JavaScript Basic Concept You Need to Know
Published at February 08, 2023

Isn't it cool to use a single language for client and server applications? JavaScript powers millions of web pages, and it’s still popular.

On the one hand, HTML and CSS provide styling for web pages, but it is the magic of JavaScript that brings your web pages to life. Furthermore, it’s also suitable for server-side applications.

JavaScript offers a single language for web development that serves both purposes, which is why many tech industries seek JavaScript developers.

According to the 2019 Stack Overflow Developer Survey, JavaScript is the most popular programming language. The language is used by 95% of all websites. Whether it's a small startup or a large corporation, the majority of them are working on some kind of website or app that requires a good understanding of this language.

What is JavaScript?

JavaScript is a programming language usually used to build interactive web applications. It is one of the three core technologies used in web development alongside HTML and CSS.

Programmers use JavaScript to give websites interaction and dynamic behaviour. This enables users to manage the website using clicks, scrolls, or keyboard inputs. JavaScripts may be used for many different things and to build interactive web pages, like validating web form inputs and making animated graphics for games.

How does JavaScript work?

JavaScript is a client-side scripting language used to create dynamic web pages and interactive websites. It can be found in almost any modern web browser and is supported by all major web browsers, including V8 Google Chrome.

According to Javatpoint, here are some of the example how JavaScript works:


It displayed an alert message to the user in the preceding programme by using the “alert()” method, which is a JavaScript predefined method. It also used the “console.log();” method, passing “JavaScript” as the String, and “JavaScript” in the console in inspect mode, as shown in the output below.


JavaScript allows developers to build interactive and dynamic applications that run entirely on the client’s machine. This makes it an incredibly powerful tool for developing responsive, user-friendly websites.

Further, JavaScript works by executing code when certain events occur, such as when a page is loaded or when a button is clicked. The code then runs on the user's computer, giving the developer complete control over how the application behaves without having to rely on server-side processing.

What are the uses of JavaScript?

JavaScript enables users to create modern web applications that allow direct user interaction without repeatedly refreshing the page. The DOM API frequently uses JavaScript to modify HTML and CSS to update a user interface dynamically. Most of its applications are web-based.

What is JavaScript used for? According to Javatpoint, here are the representing of JavaScript:

1. Web Applications

With JavaScript, programmers may easily add new features to already-existing websites or build original applications from scratch. Enabling highly responsive interactions with the website gives users more freedom over how they interact with the platform.

Complex logic can also be applied by developers to process data on the client side, reducing server load times and enhancing application performance.

Overall, JavaScript is an excellent option for building robust web applications because of its flexibility, scalability, security, and performance. For example, Google Maps, where the users can click and drag the mouse.

2. Web Development

JavaScript allows programmers to create interactive forms, automate repetitive tasks, and embed multimedia content on their websites. Additionally, JavaScript has several libraries that enable programmers to quickly access various functions without having to write original code. This makes it a useful tool for both inexperienced and seasoned developers.

With its robust features and diverse applications, JavaScript is becoming a must for creating modern websites. Anyone interested in learning how to use this language to develop dynamic websites can use it because it is simple to use.

3. Mobile Applications

JavaScript allows us to take this a step further and develop an application for iOS and Android users who want to use their smartphones for purposes other than online browsing.

A popular framework called React Native enables programmers to write JavaScript code and then compile it into native code that can run on both iOS and Android devices.

React Native gives developers additional freedom to design mobile applications that run on different operating systems without having to completely rewrite their code. This facilitates the rapid development of applications that offer a consistent user experience independent of the device used.

4. Games

Game development can also be done with JavaScript. Using physics engines like PhysicsJS and rendering libraries like Pixi.js, developers can create 2D or 3D simulated worlds for players to explore. WebGL is frequently used in 3D games combined with JavaScript to generate graphics.

Because of the popularity of JavaScript, there are numerous resources available for those interested in getting into game development. Numerous online tutorials and guides provide step-by-step instructions for using JavaScript libraries such as PhysicsJS and Pixi.js.

5. Presentations

Creating a presentation as a website is an appealing alternative to conventional PowerPoint slides, and JavaScript can help with the process. It is possible to create dynamic presentations that are interactive, engaging, and one-of-a-kind using libraries such as Reveal.js and BespokeJS.

Reveal.js is a popular tool for creating JavaScript-based presentations, and it allows users to create stylish interactive slideshows in HTML5 easily. It includes features such as speaker notes and slide overviews, as well as multiple themes for customising the look and feel of your presentation.

6. Server Applications

A large number of web applications in the modern web development world are server-side. This implies that they need more than just client-side code to function properly; they also require backend code running on servers.

To accomplish this, developers frequently rely on JavaScript to generate content and handle HTTP requests. Node.js is a popular framework that is used.

7. Web Servers

Node.js is a popular and powerful server-side scripting language for building a web server. It is event-driven, which means it does not wait for the previous call's response, allowing for fast and efficient data processing. Creating a web server with Node's built-in HTTP module is as simple as writing a few lines of code.

Wrapping Up

JavaScript is an essential language for web development, and its growing ecosystem provides the tools and resources to make the development process easier. With the increasing demand for web-based applications, JavaScript will be a language that developers of all levels must learn.

It is a powerful language that helps bring web applications to life and allows developers to create unique user experiences. As an ever-evolving language, JavaScript provides developers with more opportunities to create innovative websites and apps that are well-suited for the digital age.

Check out our services to learn more about how VirtualSpirit can help your business grow with our qualified software developers.

Check Other Related Posts
Explore smart real estate with energy-efficient apps for sustainable living.
December 26, 2023
Explore how AI-driven healthcare chatbots revolutionize patient engagement.
December 19, 2023
Discover the future of real estate apps seamlessly integrating with smart homes via IoT.
December 12, 2023
View All Insights