HasMethod

Since v1.3.0

Check if an object type has a specific method. Returns true if the property key exists on the object type and its value is a function type.

Signature

export type HasMethod<T, K> = K extends keyof T
	? T[K] extends (...args: any[]) => any
		? true
		: false
	: false

Parameters

Parameter	Description
T	The object type to check
K	The property key to look for as a method

Examples

Basic Usage

import type { HasMethod } from 'uni-types'

type Service = { getName: () => string; age: number }
type HasGetName = HasMethod<Service, 'getName'> // true
type HasAgeMethod = HasMethod<Service, 'age'> // false

With Interface Methods

import type { HasMethod } from 'uni-types'

type ApiClient = { fetch: (url: string) => Promise<any>; baseUrl: string; post: (url: string, body: any) => Promise<any> }
type HasFetch = HasMethod<ApiClient, 'fetch'> // true
type HasBaseUrl = HasMethod<ApiClient, 'baseUrl'> // false