Not

Since 1.1.0

Logical NOT operator for boolean types.

Signature

type Not<B extends boolean> = B extends true ? false : true

Parameters

Parameter	Description
B	The boolean type to negate

Examples

Basic Usage

import type { Not } from 'uni-types'

type A = Not<true>   // false
type B = Not<false>  // true

With Conditionals

import type { Not, IsAny } from 'uni-types'

type IsDefined<T> = Not<IsAny<T>>

type A = IsDefined<string>  // true
type B = IsDefined<any>     // false

Related

• If - Conditional types
• And - Logical AND
• Or - Logical OR