Columns created by columnHelper.accessor doesn't know accessorFn or accessorKey

[slhsxcmy]

TanStack Table version

8.14.0

Framework/Library version

18

Describe the bug and the steps to reproduce it

Columns created by columnHelper.accessor has type ColumnDef, which is a union of AccessorColumnDef, DisplayColumnDef, and GroupColumnDef. As a result, they don't know that the accessorFn or accessorKey property exists.

Typing them as narrower types like AccessorFnColumnDef or AccessorKeyColumnDef would allow access to these properties. This is helpful for our current use case where we want to directly call the accessorFn on fake data in unit tests.

Example at the bottom of TS Playground

Your Minimal, Reproducible Example - (Sandbox Highly Recommended)

See above

Screenshots or Videos (Optional)

Do you intend to try to help solve this bug with your own PR?

Yes, I am also opening a PR that solves the problem along side this issue

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