Z

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

Is there anything in the PR that needs further explanation?

This PR fixes a false negative where duplicate named colors were not being flagged when using ignore: ['consecutive-duplicates-with-different-syntaxes'].

The Problem:

p {
    color: red;
    color: blue;
}

Previously, this would not trigger a warning with ignore: ['consecutive-duplicates-with-different-syntaxes'] because the rule incorrectly treated red and blue as having different syntaxes.

The Solution:

Added logic to treat named colors (red, blue, green, etc.) as having the same syntax
Named colors now correctly trigger warnings even with the ignore option
This matches the existing behavior for other color formats like rgb() and hex colors
Added comprehensive tests covering various named color scenarios

Changes:

Updated isEqualValueNodes function to identify when both values are named colors
Added test cases for named color duplicates
Fixed import sorting to follow ESLint rules

The fix ensures consistency with how other color formats are handled and prevents unintentional duplicate declarations.

changeset-bot · 2025-07-10T09:51:03Z

🦋 Changeset detected

Latest commit: 874bed3

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

This PR includes changesets to release 1 package

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…cate detection; added comprehensive tests for named color scenarios

github-actions · 2025-07-10T20:39:44Z

This PR is packaged and the instant preview is available (874bed3). View the demo website.

Install it locally:

npm i -D https://pkg.pr.new/stylelint@874bed3

lib/rules/declaration-block-no-duplicate-properties/__tests__/index.mjs

Mouvedia · 2025-07-10T20:55:25Z

Hello @sw1tch3roo,

Thanks for your first contribution.

Check my comment above.

You should also filter out the properties using our singleValueColorProperties set + some exceptions—e.g. border-color.
i.e.

p {
	animation-name: red;
	animation-name: black;
}

…es only, preventing false negatives for properties like scrollbar-color, border-color, and animation-name

…olors' into fix-duplicate-properties-named-colors

sw1tch3roo · 2025-07-10T22:34:12Z

Thank u for the review @Mouvedia!!

I've implemented the fix by restricting named color equivalence to only properties in the singleValueColorProperties set.

All the test cases you mentioned now pass correctly =)

Mouvedia · 2025-07-13T22:30:38Z

If the goal of the PR is to only target color properties then you have to restrict it to

the properties which may only have one value (which we have an existing set for)
and the ones that accept multiples values (i.e. scrollbar-color and border-color)

a {
	border-color: red yellow;
	border-color: green;
}

won't produce an error in the demo; is it by design?

Ignore consecutive duplicated properties with different value syntaxes (type and unit of value).

Is the number of values considered a different "type"?
Is it the expected behaviour?

sw1tch3roo · 2025-07-14T11:20:41Z

Honestly, I was a bit confused by all the edge cases at first, but after going through everything again I think we got it right now =D

After that confusion earlier, I kept the named color logic but refined it to only apply to actual color properties and respect that different value counts = different syntaxes. So

a {
    border-color: red yellow;
    border-color: green;
}

correctly doesn't error since they have different structures

Mouvedia · 2025-07-14T19:40:09Z

…correctly doesn't error since they have different structures

As I asked before, is that the expected behaviour?

ref
#6632 (comment)
#6796 (comment)

In particular

distinct keywords indicate different syntaxes

seems to indicate that it should error out?
I don't know really. @romainmenke since you are the one who requested the option, can you tell us what should be expected? If it's not obvious, we will have to change the option's description in the rule's README.

sw1tch3roo · 2025-07-14T21:12:30Z

Is it the expected behaviour?

@Mouvedia yep, this is expected behavior

Is the number of values considered a different "type"?

I think so.

So this case has different structures:

a {
    border-color: red yellow;
    border-color: green;
}

So we treat them as different syntaxes - no error with the ignore option. Our named color logic only kicks in when values have the same structure (like color: red; color: blue;).

We're being smarter about it - instead of just comparing keywords, we look at the whole value syntax. This catches real duplicates while allowing legitimate fallback patterns, which is what @romainmenke wanted

sw1tch3roo · 2025-07-16T15:41:40Z

@Mouvedia @romainmenke guys, what do you think about the above?

jeddy3

Thank you for your efforts working through the edge cases of this pull request.

