I'm curious about the goal here... if you wanted to learn how to turn gameplay ideas into playable video games, then the most effective way would be picking up either an ultralight engine like Defold or an ultra-tutorialized engine like Unity.

If you wanted to learn JavaScript by building games, then you should definitely not use Kaplay or Phaser, etc, since they're so far removed from JavaScript you wouldn't learn anything (other than how to build things in their particular environments). Web standard JS is more than capable of building simple games with no abstractions separating you from what you're trying to learn.