resume-client-socket.io/test/app/node_modules/moment/src/lib/utils/is-function.js

Resume Client API for Socket.IO and Node.JS - Medical Speech to Summarized Text

export default function isFunction(input) {
    return (
        (typeof Function !== 'undefined' && input instanceof Function) ||
        Object.prototype.toString.call(input) === '[object Function]'
    );
}