I've made one minor request. Otherwise, it LGTM.

lib/rules/declaration-block-no-duplicate-properties/index.mjs

jeddy3

LGTM, thank you.

ybiquitous

LGTM, thanks 👍

@sw1tch3roo

| datasource | package | from | to | | ---------- | --------- | ------- | ------- | | npm | stylelint | 16.20.0 | 16.23.0 | ## [v16.23.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16230---2025-07-29) It adds 5 new rules, 1 option to a rule and fixes 3 bugs. We've turned on the new rules in our [standard config](https://www.npmjs.com/package/stylelint-config-standard). - Added: `block-no-redundant-nested-style-rules` rule ([#8684](stylelint/stylelint#8684)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Added: `media-type-no-deprecated` rule ([#8668](stylelint/stylelint#8668)) ([@immitsu](https://github.com/immitsu)). - Added: `nesting-selector-no-missing-scoping-root` rule ([#8674](stylelint/stylelint#8674)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Added: `no-invalid-position-declaration` rule ([#8669](stylelint/stylelint#8669)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Added: `property-no-deprecated` rule ([#8682](stylelint/stylelint#8682)) ([@immitsu](https://github.com/immitsu)). - Added: `except: ["exact-value"]` to `media-feature-range-notation` ([#8675](stylelint/stylelint#8675)) ([@immitsu](https://github.com/immitsu)). - Fixed: `declaration-block-no-duplicate-properties` false negatives for named colors with `ignore: ['consecutive-duplicates-with-different-syntaxes']` ([#8665](stylelint/stylelint#8665)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Fixed: `function-no-unknown` false positives ([#8677](stylelint/stylelint#8677)) ([@Mouvedia](https://github.com/Mouvedia)). - Fixed: `no-irregular-whitespace` false positives for strings ([#8667](stylelint/stylelint#8667)) ([@immitsu](https://github.com/immitsu)). ## [v16.22.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16220---2025-07-18) It adds 3 rule features and fixes 2 bugs. - Added: `messageArgs` to `color-named` ([#8663](stylelint/stylelint#8663)) ([@Mouvedia](https://github.com/Mouvedia)). - Added: `messageArgs` to `declaration-property-value-keyword-no-deprecated` ([#8654](stylelint/stylelint#8654)) ([@Mouvedia](https://github.com/Mouvedia)). - Added: `no-descending-specificity` report message includes line number of the anchoring selector ([#8666](stylelint/stylelint#8666)) ([@immitsu](https://github.com/immitsu)). - Fixed: `at-rule-no-deprecated` false positives for `@apply` ([#8630](stylelint/stylelint#8630)) ([@Mouvedia](https://github.com/Mouvedia)). - Fixed: `lightness-notation` crash with `"number"` option and single-digit percentage ([#8661](stylelint/stylelint#8661)) ([@ybiquitous](https://github.com/ybiquitous)). ## [v16.21.1](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16211---2025-07-03) It fixes 3 bugs. - Fixed: unexpected change of syntax in computed `EditInfo` ([#8638](stylelint/stylelint#8638)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `function-linear-gradient-no-nonstandard-direction` false positives for CSS variables' names containing a direction substring ([#8643](stylelint/stylelint#8643)) ([@Solomon-mithra](https://github.com/Solomon-mithra)). - Fixed: `media-feature-range-notation` autofix for exact values ([#8651](stylelint/stylelint#8651)) ([@romainmenke](https://github.com/romainmenke)). ## [v16.21.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16210---2025-06-19) It rounds out the `message` secondary option and marks it as stable, adds 1 new option to a rule, and fixes 4 bugs. - Added: non-experimental support for functional `message` secondary option ([#8595](stylelint/stylelint#8595)) ([@ybiquitous](https://github.com/ybiquitous)). - Added: `ignore: ["after-custom-property"]` to `custom-property-empty-line-before` ([#8627](stylelint/stylelint#8627)) ([@imkesin](https://github.com/imkesin)). - Fixed: `cache` configuration property not being respected ([#8599](stylelint/stylelint#8599)) ([@ybiquitous](https://github.com/ybiquitous)). - Fixed: `fastest-levenshtein` import when bundling ([#8621](stylelint/stylelint#8621)) ([@onigoetz](https://github.com/onigoetz)). - Fixed: `named-grid-areas-no-invalid` false positives for interpolated grid-template-areas in CSS-in-JS ([#8606](stylelint/stylelint#8606)) ([@shahana308](https://github.com/shahana308)). - Fixed: `selector-pseudo-*-no-unknown` false positives for the missing form control styling selectors ([#8623](stylelint/stylelint#8623)) ([@tyrann0us](https://github.com/tyrann0us)).

