I keep a big list of links to high-quality tutorials on React and related topics ([0]). As part of that list, I have a page of links to Javascript learning resources ([1]). In particular, I highly recommend "Eloquent Javascript" ([2]), "You Don't Know JS" ([3]), and everything ever written by Dr. Axel Rauschmayer ([4]).
[0] https://github.com/markerikson/react-redux-links
[1] https://github.com/markerikson/react-redux-links/blob/master...
[2] http://eloquentjavascript.net/