Vue3: Add test for generic components with CSF factories

[kasperpeulen]

Related to #24238

What I did

This PR adds a unit test demonstrating that generic Vue components (using <script lang="ts" setup generic="T">) work correctly with CSF Next.

The key finding: With CSF Next, you can pass the type parameter directly:

const meta = preview.meta({
  component: GenericComponent<{ id: number; name: string }>,
});

const Story = meta.story({
  args: {
    items: [{ id: 1, name: 'John Doe' }],
    getLabel: (item) => item.name, // item is correctly typed!
  },
});

This addresses the long-standing issue #24238 where generic Vue components had type inference issues with traditional CSF3 (the generic type T would default to unknown).

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
• end-to-end tests

Manual testing

No manual testing required - this PR adds a type-level unit test that verifies TypeScript inference works correctly with generic Vue components.

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:merged or ci:daily GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in code/lib/cli-storybook/src/sandbox-templates.ts

• Make sure this PR contains one of the labels below:

  Available labels

  • bug: Internal changes that fixes incorrect behavior.
  • maintenance: User-facing maintenance tasks.
  • dependencies: Upgrading (sometimes downgrading) dependencies.
  • build: Internal-facing build tooling & test updates. Will not show up in release changelog.
  • cleanup: Minor cleanup style change. Will not show up in release changelog.
  • documentation: Documentation only changes. Will not show up in release changelog.
  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
  • other: Changes that don't fit in the above categories.

🦋 Canary release

This PR does not have a canary release associated. You can request a canary release of this pull request by mentioning the @storybookjs/core team here.

core team members can create a canary release here or locally with gh workflow run --repo storybookjs/storybook publish.yml --field pr=<PR_NUMBER>

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 35318b6

Command	Status	Duration	Result
nx run-many -t compile,check,knip,test,pretty-d...	✅ Succeeded	7m 17s	View ↗

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☁️ Nx Cloud last updated this comment at 2026-01-28 11:30:47 UTC

[coderabbitai]

📝 Walkthrough

Walkthrough

Adds a new generic Vue 3 single-file component GenericComponent.vue that renders a selectable list and emits a 'select' event, updates a test file to import and type-check the generic component, and updates a test import to remove unused type names.

Changes

Cohort / File(s)	Summary
New Vue 3 Component code/renderers/vue3/src/__tests__/GenericComponent.vue	New generic Vue SFC (script setup with generic T). Renders an <ul> of items, uses getLabel(item) for labels, tracks selectedItem initialized from defaultSelected, and emits (e: 'select', item: T) when an item is clicked.
Test File Updates code/renderers/vue3/src/csf-factories.test.ts	Removed unused type imports (ComponentAnnotations, StoryAnnotations) from 'storybook/internal/types'. Added GenericComponent import and new tests validating TypeScript generics for the component (including getLabel typing and items length); the new tests appear duplicated.
Documentation docs/api/csf/csf-next.mdx	Added "How do I use generic Vue components?" section under CSF Next docs with a TypeScript example showing passing a generic type to a Vue component in CSF meta and typing args/getLabel.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

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