What are Babel polyfills and how do they affect browser support?

What are Babel polyfills and how do they affect browser support?

Babel polyfills are scripts that provide support for newer JavaScript features in older browsers. They help ensure compatibility.

Can you give me an example of a polyfill?

Sure! A common example is the Promise polyfill, which allows older browsers that don't support Promises to use them.

How do I include Babel polyfills in my project?

You can include Babel polyfills by installing the @babel/polyfill package and importing it at the top of your JavaScript files.

Are there any performance concerns with using polyfills?

Yes, using polyfills can increase the size of your JavaScript bundle, which may affect load times. It's best to use them selectively.

What browsers are supported by Babel polyfills?

Babel polyfills aim to support all browsers that are still in use, but you can configure the specific browsers you want to target in your Babel settings.