JavaScriptCore
JavaScriptCore is an open-source JavaScript engine developed by Apple, primarily used to execute JavaScript code in WebKit-based browsers like Safari and in native applications on Apple platforms (iOS, macOS, tvOS, watchOS). It provides a high-performance, standards-compliant implementation of the ECMAScript specification, enabling JavaScript execution outside of web browsers, such as in server-side environments or embedded systems. The engine includes features like just-in-time (JIT) compilation and garbage collection to optimize performance.
Developers should learn JavaScriptCore when building applications for Apple ecosystems that require JavaScript execution, such as hybrid mobile apps using frameworks like React Native or Cordova, or when embedding JavaScript in native macOS/iOS apps for scripting or plugin systems. It is also useful for server-side JavaScript projects on Apple platforms or for contributing to WebKit development, as it offers deep integration with Apple's technologies and performance optimizations tailored to their hardware.