I would have to say that jquery is the most vital piece of the jQuery suite, but there are many other JS libraries that are equally important, for example the jQuery UI library.
If you’re interested in jQuery’s features and how the library works, there are many tutorials on YouTube that teach you everything you need to know. Just make sure you understand some of the basics before you learn how to implement the jQuery methods you’re interested in.
The first thing you need to know is that jQuery doesn’t have the concept of “adding” something, it’s just a function with a name that tells you what it does. To add, jQuery calls the method, but you can call it with a bunch of other methods. For example, to add a class like on a webpage, jQuery calls the “addClass” method, and then uses the “removeClass” method to remove the class.
So when you think about jQuery, you probably think of the function addClass, but adding a class is just a function call, you can also call it like on an object, like the addClass method. You can also call it on an element, like adding a class to a DIV that’s inside an A tag. So jQuery has many methods that you can call on to add or remove classes.
jQuery has a lot of useful functionality. You can use jQuery to bind to events, manipulate elements (like changing styles), and manipulate the DOM. If you were writing a jQuery plugin, you could also use the jQuery.fn.init method to create new objects. You could also call the jQuery object itself, to make it act like a class on the DOM, so you could make new elements or classes from it.