@sw1tch3roo

| datasource | package | from | to | | ---------- | --------- | ------- | ------- | | npm | stylelint | 16.20.0 | 16.23.0 | ## [v16.23.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16230---2025-07-29) It adds 5 new rules, 1 option to a rule and fixes 3 bugs. We've turned on the new rules in our [standard config](https://www.npmjs.com/package/stylelint-config-standard). - Added: `block-no-redundant-nested-style-rules` rule ([#8684](stylelint/stylelint#8684)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Added: `media-type-no-deprecated` rule ([#8668](stylelint/stylelint#8668)) ([@immitsu](https://github.com/immitsu)). - Added: `nesting-selector-no-missing-scoping-root` rule ([#8674](stylelint/stylelint#8674)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Added: `no-invalid-position-declaration` rule ([#8669](stylelint/stylelint#8669)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Added: `property-no-deprecated` rule ([#8682](stylelint/stylelint#8682)) ([@immitsu](https://github.com/immitsu)). - Added: `except: ["exact-value"]` to `media-feature-range-notation` ([#8675](stylelint/stylelint#8675)) ([@immitsu](https://github.com/immitsu)). - Fixed: `declaration-block-no-duplicate-properties` false negatives for named colors with `ignore: ['consecutive-duplicates-with-different-syntaxes']` ([#8665](stylelint/stylelint#8665)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Fixed: `function-no-unknown` false positives ([#8677](stylelint/stylelint#8677)) ([@Mouvedia](https://github.com/Mouvedia)). - Fixed: `no-irregular-whitespace` false positives for strings ([#8667](stylelint/stylelint#8667)) ([@immitsu](https://github.com/immitsu)). ## [v16.22.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16220---2025-07-18) It adds 3 rule features and fixes 2 bugs. - Added: `messageArgs` to `color-named` ([#8663](stylelint/stylelint#8663)) ([@Mouvedia](https://github.com/Mouvedia)). - Added: `messageArgs` to `declaration-property-value-keyword-no-deprecated` ([#8654](stylelint/stylelint#8654)) ([@Mouvedia](https://github.com/Mouvedia)). - Added: `no-descending-specificity` report message includes line number of the anchoring selector ([#8666](stylelint/stylelint#8666)) ([@immitsu](https://github.com/immitsu)). - Fixed: `at-rule-no-deprecated` false positives for `@apply` ([#8630](stylelint/stylelint#8630)) ([@Mouvedia](https://github.com/Mouvedia)). - Fixed: `lightness-notation` crash with `"number"` option and single-digit percentage ([#8661](stylelint/stylelint#8661)) ([@ybiquitous](https://github.com/ybiquitous)). ## [v16.21.1](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16211---2025-07-03) It fixes 3 bugs. - Fixed: unexpected change of syntax in computed `EditInfo` ([#8638](stylelint/stylelint#8638)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `function-linear-gradient-no-nonstandard-direction` false positives for CSS variables' names containing a direction substring ([#8643](stylelint/stylelint#8643)) ([@Solomon-mithra](https://github.com/Solomon-mithra)). - Fixed: `media-feature-range-notation` autofix for exact values ([#8651](stylelint/stylelint#8651)) ([@romainmenke](https://github.com/romainmenke)). ## [v16.21.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16210---2025-06-19) It rounds out the `message` secondary option and marks it as stable, adds 1 new option to a rule, and fixes 4 bugs. - Added: non-experimental support for functional `message` secondary option ([#8595](stylelint/stylelint#8595)) ([@ybiquitous](https://github.com/ybiquitous)). - Added: `ignore: ["after-custom-property"]` to `custom-property-empty-line-before` ([#8627](stylelint/stylelint#8627)) ([@imkesin](https://github.com/imkesin)). - Fixed: `cache` configuration property not being respected ([#8599](stylelint/stylelint#8599)) ([@ybiquitous](https://github.com/ybiquitous)). - Fixed: `fastest-levenshtein` import when bundling ([#8621](stylelint/stylelint#8621)) ([@onigoetz](https://github.com/onigoetz)). - Fixed: `named-grid-areas-no-invalid` false positives for interpolated grid-template-areas in CSS-in-JS ([#8606](stylelint/stylelint#8606)) ([@shahana308](https://github.com/shahana308)). - Fixed: `selector-pseudo-*-no-unknown` false positives for the missing form control styling selectors ([#8623](stylelint/stylelint#8623)) ([@tyrann0us](https://github.com/tyrann0us)).

