Is value a function check

README.md

isFunction

The isFunction() is a simple wrapper over

typeof value === 'function'

Previously I was using instanceof but it seems using typeof should faster. And since I do not like putting string literal here and there, I've decided to wrap it into a function.

is-function.js

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

const isFunction = (target) => (typeof target === 'function');

exports.isFunction = isFunction;
exports.default = isFunction;

package.json

{
  "name": "@actualwave/is-function",
  "description": "Is value a function check",
  "version": "0.0.1",
  "main": "is-function.js",
  "keywords": [
    "js",
    "javascript",
    "Function",
    "instanceof",
    "typeof",
    "type",
    "check"
  ],
  "homepage": "https://gist.github.com/burdiuz/553f12cdf2d9dd2a9a8625b8de09fb7a",
  "bugs": {
    "url": "https://gist.github.com/burdiuz/553f12cdf2d9dd2a9a8625b8de09fb7a",
    "email": "burdiuz@gmail.com"
  },
  "license": "MIT",
  "author": "Oleg Galaburda <burdiuz@gmail.com> (http://actualwave.com/)"
}