https://github.com/LeDDGroup/typescript-conditional-types

Helpers for typescript generic types
https://github.com/LeDDGroup/typescript-conditional-types

typescript

Last synced: about 1 year ago
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Helpers for typescript generic types

• Host: GitHub
• URL: https://github.com/LeDDGroup/typescript-conditional-types
• Owner: LeDDGroup
• License: mit
• Created: 2018-12-21T16:09:27.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2020-07-13T22:00:32.000Z (almost 6 years ago)
• Last Synced: 2025-04-07T05:33:13.368Z (about 1 year ago)
• Topics: typescript
• Language: TypeScript
• Size: 31.3 KB
• Stars: 50
• Watchers: 1
• Forks: 3
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

          
# typescript-conditional-types

[![npm version](https://img.shields.io/npm/v/typescript-conditional-types.svg)](https://www.npmjs.com/package/typescript-conditional-types)

[![Conventional Commits](https://img.shields.io/badge/Conventional%20Commits-1.0.0-yellow.svg)](https://conventionalcommits.org)

[![code style: prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square)](https://github.com/prettier/prettier)

Helpers for typescript generic types

**Table of Contents**

- [Motivation](#motivation)

- [Install](#install)

- [Type Helper List](#type-helper-list)

- [Usage Example](#usage-example)

## Motivation

Creating complex types with conditional types ( `T extends U ? X : Y` ) could be a little verbose. This package aims to simplify code and make it more readable.

## Install

```bash

$ npm install typescript-conditional-types

```

You'll probably want to save it in the _devDependencies_

## Type Helper List

- _If_: If _Condition_ is `true` resulting type is _Then_ else _Else_

- _And_: `true` if _A_ and _B_ are both `true` else `false`

- _Or_: `true` if _A_ or _B_ are `true` else `false`

- _Not_: Negate _A_

- _Extends_: `true` if _A_ extends _B_ like in `A extends B ? true : false`

- _Extends, Then, Else>`


## Usage Example

```ts

import { If } from "typescript-conditional-types";

type BooleanToString = If

BooleanToString // "true"

BooleanToString // "false"

```