What are the best practices for using polyfills in React?

What are the best practices for using polyfills in React?

When using polyfills in React, it's best to load them conditionally based on the browser's support. This minimizes the impact on performance.

Can you give me an example of a polyfill I should use?

A common polyfill is for Promise. You can use core-js or babel-polyfill to ensure compatibility with older browsers.

How do I conditionally load polyfills?

You can use feature detection libraries like Modernizr or check for specific features in your code before loading the polyfill.

Are there any downsides to using polyfills?

Yes, polyfills can increase your bundle size and may introduce performance overhead, so use them judiciously.