Clarify polyfilling and browserlist usage documentation

Hi,

The docs about supported browsers is not clear.

After reading it i still dont understand the following :

• If the polyfills are not imported, what the browserlist field in package.json is used for ?
• If i need to support ie11 (and Array.includes for example), what do i need to do exactly ?
• Is @babel/preset-env used to automatically require polyfills ?
• Moreover the docs from @babel/preset-env (included with preset react app) indicates to import @babel/polyfill which is now deprecated. react-app-polyfill/stable.js requires the correct package core-js/stable but is browserlist still used using this file ?

Thanks for your help

[M0ns1gn0r]

Can someone answer the questions raised by the topic starter one by one?

[lukejagodzinski]

@petetnt yep I’ve noticed that. But instead of polyfilling everything I’ve just polyfilled features that I needed using core-js and it works. Would assume that when I use browserslists it should automatically polyfill everything that’s needed and also detect what features I’m using and only polyfill them. That would be ideal scenario.