Obviously you want detailed documentation too, and examples are great for quickly grasping bigger concepts and how to integrate into other systems. In my experience the best solution are both, where examples all have hyperlinks to the actual documentation for everything involved in the example. React is a good example in my opinion; there is detailed documentation of the api, overviews of the concepts, as well as examples that are included where necessary and as part of a walkthrough.
Even better are the challenges at the end of their examples which force you to rethink what you just read.