Front-end technologies build the visual interface users interact with. The foundation relies on HTML (structure), CSS (styling), and JavaScript (interactivity).
React.js is a free, open-source JavaScript library developed by Meta for building dynamic, fast, and interactive user interfaces (UIs) on the web.
Vue.js (pronounced /vjuː/, like "view") is an open-source, progressive JavaScript framework used for building user interfaces (UIs) and front-end web applications.