Edit File: mutable.d.ts
/** Convert an object with `readonly` keys into a mutable object. Inverse of `Readonly<T>`. This can be used to [store and mutate options within a class](https://github.com/sindresorhus/pageres/blob/4a5d05fca19a5fbd2f53842cbf3eb7b1b63bddd2/source/index.ts#L72), [edit `readonly` objects within tests](https://stackoverflow.com/questions/50703834), and [construct a `readonly` object within a function](https://github.com/Microsoft/TypeScript/issues/24509). @example ``` import {Mutable} from 'type-fest'; type Foo = { readonly a: number; readonly b: string; }; const mutableFoo: Mutable<Foo> = {a: 1, b: '2'}; mutableFoo.a = 3; ``` */ export type Mutable<ObjectType> = { // For each `Key` in the keys of `ObjectType`, make a mapped type by removing the `readonly` modifier from the key. -readonly [KeyType in keyof ObjectType]: ObjectType[KeyType]; };
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