https://github.com/younho9/not

Type guard based on exclude
https://github.com/younho9/not

guard guards ts type type-guard type-guards types typescript

Last synced: about 1 month ago
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Type guard based on exclude

• Host: GitHub
• URL: https://github.com/younho9/not
• Owner: younho9
• License: mit
• Created: 2021-12-21T15:33:18.000Z (over 4 years ago)
• Default Branch: main
• Last Pushed: 2021-12-21T15:38:49.000Z (over 4 years ago)
• Last Synced: 2025-10-29T17:45:49.769Z (8 months ago)
• Topics: guard, guards, ts, type, type-guard, type-guards, types, typescript
• Language: TypeScript
• Homepage:
• Size: 2.93 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# @younho9/not

[![CI](https://github.com/younho9/not/actions/workflows/main.yml/badge.svg)](https://github.com/younho9/not/actions/workflows/main.yml)

[![XO code style](https://img.shields.io/badge/code_style-XO-5ed9c7.svg)](https://github.com/xojs/xo)

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

> Type guard based on exclude

## Install

```sh

$ npm install @younho9/not

```

## Usage

```ts

import not from '@younho9/not';

const isNullable = (value: unknown): value is null | undefined =>

	value === null || value === undefined;

const isNonNullable = not(isNullable);

declare const someValue: string | null | undefined;

if (isNonNullable(someValue)) {

	someValue;

	//=> string

}

```

## LICENSE

[MIT](LICENSE)