Usage

type A = BoxedPrimitive<string>; // ^? String
type B = BoxedPrimitive<number>; // ^? Number

Installation

CLI

npx atmx add type boxed-primitive

Manually

Copy and paste the following method into @/utils/helpers/undefined.ts:

/**
* Coerce a primitive type to its boxed equivalent.
*
* @example
* type A = BoxedPrimitive<string> // ^? String
* type B = BoxedPrimitive<number> // ^? Number
*/
export type BoxedPrimitive<T> = T extends string
? String
: T extends number
? Number
: T extends boolean
  ? Boolean
  : T extends bigint
    ? BigInt
    : T extends symbol
      ? Symbol
      : T;