What Can You Do with JavaScript?

  • 9 mins read

What Can You Do with JavaScript?

JavaScript is a programming language that has taken the world of Web Development by storm. Whether you’re a seasoned developer or starting, chances are you’ve heard of JavaScript. But what can you do with JavaScript? And what tasks might it not be well-suited for?

This article will explore the many answers to questions like what can you do with JavaScript, from building interactive websites and web applications to creating games and automating tasks. We’ll also discuss any limitations or challenges you may encounter when working with the language.

So, if you’re wondering what JavaScript is and what it can do for you, read on! We’ll dive into all the exciting possibilities this universal language offers.

What’s JavaScript?

JavaScript is a programming language commonly used to build interactive elements on websites. It’s a universal language for many tasks, including building web applications, creating games, and automating tasks.

Have you ever wondered how JavaScript code gets executed by your browser? It’s all thanks to JavaScript engines! These engines are responsible for converting your JavaScript code into instructions that the computer can understand and execute.

But how does this process work? When you visit a website that uses JavaScript, the browser downloads the JavaScript code and passes it to the JavaScript engine. 

The engine then uses a process called Just-In-Time (JIT) compilation to compile and optimize the code at runtime. 

You might wonder why JavaScript doesn’t just pre-compile the code like other programming languages. Well, the JIT compilation has its pros and cons. 

On the plus side, it allows developers to prototype quickly and iterates on their code, which can be helpful during the development process. On the downside, it can lead to slower startup times, especially for larger and more complex programs.

What can you do with javascript?

You can do anything with javascript. Here is a list of a few things you can do using Javascript.

Web development: 

Web development with JavaScript involves using the JavaScript programming language to build and maintain websites. JavaScript is commonly used to create interactive website elements, such as drop-down menus, form validation, and image sliders. 

It can also be used to build web applications, such as social media platforms and e-commerce stores. JavaScript is a versatile language that can be used on both the front-end and back-end of a website, making it a popular choice for web developers.

Mobile App Development:

JavaScript frameworks like React Native and NativeScript make it easier to build native apps with the language. These frameworks are popular because they allow developers to create apps that work on both iOS and Android. Using JavaScript for mobile app development can be a fast and easy way to build apps. It also allows developers to reuse code and build apps that run on multiple platforms.

Game Development:

Game Development with JavaScript is a popular choice for many developers, as it allows for the creation of games that can be run on a wide range of devices, including desktop computers, mobile devices, and web browsers. Several frameworks are available for game development with JavaScript, such as Phaser, PixiJS, and Babylon.js. These frameworks provide tools and libraries to help developers build games more easily and efficiently. 

These frameworks can create 2D and 3D games and offer a range of features such as sprite animation, physics simulation, and collision detection. With the right tools and resources, game development with JavaScript can be a fun and rewarding experience.

Data visualization and graphics

Data visualization and graphics with JavaScript can be a powerful tool for communicating information and ideas. Several frameworks are available that make creating visually appealing and interactive graphics easier. Some popular ones include D3.js, Chart.js, and Highcharts.

These frameworks provide a variety of chart types, such as bar charts, line charts, and pie charts, as well as more specialized visualizations like scatterplots and heatmaps. With the right framework and some coding knowledge, you can create dynamic and engaging graphics that help to illustrate your data in a meaningful way.

Automation of tasks: 

Task automation with JavaScript involves using the language to write scripts that can perform various tasks automatically. These tasks can range from simple ones like renaming files in a folder to more complex ones like scraping data from websites or automating the filling out of online forms. 

There are various JavaScript frameworks available that can make it easier to automate tasks. Some popular ones include Puppeteer, great for automating tasks in a web browser, and Node-RED, a visual programming tool that allows you to create automation using a drag-and-drop interface easily.

What You Can Not Do With JavaScript:

While JavaScript is a versatile and widely-used programming language, it’s not perfect for every task. Here are a few things that JavaScript may not be well-suited for:

Low-level system programming tasks: 

If you need to do kernel development or write device drivers, you’ll probably want to use a lower-level language like C or C++. These languages are closer to the hardware and provide more control over the system, but they can be more challenging to work with.

