Why is jQuery important?

Answer 1

"jQuery is a fast, small, and feature-rich JavaScript library.

It makes things like HTML document traversal and manipulation, event handling, and animation much simpler.

All the power of jQuery is accessed via JavaScript, so having a strong grasp of JavaScript is essential for understanding, structuring, and debugging your code."

https://www.sololearn.com/learn/jQuery/2782/

Answer 2

https://plainjs.com
http://youmightnotneedjquery.com

Answer 3

because its easyer to use in some projects; JavaScript
document.getElementById("hi");
vs JQuery
$("#hi");

disadvantage:
just javascript works faster

Answer 4

its many times faster to write than javascript. altho its still a javascript library