Returns a boolean for whether the two given types are equal.
https://github.com/microsoft/TypeScript/issues/27024#issuecomment-421529650 https://stackoverflow.com/questions/68961864/how-does-the-equals-work-in-typescript/68963796#68963796
Use-cases:
- If you want to make a conditional branch based on the result of a comparison of two types.
Example 1
Example 1
import type {IsEqual} from 'type-fest'; // This type returns a boolean for whether the given array includes the given item. // `IsEqual` is used to compare the given array at position 0 and the given item and then return true if they are equal. type Includes<Value extends readonly any[], Item> = Value extends readonly [Value[0], ...infer rest] ? IsEqual<Value[0], Item> extends true ? true : Includes<rest, Item> : false;