When comparing Crockford on JavaScript vs Udacity, the Slant community recommends Udacity for most people. In the question“What are the best resources to learn JavaScript?” Udacity is ranked 10th while Crockford on JavaScript is ranked 16th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Beginner focused
These lectures start at the very beginning with a recap of computer history and evolution of programming in order to give context to everything that's being taught later and to make sure no topic skipped.
Pro Courses taught by industry professionals
Pro All courses are self-paced
Courses are always made available which means there is no waiting for the specific course you want to run. You can work through the courses as fast or as slow as you want.
Pro Offers Nanodegrees
Udacity offers a few different Nanodegrees which provide access to various different courses, project reviews and coaching support for $200/month.
Current options include Front End Web Developer, Data Analyst and Android Developer. See the full list here.
Pro Courses are easy to understand
Pro Actual feedback on coding projects
You get actual feedback from developers on your code, which is useful. Yes having your sites/apps do what it is supposed to do is important, but you need feedback to learn industry standards/best practices and other gotchas that are much harder to learn on your own.
Pro Language that is easy to understand
Courses are super easy to follow, even for super dummies.
Pro Worth the investment
Cons
Con Somewhat outdated
These videos are from 2011 and cover topics such as introducing ECMAScript5.
Con Nanodegrees are expensive
Udacity is quite expensive at $200/month if you want to do a nanodegree.