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Also know, what do you use jQuery for?

jQuery is a lightweight, "write less, do more", JavaScript library. The purpose of jQuery is to make it much easier to use JavaScript on your website. jQuery takes a lot of common tasks that require many lines of JavaScript code to accomplish, and wraps them into methods that you can call with a single line of code.

Additionally, is jQuery still relevant 2020? Heres the thing ,Jquery works just as well in 2020 as it did in 2010, its small, its efficient and does what it does very very easily.

Keeping this in view, is it worth learning jQuery in 2019?

JQuery is not a necessity in 2019 because browser support for Javascript is more consistent than ever. So, should you learn Jquery if you don't know it? Yes, especially if you are in a doubt whether to learn it or not. It is a simple and beautiful library without much learning curve.

Do I need jQuery With react?

If you think you need JQuery in your React app you're doing it wrong. React is a great library for making changes to the DOM. There are lots of good features about React that make it easy to modify elements. Let's take a look at a common use case in manipulating the DOM and see how it's done in React.