Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in a markup language.

Although most often used to set the visual style of web pages and user interfaces written in HTML and XHTML, the language can be applied to any XML document, including plain XML, SVG and XUL, and is applicable to rendering in speech, or on other media.

Along with HTML and JavaScript, CSS is a cornerstone technology used by most websites to create visually engaging webpages, user interfaces for web applications, and user interfaces for many mobile applications.

JavaScript is a high-level, dynamic, untyped, and interpreted programming language.

It has been standardized in the ECMAScript language specification.

Alongside HTML and CSS, JavaScript is one of the three core technologies of World Wide Web content production; the majority of websites employ it, and all modern Web browsers support it without the need for plug-ins.

JavaScript is prototype-based with first-class functions, making it a multi-paradigm language, supporting object-oriented, imperative, and functional programming styles.

It has an API for working with text, arrays, dates and regular expressions, but does not include any I/O, such as networking, storage, or graphics facilities, relying for these upon the host environment in which it is embedded.

Vue.js (commonly referred to as Vue; pronounced, like view) is an open-source progressive JavaScript framework for building user interfaces.

Integration into projects that use other JavaScript libraries is made easy with Vue because it is designed to be incrementally adoptable.

Also, Vue is a capable web application framework that is able to power advanced single-page applications.

Front-end web development, also known as client-side development is the practice of producing HTML, CSS and JavaScript for a website or Web Application so that a user can see and interact with them directly.

The challenge associated with front end development is that the tools and techniques used to create the front end of a website change constantly and so the developer needs to constantly be aware of how the field is developing.

ECMAScript (or ES).

is a trademarked scripting-language specification standardized by the European Computer Manufacturers Association in ECMA-262 and ISO/IEC 16262.

It was created to standardize JavaScript, so as to foster multiple independent implementations.

JavaScript has remained the best-known implementation of ECMAScript since the standard was first published, with other well-known other implementations including JScript and ActionScript.

Coders commonly use ECMAScript for client-side scripting on the World Wide Web, and it is increasingly being used for writing server applications and services using Node.js.