fix(compiler-sfc): improve scoped style rewriting for nested and non-pseudo :is/:where selectors #12244

edison1105 · 2024-10-23T10:02:09Z

Summary by CodeRabbit

Bug Fixes
- Improved handling of scoped CSS when using nested :is() and :where() pseudo-classes, ensuring the scoped attribute is correctly applied in complex selector scenarios.
Tests
- Added new test cases to verify correct scoping behavior for nested and combined :is() and :where() selectors with ID prefixes.

github-actions · 2024-10-23T10:03:09Z

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	101 kB	38.3 kB	34.5 kB
vue.global.prod.js	159 kB	58.5 kB	52 kB

Usages

Name	Size	Gzip	Brotli
createApp (CAPI only)	46.6 kB	18.2 kB	16.7 kB
createApp	54.5 kB	21.2 kB	19.4 kB
createSSRApp	58.8 kB	23 kB	20.9 kB
defineCustomElement	59.5 kB	22.8 kB	20.8 kB
overall	68.6 kB	26.4 kB	24.1 kB

pkg-pr-new · 2024-10-23T10:03:20Z

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@vue/compiler-ssr

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@vue/reactivity

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@vue/runtime-core

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@vue/runtime-dom

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@vue/server-renderer

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@vue/shared

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vue

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@vue/compat

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commit: 4e2c116

zhangmo8 · 2024-10-24T09:04:39Z

This will cause pattern pollution and scoped will not work

zhangmo8 · 2024-10-24T09:24:01Z

Maybe it's another bug that I reproduced on the current official playground

I created a new issue to track it #12252

edison1105 · 2024-10-24T09:33:05Z

@zhangmo8

According to the document, I believe the behavior with this PR is proper.

zhangmo8 · 2024-10-24T09:59:26Z

This pr is correct, you are so cool @edison1105

skirtles-code · 2025-05-19T20:56:30Z

I'm wondering about nesting :is() inside :is():

Playground

A selector like :is(:is(.foo)) seems to be scoped correctly, but not #app :is(:is(.foo)).

coderabbitai · 2025-05-20T13:49:10Z

Walkthrough

The changes update the logic for handling scoped CSS selectors, specifically improving how nested :is() and :where() pseudo-classes are processed to ensure the scoped attribute is correctly injected. Additional tests were added to verify this behavior in complex selector scenarios, confirming accurate scoping within nested pseudo-classes.

Changes

File(s)	Change Summary
packages/compiler-sfc/src/style/pluginScoped.ts	Enhanced logic in `rewriteSelector` to better handle nested `:is()` and `:where()` pseudo-classes for scoping by adding a helper function and expanding conditions.
packages/compiler-sfc/tests/compileStyle.spec.ts	Added tests to verify correct scoping with nested and combined `:is()` and `:where()` selectors.

Sequence Diagram(s)

sequenceDiagram
    participant TestSuite
    participant Compiler
    participant SelectorRewriter

    TestSuite->>Compiler: Compile SFC with scoped CSS
    Compiler->>SelectorRewriter: Rewrite selectors for scoping
    SelectorRewriter->>SelectorRewriter: Check for :is()/:where() (including nesting)
    SelectorRewriter->>SelectorRewriter: Inject scoped attribute as needed
    SelectorRewriter-->>Compiler: Return rewritten selectors
    Compiler-->>TestSuite: Output compiled CSS

Assessment against linked issues

Objective	Addressed	Explanation
Ensure scoped CSS correctly handles pseudo-classes like :is()/:where(), including nested cases (#12241)	✅
Inject scoped attribute within selectors when using ID selector prefixes and pseudo-classes (#12241)	✅

Suggested reviewers

edison1105

Poem

In tangled CSS where selectors roam,
The rabbit hops through :is() and calls it home.
With scoping now clever, and nesting in view,
Each style finds its mark, as all rabbits knew.
So here’s to selectors, now handled with care—
No more lost styles, just harmony everywhere! 🐇✨

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Reviewing files that changed from the base of the PR and between 759d5b4 and 4e2c116.

📒 Files selected for processing (2)

packages/compiler-sfc/__tests__/compileStyle.spec.ts (1 hunks)
packages/compiler-sfc/src/style/pluginScoped.ts (3 hunks)

🚧 Files skipped from review as they are similar to previous changes (2)

packages/compiler-sfc/src/style/pluginScoped.ts
packages/compiler-sfc/tests/compileStyle.spec.ts

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edison1105 · 2025-05-20T13:58:33Z

@skirtles-code
fixed via 8d9f49c

packages/compiler-sfc/src/style/pluginScoped.ts

fix(compiler-sfc): properly rewrite :is with non-pseudo selector

afbda36

edison1105 added ready to merge The PR is ready to be merged. scope: sfc labels Oct 23, 2024

edison1105 added the 🔨 p3-minor-bug Priority 3: this fixes a bug, but is an edge case that only affects very specific usage. label Jan 7, 2025

test: add more tests

8d9f49c

edison1105 and others added 2 commits May 20, 2025 21:53

Merge branch 'main' into edison/fix/12241

47c0f03

[autofix.ci] apply automated fixes

74dfcf7

edison1105 changed the title ~~fix(compiler-sfc): properly rewrite :is with non-pseudo selector~~ fix(compiler-sfc): improve scoped style rewriting for nested and non-pseudo :is/:where selectors May 20, 2025

skirtles-code reviewed May 20, 2025

View reviewed changes

packages/compiler-sfc/src/style/pluginScoped.ts Outdated Show resolved Hide resolved

edison1105 and others added 3 commits May 21, 2025 08:22

test: add more tests

759d5b4

Merge branch 'main' into edison/fix/12241

ec7ff38

[autofix.ci] apply automated fixes

4e2c116

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