@sw1tch3roo

| datasource | package | from | to | | ---------- | --------- | ------- | ------- | | npm | stylelint | 16.20.0 | 16.23.0 | ## [v16.23.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16230---2025-07-29) It adds 5 new rules, 1 option to a rule and fixes 3 bugs. We've turned on the new rules in our [standard config](https://www.npmjs.com/package/stylelint-config-standard). - Added: `block-no-redundant-nested-style-rules` rule ([#8684](stylelint/stylelint#8684)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Added: `media-type-no-deprecated` rule ([#8668](stylelint/stylelint#8668)) ([@immitsu](https://github.com/immitsu)). - Added: `nesting-selector-no-missing-scoping-root` rule ([#8674](stylelint/stylelint#8674)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Added: `no-invalid-position-declaration` rule ([#8669](stylelint/stylelint#8669)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Added: `property-no-deprecated` rule ([#8682](stylelint/stylelint#8682)) ([@immitsu](https://github.com/immitsu)). - Added: `except: ["exact-value"]` to `media-feature-range-notation` ([#8675](stylelint/stylelint#8675)) ([@immitsu](https://github.com/immitsu)). - Fixed: `declaration-block-no-duplicate-properties` false negatives for named colors with `ignore: ['consecutive-duplicates-with-different-syntaxes']` ([#8665](stylelint/stylelint#8665)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Fixed: `function-no-unknown` false positives ([#8677](stylelint/stylelint#8677)) ([@Mouvedia](https://github.com/Mouvedia)). - Fixed: `no-irregular-whitespace` false positives for strings ([#8667](stylelint/stylelint#8667)) ([@immitsu](https://github.com/immitsu)). ## [v16.22.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16220---2025-07-18) It adds 3 rule features and fixes 2 bugs. - Added: `messageArgs` to `color-named` ([#8663](stylelint/stylelint#8663)) ([@Mouvedia](https://github.com/Mouvedia)). - Added: `messageArgs` to `declaration-property-value-keyword-no-deprecated` ([#8654](stylelint/stylelint#8654)) ([@Mouvedia](https://github.com/Mouvedia)). - Added: `no-descending-specificity` report message includes line number of the anchoring selector ([#8666](stylelint/stylelint#8666)) ([@immitsu](https://github.com/immitsu)). - Fixed: `at-rule-no-deprecated` false positives for `@apply` ([#8630](stylelint/stylelint#8630)) ([@Mouvedia](https://github.com/Mouvedia)). - Fixed: `lightness-notation` crash with `"number"` option and single-digit percentage ([#8661](stylelint/stylelint#8661)) ([@ybiquitous](https://github.com/ybiquitous)). ## [v16.21.1](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16211---2025-07-03) It fixes 3 bugs. - Fixed: unexpected change of syntax in computed `EditInfo` ([#8638](stylelint/stylelint#8638)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `function-linear-gradient-no-nonstandard-direction` false positives for CSS variables' names containing a direction substring ([#8643](stylelint/stylelint#8643)) ([@Solomon-mithra](https://github.com/Solomon-mithra)). - Fixed: `media-feature-range-notation` autofix for exact values ([#8651](stylelint/stylelint#8651)) ([@romainmenke](https://github.com/romainmenke)). ## [v16.21.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16210---2025-06-19) It rounds out the `message` secondary option and marks it as stable, adds 1 new option to a rule, and fixes 4 bugs. - Added: non-experimental support for functional `message` secondary option ([#8595](stylelint/stylelint#8595)) ([@ybiquitous](https://github.com/ybiquitous)). - Added: `ignore: ["after-custom-property"]` to `custom-property-empty-line-before` ([#8627](stylelint/stylelint#8627)) ([@imkesin](https://github.com/imkesin)). - Fixed: `cache` configuration property not being respected ([#8599](stylelint/stylelint#8599)) ([@ybiquitous](https://github.com/ybiquitous)). - Fixed: `fastest-levenshtein` import when bundling ([#8621](stylelint/stylelint#8621)) ([@onigoetz](https://github.com/onigoetz)). - Fixed: `named-grid-areas-no-invalid` false positives for interpolated grid-template-areas in CSS-in-JS ([#8606](stylelint/stylelint#8606)) ([@shahana308](https://github.com/shahana308)). - Fixed: `selector-pseudo-*-no-unknown` false positives for the missing form control styling selectors ([#8623](stylelint/stylelint#8623)) ([@tyrann0us](https://github.com/tyrann0us)).

