Type Alias Suggestion<Options, Base>

Suggestion: Options | Base & {}

Provides autocomplete suggestions while still allowing any value of Base.

This is useful when you want to suggest a set of known options in editors, but not restrict the type strictly to those options.

Type Parameters

Options extends Base
Suggested literal values
Base = string
The underlying type (defaults to string)

Example

type Color = Suggestion<"red" | "blue">;

const a: Color = "red";   // ✅ suggested
const b: Color = "green"; // ✅ allowed, not suggested

Example: Works with non-string base types

type Size = Suggestion<1 | 2 | 3, number>;

const a: Size = 2;  // ✅ suggested
const b: Size = 10; // ✅ allowed, not suggested