NightwatchJS has a clean and simple syntax, so tests can be written swiftly. It comes with a built in test runner, it has support for page objects within the framework, and it can be easily extended to create things like custom reporters.

https://testautomationu.applitools.com/nightwatchjs-tutorial/?ref=dimitriharding.com

Introduction to NightwatchJS

What came first, the chicken or the egg?
Most QA professionals only ever use features of a framework, and because of this, it's hard to reason about new tools.

Courses

JavaScript for QA Engineers and SDETs | Interactive Course

Introduction to NightwatchJS