JS type verifier

verifier.js

function getTag(any) {
    if (typeof any === 'object' && any !== null) {
        if (typeof any[Symbol.toStringTag] === 'string') {
            return any[Symbol.toStringTag];
        }
        if (typeof any.constructor === 'function' 
                && typeof any.constructor.name === 'string') {
            return any.constructor.name;
        }
    }
    return Object.prototype.toString.call(any).match(/\[object\s(\w+)]/)[1];
}