What are Babel polyfills and how do I use them?

What are Babel polyfills and how do I use them?

Babel polyfills are pieces of code that provide modern JavaScript features in older environments. You can use them by including the appropriate polyfill in your project.

Can you give me an example of a polyfill?

Sure! A common polyfill is for the Promise object. If a browser doesn't support it, you can include a polyfill like 'babel-polyfill' to add that functionality.

How do I install Babel polyfills in my project?

You can install Babel polyfills using npm. Just run npm install @babel/polyfill and then import it in your entry file.

Are there any downsides to using polyfills?

Yes, using polyfills can increase your bundle size and may lead to performance issues if not managed properly. It's best to use them only when necessary.