Vue.js (often referred to as Vue) is an open-source JavaScript framework for building user interfaces (UIs) and single-page applications. Created by Evan You in 2014, Vue was designed as a lightweight alternative to more comprehensive frameworks like Angular and React. Vue's core library focuses on the view layer, making it incrementally adoptable and easy to integrate into existing projects. It combines HTML-based template syntax with a component-based architecture, offering a balance between simplicity and versatility.
Vue is known for its approachable nature, building upon standard HTML, CSS, and JavaScript with an intuitive API and extensive documentation. It features a reactive, compiler-optimized rendering system that minimizes the need for manual optimization. Vue's ecosystem includes tools like Vue CLI, Vue Router, and Vuex (now succeeded by Pinia) for state management, providing developers with solutions for projects of varying scales. Vue is steadily growing in popularity, with over 3.3 million live sites built using the framework as of late 2024.