The default configuration of the tool detects goog.Disposable objects which were not dispose()d. goog.EventTarget is a subclass of goog.Disposable, and if an EventTarget is not disposed, event listeners are not discarded properly, and event listeners in turn keep DOM objects alive. It's possible to configure the tool to detect other similar misuses.
You can find more details about this project here.
"Blue screen" has become one notorious symbol of Windows. Maybe you have seen the Windows blue screen in a few occasions. But have you see it on a wedding? The above is what happens on a wedding. What if Bill Gates attends a wedding and see this famous scene? The image source is dedicated to Sina We