A lodash-like library for types, with support for type-level lambda functions.
🚧 work in progress 🚧
You can find HotScript on npm:
npm install -D hotscript
HotScript is a work-in-progress library, so expect breaking changes in its API.
import { Pipe, Tuples, Strings, Numbers } from "hotscript";
// prettier-ignore
type res1 = Pipe<
// ^? 95
[1, 2, 3, 4, 3, 4],
[
Tuples.Map<Numbers.Add<3>>,
Tuples.Join<".">,
Strings.Split<".">,
Tuples.Map<Strings.ToNumber>,
Tuples.Map<Numbers.Add<10>>,
Tuples.Sum
]
>;
import { Call, Fn Tuples } from "hotscript";
// This is a type-level "lambda"!
interface Duplicate extends Fn {
return: [this["arg0"], this["arg0"]];
}
type result1 = Call<Tuples.Map<Duplicate>, [1, 2, 3, 4]>;
// ^? [[1, 1], [2, 2], [3, 3], [4, 4]]
type result2 = Call<Tuples.FlatMap<Duplicate>, [1, 2, 3, 4]>;
// ^? [1, 1, 2, 2, 3, 3, 4, 4]
// Let's compose some functions to transform an object type:
type ToAPIPayload<T> = Pipe<
T,
[
Objects.OmitBy<Booleans.Equals<symbol>>,
Objects.Assign<{ metadata: { newUser: true } }>,
Objects.SnakeCaseDeep,
Objects.Assign<{ id: string }>
]
>;
type T = ToAPIPayload<{
id: symbol;
firstName: string;
lastName: string;
}>;
// Returns:
type T = {
id: string;
metadata: { new_user: true };
first_name: string;
last_name: string;
};
FAQs
A library of composable functions for the type-level! Transform your TypeScript types in any way you want using functions you already know.
We found that hotscript demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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