Due to its popularity, developers around the world have introduced hundreds of front-end plugins and frameworks based on JQuery. Many of them have become popular. This is how this library really took its roots. While it is obvious that the library is gradually losing ground, it is nonetheless relevant.
Many websites use it. According to BuiltWith, JQuery is still used by 77% of the top 1 million websites. So if you ever come across such a website, you must know about the library. Besides its popularity, JQuery is a good library. The chaining methods are clean and elegant.