I think the parent comment is referencing how much is built into JS natively today that people used to use jquery to do. Jquery is also a library not unlike an

I think the parent comment is referencing how much is built into JS natively today that people used to use jquery to do. Jquery is also a library not unlike any other a la react, redux, observables etc. Jquery was successful but now there are better more powerful tools. Lots of jquery can now be done natively or with better tools.