Utilizing TypeScript generic types as a key for an object

function createRecord<T extends string>(key: T): Record<T, string> {
        return { [key]: 'asdf' };
    }

Encountering an issue:

The type '{ [x: string]: string; }' is not matching with the expected 'Record<T, string>' type. ts(2322)

Looking for a solution to resolve the error and activate auto-completion on the outcome object.

Note: Avoiding the use of

return { [key]: 'asdf' } as Record<T, string>

Answer №1

Reorganize the code to include signature in an overloaded function:

function generateRecord<T extends string>(key: T): Record<T, string>;
function generateRecord(key: string) {
    return { [key]: 'example' };
}

Try it out

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