Type mismatch between :key & v-for index

[valdoryu]

Version

3.0.11

Reproduction link

https://gofile.io/d/RgpasT

Steps to reproduce

Every project using typescript & having a v-for

Reproduction is just a dummy ts component with a v-for. Using it in VSCode with Volar will display the error

What is expected?

V-for "index" arg type is defined as:
const index: string | number | symbol

What is actually happening?

"Key" prop type is defined as:
(property) key?: string | number | undefined

As you can see, it is missing symbol coverage, producing type errors if we don't manually toString() or parseInt() the index in the template

[edison1105]

I think this is about Volar and string | number is recommended key type, not symbol.
BTW, We recommend using sfc.vuejs.org to create a reproduction.

[yyx990803]

I can't reproduce this locally and your file download link doesn't seem to work (stuck at downloading)

Just pasting the content of the file directly here would be easier...

[edison1105]

@yyx990803
What he was trying to say was probably this：

Volar display an error.

[posva]

Duplicate of #2633

[valdoryu]

Sorry guys, I tried to reproduce with typescript in the proposed repro tools without success.
I'll try better next time.

Issue is indeed #2633