30-seconds-of-code/snippets/isFunction.md

title, tags, expertise, firstSeen, lastUpdated

title	tags	expertise	firstSeen	lastUpdated
Value is function	type,function	beginner	2017-12-17T17:55:51+02:00	2020-09-15T16:28:04+03:00

Checks if the given argument is a function.

• Use typeof to check if a value is classified as a function primitive.

const isFunction = val => typeof val === 'function';

isFunction('x'); // false
isFunction(x => x); // true