JavaScript

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JavaScript: The key language for creating interactive and dynamic web applications

In the world of modern web development, JavaScript is an indispensable pillar. This versatile client-side scripting language enables developers to create dynamic content, respond to user behavior, and build responsive interfaces. Thanks to broad browser support, an extensive ecosystem of libraries and frameworks, and a low barrier to entry, JavaScript is the cornerstone of web application development—from simple forms to complex front-end architectures.

Key features of JavaScript

JavaScript is a dynamically typed language, which allows for rapid prototyping and high flexibility in development. Its event-driven paradigm supports reactive and responsive UI behavior. Thanks to a huge number of tools – such as libraries (e.g., jQuery) and frameworks (e.g., React, Vue.js, or Angular) – development becomes more efficient and sustainable. JavaScript runs directly in the browser, but with the help of environments such as Node.js, you can also write server-side code. Support for modules, asynchronous programming (Promises, async/await), and the ability to integrate with other technologies (REST API, WebSocket, GraphQL) make it a powerful tool across the technology stack.

The benefits of JavaScript in practice

JavaScript brings benefits to all levels of development. For frontend developers, it is a tool for creating live user interfaces. For full-stack developers, it allows them to write a unified language on both the client and server (e.g., using Node.js and Express). For companies, JavaScript means faster development, shorter time-to-market, and easier recruitment of developers thanks to the wide availability of know-how. A strong community and support from all major browsers ensure stable development and long-term sustainability of solutions.

Use Cases of JavaScript

JavaScript is the foundation of every interactive web application – from e-shops and online forms to web interfaces for information systems. It is a key technology for SPAs (Single Page Applications), brings live components to CMS systems, and ensures fast response times in e-commerce environments. Thanks to tools such as Electron and React Native, it can also be used outside the web: for desktop and mobile applications. In data visualization (e.g., using D3.js), it enables intuitive display of complex data.

JavaScript is not just a language for animations – it is a strategic tool for modern cross-platform development. Thanks to its flexibility, robust ecosystem, and continuous development, it remains one of the most important pillars of the digital environment.

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Where have we used JavaScript?

Take a look at the examples

LeasePlan

Application And Support For A Call Centre

Simplification has been achieved by integrating several systems into one dashboard, which provides the operator with a comprehensive overview and thus speeds up the resolution of typical situations. The application also now offers statistics and reports. Both versions of the application (desktop and web) use only one code and their user interface is therefore generated in real time.

Pernod Ricard

Sales Modeling Application

We changed the data storage format, refactored and optimized the application code. In addition, we modified the screen sequences and started to modify the appearance. Last but not least, we changed the platform the application was running on to linux.

PSA Group/Emil Frey

Car Sales and Management Software

We created a web application which PSA Group employees can run on their laptop or use a responsive version on their tablets or telephones after they sign in. The original application lacked the necessary information. Since the customer wants to focus more on the sale of used cars, he needs a well-organized application with the current status, technical data, and availability.

Edwards Lifesciences

Health Assessment Questionnaire Application

Doctors use the mobile application instead of printed forms. A new patient’s health card with a unique ID is created in the application for the new patient, who then fills in the entry form on the tablet. In the form, the user answers a set of questions evaluating his lifestyle and other similar parameters. Once the user submits the form, the application connects to the server using the API, so the responses are available for processing immediately. After processing the answers, the application sends the results by e-mail to the attending physician, patient, or possibly the physician of the external office. At the next visit to the doctor, the patient fills in the form again and the results are automatically compared with the previous ones. The results are stored in the application, so there is no need to physically store and search for previously completed forms.