Website development work is often divided into two classes: front-end and back-end. While both are essential for developing a website, they have different characteristics and use different technologies.

The purpose of front-end development is to provide content and interactive features to the user of the website. Front-end development, like web design, involves optimizing the user interface of the website. However, web design focuses more on aesthetics and usage but less on the actual implementation.

Front-end development uses HTML for specifying web page content. HTML is a markup language that contains content and describes what the content is. For the actual visual layout and appearance of the website, CSS is the main technology used. CSS identifies content from HTML and makes it look the way the developer and designer want it to appear.

For the interactive component of a website, the main front-end language is JavaScript. JavaScript responds to events that occur when using the website and can make changes to content and appearance during usage.

Different libraries and frameworks, such as jQuery, React, and AngularJS, enhance programming with JavaScript. These technologies simplify and speed up developing interactive JavaScript website components.

The components of front-end web development come together to provide the user experience. Fonts, pictures, layout, controls such as drop-down boxes, and interactive forms are all controlled by the front-end technologies.

The front-end interfaces with the back-end, which consists of servers, databases, and server-side programming languages such as PHP, Python, and Perl. This combination makes a website or web application fully functional and usable.