static isElement(obj) {
        // return !!(obj && obj.nodeName);
        // return obj && 'nodeType' in obj;
        // return obj instanceof Element || obj instanceof HTMLInputElement || obj instanceof HTMLElement;
        if (typeof Element === 'undefined') {
            // This test is needed in environnements where the Element object does not exist (ie. in web workers)
            return false;
        }

        return obj instanceof Element;
    }
Return `true` if the parameter is a DOM element
cf. http://stackoverflow.com/a/4754104/2834898

@param {*} obj
@returns {boolean}