Generated declaration files might have redundant types of template refs

[makedopamine]

Vue - Official extension or vue-tsc version

2.1.10

VSCode version

Vue version

3.5.13

TypeScript version

5.5.4

System Info

No response

package.json dependencies

No response

Steps to reproduce

Run npx vue-tsc to genereate .d.ts files

What is expected?

If template refs aren't exposed as public, their types should be 'tree-shaken' from generated .d.ts files.

What is actually happening?

The type of barRef is contained in the generated file Foo.vue.d.ts, but actually it or its properties aren't exposed from Foo.vue with slot or defineExpose.

Link to minimal reproduction

https://stackblitz.com/edit/stackblitz-starters-jtpv84

Any additional comments?

No response

[KazariEX]

Tree shake is the responsibility of the bundler, not the transpiler.

[KazariEX]

I think the output is correct because the refs declared on the template is automatically mounted to the $refs of the component.

[makedopamine]

The truth is that the transpiler(Typescript Compiler) can tree-shake unused code. If you remove <slot></slot> from the template block in Foo.vue, then re-run npx vue-tsc, you will notice that the helper function __VLS_template is removed from the file Foo.vue.d.ts. I think if we could split __VLS_template into multiple functions, such as __VLS_template_slots and __VLS_template_refs, the generated code would be more tree-shaking-friendly.

[KazariEX]

I see, but these are two unrelated issues. Anyway,

the refs declared on the template is automatically mounted to the $refs of the component.