RestrictiveReadonlyRecord
Packages > @fluidframework/tree > RestrictiveReadonlyRecord
Alternative to the built in Record type which does not permit unexpected members, and is readonly.
This API is deprecated and will be removed in a future release.
Use a more robust / specific type instead. This type never worked as intended.
Signature
export type RestrictiveReadonlyRecord<K extends symbol | string, T> = {
readonly [P in symbol | string]: P extends K ? T : never;
};
Type Parameters
| Parameter | Constraint | Description |
|---|---|---|
| K | symbol | string | |
| T |
Remarks
This does not work correctly when K is more specific than string or symbol. For example {a: 5} is not assignable to RestrictiveReadonlyRecord<"a",: number>