Simplify

Kind: Type

Source: src/utils/types.ts

Part of: Utils

Useful to flatten the type output to improve type hints shown in editors. And also to transform an interface into a type to aide with assignability.

Simplify<T> remaps the properties of T into a plain object type, which makes expanded type hints easier to read in editors. It can also convert an interface-shaped type into a type alias shape for assignability checks.

Definition

ts
{ [KeyType in keyof T]: T[KeyType] } & {}

Diagram

mermaid
graph LR
  A[Input type T] --> B[Simplify<T>]
  B --> C[Remapped object properties]
  C --> D[Clearer editor type hints]
  C --> E[Type alias assignability]

Usage

ts
type Simplify<T> = {
  [Key in keyof T]: T[Key];
};

interface User {
  id: string;
  name: string;
}

type UserRecord = Simplify<User>;

const user: UserRecord = {
  id: "user_123",
  name: "Ada",
};

AI Coding Instructions

• Apply Simplify<T> when an intersection or mapped type produces hard-to-read editor hints.
• Keep Simplify type-only; it does not transform values at runtime.
• Use it near public type boundaries where consumers benefit from a remapped object shape.
• Do not expect Simplify<T> to change property values, optionality, or readonly modifiers.