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What is JavaScript, What Does JS Do?

JavaScript, the most popular programming language, enables the development of interactive and dynamic web pages. Details regarding JS, which can perform clicking, filtering, searching, form validation, animation, and data operations, are in this article!

What is JavaScript, What Does JS Do?
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1.

What Does JavaScript Mean?

It is possible to develop interactive and dynamic web pages with JavaScript, the most popular programming language in the programming world. JavaScript JS, one of the most widely used programming languages by software developers, adds interaction and dynamism to websites. Detailed answers to the question what is JavaScript and what does it do are with you in the rest of our article!

JavaScript is a scripting/programming language used to create interactive behaviors on web pages. The JavaScript language enables web pages to transition from a static structure to a dynamic one and interact with the user. This programming language, which can perform functions such as clicking, form validation, animation, and data processing, is a versatile language. Not limited to web development, this language also offers a strong infrastructure for developing mobile applications, games, and desktop software.

What Does JavaScript Mean?
2.

What is JavaScript Used For?

Just as the question what does JavaScript mean is common, for which business processes and purposes this technology is used is also a matter of curiosity. JavaScript is used to add interaction, speed, and dynamism to digital products, primarily websites and web applications. With JavaScript, which plays an important role in making web pages more lively and interactive, ideas in many areas ranging from simple functions to complex web applications can be easily realized. Let's take a closer look at what can be done with JavaScript!

Making Websites Interactive

Making websites dynamic and interactive is one of the most fundamental functions of JavaScript. Thanks to this feature, operations such as button clicking processes, drop-down menus, sliders, pop-ups, and form validation (empty field, email check) can be easily performed with JS. Click to optimize your business processes with our GlassHouse Cloud services, hosted entirely in Turkey and compliant with legislation.

Performing Operations Without Refreshing the Page

Thanks to its asynchronous working structure (AJAX/Fetch API), only the relevant data is fetched from the server and updated in the interface without the need to reload the entire page. Thus, receiving and sending data from the user; live searching, filtering, and notification and alert systems (AJAX) occur much faster. For example; when the “Add to Cart” button is pressed while shopping on an e-commerce site:
• The product is added to the cart
• The cart count at the top right increases
• The page stays in the same place
In summary, JavaScript sends a request to the server in the background and updates only the cart module with the incoming response.

Web Application Development

It is possible to prepare JavaScript projects by developing web applications. JavaScript is the brain of the web application. How the application responds to user interactions (Event Handling) is managed by JavaScript. It manages user interactions such as button clicks, filtering, and searching; processes data such as checking entered form data and performing calculations, and reflects them on the screen. It also manages the data flow between the client and the server; thanks to modern frameworks like Angular, React, and Vue, it allows for the development of scalable enterprise applications. Use the market's leading data redundancy and business continuity portfolio with local support and expertise. Click to learn more about GlassHouse hardware and software solutions!

Mobile Application Development

Using technologies such as React Native and Ionic with JavaScript, it is possible to develop both iOS and Android applications over a single code base.

Using on the Server (Backend) Side

JavaScript can be used in API development. The API is the bridge between the frontend and the backend. Thanks to runtime environments like Node.js, the JavaScript backend handles requests such as “Register user”, “Fetch order”, or “Check payment status”. With server-side JavaScript, database queries and transactions are performed securely. For example; a user record is added, orders are listed, data is updated or deleted. Additionally, authentication and authorization management is performed, business rules are managed, and real-time transactions and integration with external services can also be done with the JavaScript backend.

Games and Visual Applications

It is also possible to develop games and visual applications with JavaScript. For example, browser-based games and visual applications can be developed using HTML5 Canvas and WebGL technologies with JavaScript. In browser games such as puzzle games, platform games, card, and logic games, JavaScript controls character movements, while rules such as score calculations and Collision Detection are processed with JavaScript. In visual and animation applications, JavaScript is used to control CSS triggers and ensure Timing and flow management. Additionally, charts, maps, and dashboards are created with JavaScript.

Did You Know?
JavaScript is used in 95% of the more than 1.6 billion websites on the internet.

3.

What are the Advantages of JavaScript?

JavaScript's advantages make it one of the most common and indispensable programming languages of the web world. Here are the prominent JavaScript features and advantages:

  • Since JavaScript is a Client-Side language, it runs natively on the browser; no additional compiler or plugin is required for enabling JavaScript. All modern browsers support it; it is effortless for the user.
  • It is fast; operations happen instantly, it works without refreshing the page, and significantly increases user experience.
  • It improves user experience thanks to interactive interfaces, live feedback, and fluid animations.
  • It can be used in both frontend and backend.
  • Thousands of libraries and frameworks, along with constantly updated resources, ensure that JavaScript has a vast ecosystem.
  • It is relatively easy to learn with its readable syntax and ability to yield quick results.
  • It is powerful in real-time applications.
  • It is platform-independent as it can be used for web, mobile, and desktop.
  • It provides SEO and conversion advantages as it offers faster pages and interactive content.
4.

Differences Between JavaScript, HTML, CSS, Python, and Java

Technology Type What Does It Do? Where Does It Run? Fundamental Difference from JavaScript
JavaScript Programming language Interaction, processing, and business logic Browser & Server (Node.js) Manages behavior and dynamic operations
HTML Markup language Creates the structure of the page Browser Does not perform logical operations, only provides structure
CSS Style language Design and appearance Browser Does not perform operations, only arranges visuals
Python Programming language Backend, data analysis, artificial intelligence Server, desktop Does not run natively in the browser
Java Programming language Enterprise and large-scale systems Server, desktop Requires compilation, has a stricter structure

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