IntelliSense/autocomplete doesn't work for object keys

[woophi]

Bug Report

🔎 Search Terms

generics object keys, autocomplete

🕗 Version & Regression Information

• This is the behavior in every version I tried, and I reviewed the FAQ

⏯ Playground Link

Playground link with relevant code

💻 Code

const select_fn = <T, K extends keyof T>(dataKey: K) => { };

const select_fn_with_data = <T, K extends keyof T>(data: T, dataKey: K) => { };

type CommonObj = {
    elements: string[],
    id: number;
    name: string;
}

const cObj: CommonObj = {
    elements: [],
    id: 1,
    name: ''
}

select_fn<CommonObj, 'elements'>('elements') // works ts check of types
select_fn<CommonObj, ''>('') // no autocomplete, but shows error - Type '""' does not satisfy the constraint 'keyof CommonObj'

select_fn_with_data(cObj, 'elements') // works fine

🙁 Actual behavior

no keys in autocomplete

🙂 Expected behavior

when I provide an object type to the first generic param, I expect that autocomplete works and shows keys in the second generic param.

[MartinJohns]

Sounds like a duplicate of #28662.

[typescript-bot]

This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.