core-js-compat is a utility that helps you determine the core-js features required for your project based on your target environments. It analyzes your code, identifies used ECMAScript features and generates a list of necessary core-js modules for optimal polyfilling. This ensures you only include the polyfills you need, reducing bundle size and improving performance. It's essential for projects seeking compatibility with older browsers and JavaScript engines while minimizing bloat.
The core-js-compat package saw frequent releases in 2019-2021, with peaks in late 2019 and throughout 2021. Release frequency decreased significantly from 2022 to 2025. There were many months with no releases in 2020, 2022, 2024 and 2025. August 2025 has 2 releases.
Core-js-compat downloads saw a surge from February 2024 (18M) reaching over 100M in March 2024 and remained consistently high throughout the year. A notable increase is observed in mid-2025, peaking in June (146M). August 2025's partial data shows a dip to 99M, suggesting potential fluctuation or incomplete data for the month.
