I found the You Don't Know JS series books by Kyle Simpson very helpful. The last one is for ES6. https://github.com/getify/You-Dont-Know-JS https://github.co

I found the You Don't Know JS series books by Kyle Simpson very helpful. The last one is for ES6. https://github.com/getify/You-Dont-Know-JS https://github.com/getify/You-Dont-Know-JS