What are the differences between Babel polyfills and core-js?

What are the differences between Babel polyfills and core-js?

Babel polyfills and core-js both provide polyfills for JavaScript features, but they serve different purposes. Babel polyfills are designed to support older browsers by transforming modern JavaScript into a version that those browsers can understand. Core-js, on the other hand, is a modular standard library that provides polyfills for ECMAScript features, allowing you to include only the parts you need.

Can you give me examples of features that each one supports?

Sure! Babel polyfills typically include features like Promises and Object.assign, while core-js covers a broader range, including new Array methods, Symbol, and more. Core-js also allows you to import specific polyfills as needed.

Which one should I use for my project?

It depends on your project's requirements. If you need a lightweight solution and only specific features, core-js is a great choice. If you're using Babel for transpilation and want comprehensive support for older browsers, Babel polyfills might be more suitable.

Are there any performance considerations I should be aware of?

Yes, using too many polyfills can increase your bundle size and affect performance. Core-js allows for more granular control, so you can include only what you need, which can help optimize performance.