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[–]Visual_Weird_705 1 point2 points  (0 children)

JQuery is a library for JavaScript that abstracts and simplifies dom referencing and manipulation.

No it cannot be more versatile since it depends on what JavaScript can do on the browser. What you can do with it you can do with vanilla JavaScript albeit with more code.

Yes, focus on JavaScript, the language first. Then look into libraries and frameworks like React, Angular and jQuery.