@sw1tch3roo

| datasource | package | from | to | | ---------- | --------- | ------- | ------- | | npm | stylelint | 16.20.0 | 16.23.1 | ## [v16.23.1](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16231---2025-08-07) It fixes 7 bugs. - Fixed: `no-invalid-position-declaration` false positives for embedded styles ([#8701](stylelint/stylelint#8701)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Fixed: `property-no-deprecated` erroneously autofixing `clip` ([#8699](stylelint/stylelint#8699)) ([@immitsu](https://github.com/immitsu)). - Fixed: `property-no-deprecated` false positives for `-webkit-box-orient: vertical;` ([#8699](stylelint/stylelint#8699)) ([@immitsu](https://github.com/immitsu)). - Fixed: `selector-pseudo-*-no-unknown` false positives for some meter pseudo classes/elements ([#8708](stylelint/stylelint#8708)) ([@Mouvedia](https://github.com/Mouvedia)). - Fixed: `selector-pseudo-class-no-unknown` false positives for `:unchecked` ([#8705](stylelint/stylelint#8705)) ([@Mouvedia](https://github.com/Mouvedia)). - Fixed: `selector-pseudo-element-no-unknown` false positives for `::search-text` ([#8707](stylelint/stylelint#8707)) ([@Mouvedia](https://github.com/Mouvedia)). - Fixed: `selector-type-no-unknown` false positives for `selectedcontent` ([#8716](stylelint/stylelint#8716)) ([@Mouvedia](https://github.com/Mouvedia)). ## [v16.23.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16230---2025-07-29) It adds 5 new rules, 1 option to a rule and fixes 3 bugs. We've turned on the new rules in our [standard config](https://www.npmjs.com/package/stylelint-config-standard). - Added: `block-no-redundant-nested-style-rules` rule ([#8684](stylelint/stylelint#8684)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Added: `media-type-no-deprecated` rule ([#8668](stylelint/stylelint#8668)) ([@immitsu](https://github.com/immitsu)). - Added: `nesting-selector-no-missing-scoping-root` rule ([#8674](stylelint/stylelint#8674)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Added: `no-invalid-position-declaration` rule ([#8669](stylelint/stylelint#8669)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Added: `property-no-deprecated` rule ([#8682](stylelint/stylelint#8682)) ([@immitsu](https://github.com/immitsu)). - Added: `except: ["exact-value"]` to `media-feature-range-notation` ([#8675](stylelint/stylelint#8675)) ([@immitsu](https://github.com/immitsu)). - Fixed: `declaration-block-no-duplicate-properties` false negatives for named colors with `ignore: ['consecutive-duplicates-with-different-syntaxes']` ([#8665](stylelint/stylelint#8665)) ([@sw1tch3roo](https://github.com/sw1tch3roo)). - Fixed: `function-no-unknown` false positives ([#8677](stylelint/stylelint#8677)) ([@Mouvedia](https://github.com/Mouvedia)). - Fixed: `no-irregular-whitespace` false positives for strings ([#8667](stylelint/stylelint#8667)) ([@immitsu](https://github.com/immitsu)). ## [v16.22.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16220---2025-07-18) It adds 3 rule features and fixes 2 bugs. - Added: `messageArgs` to `color-named` ([#8663](stylelint/stylelint#8663)) ([@Mouvedia](https://github.com/Mouvedia)). - Added: `messageArgs` to `declaration-property-value-keyword-no-deprecated` ([#8654](stylelint/stylelint#8654)) ([@Mouvedia](https://github.com/Mouvedia)). - Added: `no-descending-specificity` report message includes line number of the anchoring selector ([#8666](stylelint/stylelint#8666)) ([@immitsu](https://github.com/immitsu)). - Fixed: `at-rule-no-deprecated` false positives for `@apply` ([#8630](stylelint/stylelint#8630)) ([@Mouvedia](https://github.com/Mouvedia)). - Fixed: `lightness-notation` crash with `"number"` option and single-digit percentage ([#8661](stylelint/stylelint#8661)) ([@ybiquitous](https://github.com/ybiquitous)). ## [v16.21.1](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16211---2025-07-03) It fixes 3 bugs. - Fixed: unexpected change of syntax in computed `EditInfo` ([#8638](stylelint/stylelint#8638)) ([@romainmenke](https://github.com/romainmenke)). - Fixed: `function-linear-gradient-no-nonstandard-direction` false positives for CSS variables' names containing a direction substring ([#8643](stylelint/stylelint#8643)) ([@Solomon-mithra](https://github.com/Solomon-mithra)). - Fixed: `media-feature-range-notation` autofix for exact values ([#8651](stylelint/stylelint#8651)) ([@romainmenke](https://github.com/romainmenke)). ## [v16.21.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16210---2025-06-19) It rounds out the `message` secondary option and marks it as stable, adds 1 new option to a rule, and fixes 4 bugs. - Added: non-experimental support for functional `message` secondary option ([#8595](stylelint/stylelint#8595)) ([@ybiquitous](https://github.com/ybiquitous)). - Added: `ignore: ["after-custom-property"]` to `custom-property-empty-line-before` ([#8627](stylelint/stylelint#8627)) ([@imkesin](https://github.com/imkesin)). - Fixed: `cache` configuration property not being respected ([#8599](stylelint/stylelint#8599)) ([@ybiquitous](https://github.com/ybiquitous)). - Fixed: `fastest-levenshtein` import when bundling ([#8621](stylelint/stylelint#8621)) ([@onigoetz](https://github.com/onigoetz)). - Fixed: `named-grid-areas-no-invalid` false positives for interpolated grid-template-areas in CSS-in-JS ([#8606](stylelint/stylelint#8606)) ([@shahana308](https://github.com/shahana308)). - Fixed: `selector-pseudo-*-no-unknown` false positives for the missing form control styling selectors ([#8623](stylelint/stylelint#8623)) ([@tyrann0us](https://github.com/tyrann0us)).

