Version Details and Security Vulnerabilities

Core-js is a JavaScript standard library providing polyfills for modern ECMAScript features, ensuring compatibility across different environments. Version 2.2.1, released on March 18, 2016, follows closely the previous stable version 2.2.0, released just three days prior on March 15, reflecting a rapid iteration cycle and continuous improvement. Both versions share identical development dependencies, including tools like Webpack for bundling, ESLint for code linting, and Karma for testing across various browsers. This indicates a consistent development and testing environment. The core functionality, license, and repository remain unchanged, suggesting the update likely addresses bug fixes, minor enhancements, or performance improvements rather than significant feature additions.

For developers using core-js, this means a reliable library with actively maintained compatibility shims. The quick turnaround between versions suggests a commitment to addressing issues promptly. While the specific changes between 2.2.0 and 2.2.1 aren't explicitly detailed in the provided data, upgrading from 2.2.0 to 2.2.1 would likely provide a more robust and refined experience, especially for advanced JavaScript features or environments with varying levels of ES6+ support. Developers should always consult the official changelog or release notes for detailed information on specific improvements included in the update to ensure alignment with their project's needs and dependencies.