954,956c954 < var < el = document.createElement("div"), < unwrappedEl = el.wrappedJSObject || el; --- > var el = document.createElement("div"); 959c957 < var isSupported = (eventName in unwrappedEl); --- > var isSupported = (eventName in el); 962c960 < isSupported = typeof unwrappedEl[eventName] === "function"; --- > isSupported = typeof el[eventName] === "function"; 965d962 < unwrappedEl = null;