Stability: 0 - Deprecated: Use typeof value === 'function' instead.

    • object {any}
    • Returns: {boolean}

    Returns true if the given object is a Function. Otherwise, returns false.

    1. const util = require('util');
    3. function Foo() {}
    4. const Bar = () => {};
    6. util.isFunction({});
    7. // Returns: false
    8. util.isFunction(Foo);
    9. // Returns: true
    10. util.isFunction(Bar);
    11. // Returns: true