The course you're looking for, Practical JavaScript, has been replaced by a completely new and improved course introductory course. This latest iteration incorporates all of the hard-won lessons we have learned teaching thousands of students since 2014.
We've also updated the new course to a paid model. We made the change so we can offer dedicated support for students in a sustainable way. This was necessary because the new lessons and interactive quizzes are much more difficult and rigorous than before.
To learn more about it and enroll, visit our homepage.