Added logic to treat named colors as having the same syntax for dupli…

0514f8a

…cate detection; added comprehensive tests for named color scenarios

sw1tch3roo force-pushed the fix-duplicate-properties-named-colors branch from 0cc8154 to 0514f8a Compare July 10, 2025 10:07

Merge branch 'main' into fix-duplicate-properties-named-colors

bb75bad

Mouvedia reviewed Jul 10, 2025

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lib/rules/declaration-block-no-duplicate-properties/__tests__/index.mjs Outdated Show resolved Hide resolved

sw1tch3roo added 2 commits July 11, 2025 01:24

Restrict named color equivalence logic to single-value color properti…

e10a1f1

…es only, preventing false negatives for properties like scrollbar-color, border-color, and animation-name

Merge remote-tracking branch 'origin/fix-duplicate-properties-named-c…

69db2d7

…olors' into fix-duplicate-properties-named-colors

Fix to treat named colors as same syntax

2286e02

Merge branch 'main' into fix-duplicate-properties-named-colors

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Merge branch 'main' into fix-duplicate-properties-named-colors

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Merge branch 'main' into fix-duplicate-properties-named-colors

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Merge branch 'main' into fix-duplicate-properties-named-colors

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Merge branch 'main' into fix-duplicate-properties-named-colors

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ybiquitous approved these changes Jul 24, 2025

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Merge branch 'main' into fix-duplicate-properties-named-colors

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jeddy3 merged commit 6b50582 into stylelint:main Jul 25, 2025
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Fix `declaration-block-no-duplicate-properties` false negatives for named colors with `ignore: ['consecutive-duplicates-with-different-syntaxes']` #8665

Fix `declaration-block-no-duplicate-properties` false negatives for named colors with `ignore: ['consecutive-duplicates-with-different-syntaxes']` #8665

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Fix declaration-block-no-duplicate-properties false negatives for named colors with ignore: ['consecutive-duplicates-with-different-syntaxes'] #8665

Fix declaration-block-no-duplicate-properties false negatives for named colors with ignore: ['consecutive-duplicates-with-different-syntaxes'] #8665

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Fix `declaration-block-no-duplicate-properties` false negatives for named colors with `ignore: ['consecutive-duplicates-with-different-syntaxes']` #8665

Fix `declaration-block-no-duplicate-properties` false negatives for named colors with `ignore: ['consecutive-duplicates-with-different-syntaxes']` #8665

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