It teaches you a very good start onto the basic’s.
Would reccomend you to use a different source as well thou since they might explain it in another way that might helps you understand a certain concept.
Everything ever would be close to impossible since learning everything about, JS ever would take over 10 years to lear and not necceary either.
understood and thank you
then a few js concepts would be enough to create an app or whatever?
Sure. One of the nice things about the FCC curriculum is that it has coding projects along the way that help you build up your skills at making things.