JavaScript

JavaScript (short: JS) is a scripting language that enables web developers to create interactive websites. It is also required for Progressive Web Apps (PWA). PWAs are not "traditional" apps that need to be downloaded from an app store. They look like an app and function just like one. However, they operate directly on the website - without cumbersome downloads.

Javascript is a scripting language that has become one of the most commonly used languages on the web since its introduction in 1995. It was specifically designed for web development and is now used for creating interactive and responsive web applications, games, and much more. By using Javascript, developers can create dynamic websites that interact with users and respond to user actions.

Today, web development plays a crucial role in many companies and organizations. With the increasing demand for digital products and services, there is also a growing need for developers to create high-quality web applications tailored to user needs. The use of Javascript in web development has become essential as it allows developers to build interactive and responsive web applications that work on various devices and platforms.

In this context, it is important to understand the advantages of Javascript in agile web development to ensure that developers have the necessary skills and knowledge to create high-quality web applications.

Why Web Apps with Javascript?

Web apps are accessed directly through the browser and do not require a separate download from the app store. They can not only look like "real" apps, but are also ideal when content or functionalities need to be available on mobile devices.
Software updates can be carried out in the future without complications. Another bonus: the web app works platform-independent on all devices, which further conserves the project budget.

Modern web apps are created using JavaScript alongside HTML and CSS.

• Interactivity:
  JavaScript enables developers to create interactive and responsive web applications. By using JavaScript, user actions such as clicks or hover effects can be displayed instantly on the webpage without the need for a page reload.
• Scalability:
  JavaScript is scalable and allows developers to build applications in small, modular components. These components can be easily reused and integrated into different applications.
• Flexibility: JavaScript is a flexible language that enables developers to quickly create prototypes and concepts. Due to the many available frameworks and libraries, developers can leverage existing solutions to speed up development.
• Browser Compatibility: JavaScript is one of the most widely used languages on the web and is supported by all major browsers. This means that web applications built with JavaScript can run on all devices and platforms.
• Efficiency: By using JavaScript frameworks like React, Angular, or Vue.js, developers can quickly and efficiently create high-quality web applications. These frameworks offer a range of pre-built components and features that developers can reuse and customize to shorten development time.

01

JavaScript should not be confused with Java. Although the name seems like a shorthand, they are different programming languages.

02

JavaScript is a main component of the World Wide Web (alongside HTML and CSS).

03

To simplify complex programming, there are numerous JS libraries and frameworks. Some examples include: ReactJS, AngularJS, or Vue.js.

Client-side JavaScript vs. Server-side JavaScript

JavaScript can be both – client-side or server-side. Both have their legitimacy and are important, yet the forms differ significantly.

Client-side JavaScript executes the script directly in the users' browsers and is a commonly used form. At the same time, it enables manipulation of browsers and websites. Search engines also sometimes struggle with client-side JS.

Server-side JavaScript runs (as the name suggests) not in the browser, but on the server. An example of a popular server-side framework for JavaScript is Node.js. Search engine crawlers are presented with a fully rendered page when it comes to server-side JS, leading to fewer issues with indexing.