If you have a strong knowledge in programming and want to improve your JavaScript skills or you want a good reference book then this list is for you.We've put together a list of 12 of our favorite JavaScript free book to help save you time and energy along the way. If you know of other great resources, feel free to share them in the comments.1. HTML CANVAS DEEP DIVEBy Josh MarinacciFor those who allready know JavaScript basics and wants to learn HTML Canvas.Canvas is a 2D drawing API recently added to HTML and supported by most browsers (even Internet Explorer 9…