I have worked with industry giants in e-commerce, architected, designed, and implemented complex end-to-end systems in Javascript. I have been a member of a core interview panel for senior Javascript positions for three years. I have conducted classes in basic and advanced Js concepts to several fellow developers and spoken at conferences over the years.
Whatever problems you are facing, not only will I help you get a deeper understanding and be able to solve them, I will also help you get a firm grasp on all the basics in an effortless manner, so you don't ever face difficulties in the future again.