What Is JavaScript? An Introduction To The Helpful Programming Language

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By Faraz -

Have you ever wanted to learn how to code but felt like it was too difficult or too time consuming? Now it is easier than ever, thanks to JavaScript. In this article, you'll learn what JavaScript is and why it's useful for programmers.

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JavaScript is a programming language that enables developers to create interactive websites and applications. It is used in a wide variety of contexts, including back-end web development, front-end development, real-time web applications, and mobile applications. In this article, we'll cover the basics of how JavaScript works and how you can use it to create sophisticated web applications.

What is JavaScript?

JavaScript is a programming language that enables you to create interactive websites and web applications. JavaScript is also used for client-side scripting on the web. You can use JavaScript to create scripts that interact with the user and to control the display of information on a web page. JS allows you to specify how information is displayed on a web page, including in forms and dialog boxes.

When was JavaScript created?

JavaScript was created in 1995 by Brendan Eich, who also developed the popular browser extension Firefox. It grew in popularity thanks to its widespread use on the web, especially in combination with HTML5 and other open source technologies.

Features of JavaScript

It has many features that make it a powerful tool, including:

  • It is easy to learn because it has few keywords and no specific structure.
  • It can be used on both desktop and web browsers.
  • It can be used with many different software programs.
  • It is reliable and secure.

Pros and Cons of JavaScript

Pros of JavaScript:

  • JavaScript is lightweight and easy to use, which makes it a good choice for web pages and applications that need to be fast and responsive.
  • JavaScript has a large ecosystem of libraries and tools available, which means you can easily build powerful applications using it.
  • JavaScript is supported by most modern browsers, so you can use it to create websites and apps that are accessible from all devices.

Cons of JavaScript:

  • JavaScript is not as versatile as some other programming languages, so you may find it difficult to work with complex structures or problems.
  • Although JavaScript is supported by most modern browsers, it can sometimes have compatibility issues.
  • Because JavaScript is interpreted rather than compiled, it can take longer than some other languages to run code.

How Does JavaScript work?

JavaScript uses a simple, textual syntax and is supported by many browsers.

When you type JavaScript in your browser, the browser parses the code and asks the computer for instructions. The computer then executes the instructions as they are written, without waiting for you to finish typing them.

JavaScript executes code in two stages: first, the code is interpreted; and second, the interpreter translates it into instructions that the computer can understand.

You can use JavaScript to control how your page appears and behaves. For example, you can create buttons, menus, and other interactivity using JavaScript. You can also use JavaScript to access and change data in your web page.

Why would you use JavaScript?

JavaScript is a versatile programming language that can be used in a variety of applications. Here are three reasons why you might want to use JavaScript:

1. You need to build user interfaces in HTML or CSS. JavaScript allows you to create interactive user interfaces without writing any code.

2. You need to process data on the web. JavaScript lets you easily manipulate and process data from various sources, including databases and JSON feeds.

3. You need to create rich web applications. JavaScript is a powerful language for developing cross-platform applications that look and feel native on both desktop and mobile devices.

Common Mistakes people make when coding with Javascript

If you're new to programming, or just starting out with JavaScript, there are a few things you should know to keep your code clean and tidy. we covers some of the most common mistakes people make when coding in JavaScript.

1. Forgetting to use curly braces {}

One of the most common mistakes beginners make is forgetting to use curly braces {} to enclose their code blocks. Without curly braces, your code will not be properly formatted and can easily become messy. Curly braces are also important for ensuring that your code is executed in the order you wrote it.

2. Using improper variables names

Another common mistake beginner programmers make is using improper variable names. When naming your variables, make sure they are unique and easy to remember. Avoid using weird characters or symbols, and try to choose a name that is descriptive of the contents of the variable. For example, instead of using _count_, use count or num_users_in_usergroup.

3. Not setting proper defaults values

When setting default values for variables, it is important to do so in a way that is clear and concise.


JavaScript is a very helpful programming language that you may want to learn if you're interested in web development, front-end development, or game programming. It is easy to learn and use, so it's great for beginners who are looking to get started with coding right away. If you're new to coding, I recommend checking out some resources like The Complete JavaScript Master Class or Dive Into HTML5 With JavaScript And Node.js. Thanks for reading!

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