ts-essentials/dist/mark-readonly/index.d.ts

All essential TypeScript types in one place

import { ReadonlyKeys } from "../readonly-keys";
import { Writable } from "../writable";
import { Prettify } from "../prettify";
export type MarkReadonly<Type, Keys extends keyof Type> = Type extends Type ? Prettify<Readonly<Type> & Writable<Omit<Type, Keys | ReadonlyKeys<Type & object>>>> : never;