Frontend Application Development, also known as Frontend Development or Frontend Engineering, refers to the development of the user-facing part of a web application. It involves building the client-side of a web application, which is the part of the application that the user interacts with directly through their web browser.
Frontend developers use a combination of programming languages such as HTML, CSS, and JavaScript, along with various frontend frameworks and libraries such as React, Angular, Vue.js, or jQuery to create responsive and interactive web applications.