Mutable

Transforms a type by removing readonly modifiers, allowing mutation of properties.

import type { Mutable } from '@fullstacksjs/toolbox';

type Mutable<T> = {
  -readonly [P in keyof T]: T[P];
};

type Sample = { readonly a: number };
const obj: Mutable<Sample> = { a: 5 };
obj.a = 10; // allowed