A Beginner’s Guide to Javascript


JavaScript is a popular scripting language that’s widely used to create dynamic web pages. It’s used by tech giants like Google, Facebook, Amazon, and Twitter to give static information more functionality and make it come to life with 2D/3D graphics, animated images, interactive pop-up videos, and real-time content updates.

Javascript is one of the most popular programming languages and can be found on nearly 98% of websites. It’s most commonly used to create dynamic user interfaces on the web, but it also can be used for back-end web development.

The JavaScript language is written in the form of a text file and can be embedded on HTML pages. When a user requests the page, the JavaScript code is sent to their browser, which interprets it and automatically executes it on the user’s device. The result is a seamless user experience without any intervention from the user.

It is a very flexible scripting language that can be used on both the client and server side. It has support for a wide range of technologies and can be used to build everything from servers and mobile apps to web applications, games, and more.

JS is a typed language which means that you can annotate your variables with types such as string, int, or float. This can help you know what data is being stored in them and how it will be used in your coding.

You’ll also want to learn about prototypal inheritance, which allows objects in your code to inherit the behaviors of other objects. This is a great way to speed up your code and reduce the number of lines of code you need.

There are several ways to implement a prototypal inheritance structure. You can define a new class that will be responsible for the behavior of each of the prototypes, or you can use template classes which are predefined behaviors.

Variables and Functions

The first thing you’ll need to understand about JS is that it is a single-threaded language which means that it runs only one instruction at a time on the CPU. This can cause performance issues if you’re using a lot of functions that take time to process, as the code will block the JS engine.

Another important feature of JS is the Event Loop, which allows it to offload long-running tasks to separate threads. This can free up the main JS thread so that it can run other code while it waits for the tasks to finish.

It can also be very efficient, allowing you to do things such as add animations to menus and fade outs, upload file forms, and image galleries. These features can all be very complex to code from scratch, so it’s helpful to have frameworks and libraries that help you kick off projects with a lot less hassle.

The best part about JS is that it’s very easy to learn and implement, and it can be used on both the client and server sides. If you’re interested in learning how to use JS, there are tons of resources out there to get you started. The most important thing is to practice and start getting familiar with it so that you’ll be able to get the most out of it.