JavaScript is a versatile, high-level programming language primarily used for web development. It enables dynamic, interactive content in browsers, working alongside HTML and CSS. As a lightweight, interpreted language, JavaScript supports event-driven, functional, and object-oriented programming paradigms. It powers front-end frameworks like React, Angular, and Vue.js, while Node.js extends its capabilities to server-side development. JavaScript uses asynchronous programming with promises, async/await, and event loops for efficient execution. It interacts with the DOM for real-time updates and supports APIs for external data handling. Its vast ecosystem, including libraries and frameworks, makes it essential for modern web and full-stack development.
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