What is the difference between J Query and JavaScript ?

JavaScript is the programming language that you use to add interactivity to webpages.

JQuery is a JavaScript library which you can use to simplify your coding - rather than having to create JavaScript applications yourself, you can instead utilise the JQuery library in order to use JavaScript applications that other people have already created.

I'll elaborate - jQuery is more or less an api for the javascript language. The creators of jQuery created an easier, simpler syntax for many common DOM manipulation tasks that developers often do on every project.

Let's say you wanted to select an element.

In pure javascript you'd have something like

document.getElementById('my-selector')

In jQuery, it's just simply

$('#my-selector')

You can see how much more tighter, simpler, and CSS like the same jquery selector is.

All jQuery really does is parse the jQuery back down to pure javascript so the browser can do something with it. It gives us easier to work with functions and selectors.