is-function-x

is-function-x

Determine whether a given value is a function object.

module.exports(value, [allowClass]) ⇒ boolean ⏏

Checks if value is classified as a Function object.

Kind: Exported function
Returns: boolean - Returns true if value is correctly classified, else false.

Param	Type	Default	Description
value	*		The value to check.
[allowClass]	boolean	false	Whether to filter ES6 classes.

Example

import isFunction from 'is-function-x';

console.log(isFunction()); // false
console.log(isFunction(Number.MIN_VALUE)); // false
console.log(isFunction('abc')); // false
console.log(isFunction(true)); // false
console.log(isFunction({name: 'abc'})); // false
console.log(isFunction(function() {})); // true
console.log(isFunction(new Function())); // true
console.log(isFunction(function* test1() {})); // true
console.log(isFunction(function test2(a, b) {})); // true
console.log(isFunction(async function test3() {})); // true
console.log(isFunction(class Test {})); // false
console.log(isFunction(class Test {}, true)); // true
console.log(
  isFunction((x, y) => {
    return this;
  }),
); // true