So before we dive into this course, let's first define JavaScript. What is JavaScript? JavaScript simply is a programming language that allows you to implement complex things on the web. So JavaScript is used basically, to manipulate web pages in a certain way, most likely, in a way that is attractive to the user, or to accomplish a specific end goal. And as we know, pages, web pages, created using HTML and CSS yes to add some style. And then came JavaScript, which will let you dynamically control everything about that page.

So it enables you to create dynamically updating content and control multimedia animates in Images and much, much, much more. And in the past, webpages were stationary. But JavaScript revolutionized this in the web. So the web nowadays is dynamic. And it's almost impossible to find a website that is not dynamic. And I'm going to show you some examples.

So for example, we have this website, The New York Times. For example, if I scroll, as I scroll, as you can see, the upper bar appears as a scroll, and that is done by JavaScript. And if I keep scrolling, things dynamically might appear or disappear or anything could could pop up in the screen. So these things happen dynamically by JavaScript. And another good example is that here if I click on this, three lines, I'm going to get video where I, where I can choose from. So instead of just displaying the menu all the time, the menu can be only displayed when I want to see when I want to click on something or when I want to move to another category, but if I don't, it will just disappear.

And this is great in JavaScript. Another good example is the guardian. For For example, here, they have a word called hero search. But the search bar does not exist. But if I click on this small arrow here, I'm going to get this search bar. And that's, that's amazing, because this is a very good user experience practices, because the user doesn't want everything to be in front of them all the time and distract them while they are doing stuff on the web.

They want to do something or read something without being distracted and JavaScript will We'll make the user experience just perfect. A very important concept I want you to know now is the front end and the back end side of the way. So what is the front end? The front end is the user interface and what the user can see and interact with, as we just saw with these websites. But the back end is the code that runs behind the scenes. And the user cannot see or interact with, like storing and fetching data from and to databases.

So this concept is very, very important. And you need to understand that now, because I'm going to explain something related to this and related to JavaScript shortly. So JavaScript has many frameworks, which is just a complete set of tools that will let you do exactly what Buell JavaScript does, but without reinventing the wheel. So they are just written in JavaScript. And you just need to use it rather than writing, writing your own code from the beginning. So JavaScript, when you learn JavaScript, and when you finish learning JavaScript, you will be able to use these libraries.

And they will just make your life much easier. And you can just use the code that inside these libraries instead of writing your own code. And finally, it's extremely important to know that JavaScript is a front end programming language. But recently, it became a front end and a back end programming language after the release of no GS, which is just a JavaScript framework that's developed is to serve the back inside of the way. So now nowadays, JavaScript is not limited to the front end. Inside JavaScript can work on the back end, which means that JavaScript is a very unique language that will let you work on the front if you want, as well as the back end.

So it's very powerful. If you know JavaScript, you can literally do anything with with only one programming language. And you don't have to learn a list of programming languages. Because JavaScript, as we just learned, can do basically everything. So this was just a quick introduction to JavaScript and later we will dive into the course