Jak w tytule, polecam, lżejszą i szybszą alternatywę dla jQuery.
Umbrella JS - Tiny library for DOM manipulation and events
Covers your javascript needs for those rainy days. A <3kb performant jQuery-like library born from the question: You might not need jQuery, then what do you need?
Is jQuery dead in 2022?
jQuery has seen a significant decline in popularity over the past few years. With the rise of frontend JavaScript frameworks like Angular, Vue and React, jQuery's quirky syntax and often-overwrought implementation has taken a backseat to this new wave of web technology. That said, jQuery still has its uses. For one, it's been used in countless projects ranging from enterprise ecommerce apps to simple landing pages. Secondly, jQuery is still good for certain things, such as rapid prototyping and even animation if you aren't good with CSS. jQuery may be outdated but jQuery is not dead.
jQuery - wiki
jQuery is a JavaScript library designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.[3] It is free, open-source software using the permissive MIT License.[4] As of Aug 2022, jQuery is used by 77% of the 10 million most popular websites.[5] Web analysis indicates that it is the most widely deployed JavaScript library by a large margin, having at least 3 to 4 times more usage than any other JavaScript library.[5][6]