JavaScript Engines

JavaScript engines are specialized programs within web browsers that interpret and execute JavaScript code, enabling web pages to be dynamic and interactive. When a webpage loads, the engine reads the JavaScript files, translates the code into instructions the computer can understand, and runs them quickly. Popular engines include Google’s V8 (Chrome) and Mozilla’s SpiderMonkey (Firefox). These engines optimize performance through techniques like just-in-time compilation, ensuring complex scripts execute efficiently. In essence, JavaScript engines are the core technology that makes interactive and responsive websites possible by processing code seamlessly behind the scenes.