Highly concurrent tasks: 

JavaScript is single-threaded, which means it can only execute one task simultaneously. If you need to do tasks that require multiple threads of execution, consider a language like Java or Go, which are designed for concurrent programming.

Heavy scientific computing or machine learning tasks: 

JavaScript may not have the necessary performance or libraries for jobs that require heavy computation or machine learning. In these cases, consider using a language like Python or R, which have a rich ecosystem of scientific computing and machine learning libraries.


While JavaScript has improved in performance in recent years, there are many better choices for tasks requiring computation or running at high speeds. For example, if you’re building a real-time application that needs to process a large amount of data quickly, consider using a language like C++ or Rust.

Static typing: 

JavaScript is a dynamically-typed language, meaning the variable type is determined at runtime. It makes writing code more straightforward but can also make it harder to catch errors and lead to slower performance. If you prefer the benefits of static typing, consider a language like Java or C#.

Lack of support for certain features: 

JavaScript may not have built-in support for specific features available in other languages. 

For example, it does not support static class variables or properties and does not have a native way to implement inheritance. If you need these features, consider using a language like Java or C#.

Limited support for specific platforms: 

While JavaScript can be used for a wide range of tasks, it may not be available or fully supported on some platforms. For example, if you want to build a native app for a specific operating system, you may need to use a different programming language.

That said, JavaScript has come a long way in recent years and has improved in many areas. 

It’s still an excellent language for web development, mobile app development, and many other tasks. Just be aware of its limitations and consider using a different language if you need to do jobs outside JavaScript’s capabilities.

Interesting facts about javascript

Here are some quick, exciting js facts that you probably didn’t know:

It was created in just ten days:

Netscape engineer Brendan Eich created JavaScript in 1995. Eich was tasked with creating a scripting language that could be used to add interactive elements to web pages. He was able to complete the first iteration of the language in just ten days.

It was initially called LiveScript: 

When it was first released, JavaScript was called LiveScript. It was later renamed to JavaScript to capitalize on the popularity of Java, a hot programming language at the time.

It is the most popular programming language:

According to the 2020 Stack Overflow Developer Survey, JavaScript is the most popular programming language, with more than 70% of developers saying they use it.

JavaScript has a quirky sense of humor: 

The JavaScript creators included several Easter eggs and jokes in the language. For example, the NaN (Not a Number) value is a special value representing an operation’s result that cannot be defined as a number. 

If you try to divide NaN by itself, the result will be NaN. But if you try to determine if NaN is equal to itself using the == operator, the result will be false. This is known as the “NaN problem” and is a classic example of JavaScript’s quirky sense of humor.

JavaScript has a weird syntax: 

JavaScript has a syntax that is unique compared to other programming languages. For example, it uses curly braces to denote blocks of code. And it has a function keyword used to define functions. These features can take some getting used to, but they’re part of making JavaScript a flexible and powerful language.

Type Coercion:

JavaScript has a feature called “coercion,” which allows it to automatically convert values from one type to another. This can be helpful, but it can also lead to confusing bugs if you’re not careful. Some people joke that JavaScript will “coerce” you into thinking you understand what’s going on, only to reveal its true intentions later.

Undefined Value:

In JavaScript, the “undefined” value represents the absence of a value, but it is often used to represent the value “not yet defined.” This has led to many jokes about JavaScript developers constantly checking if things are “defined.”

What Can You Do With JavaScript: Final Thoughts

Now that you know what you can and can’t do with JavaScript, you’re ready to jump in and start learning. If you want to build websites, create animations and effects, and add interactivity to your project, learning JavaScript is the way to go.

Or, maybe you realize JavaScript is not the language for you. A language like C# or Java will offer better results if you require low-level programming capabilities or your apps require the fastest performance. Additionally, if you want another syntactically simple language to try out, Python makes an excellent choice for many projects.

Wondering if JavaScript is for you? Drop a comment below with any questions or ideas!