Should one use both proposals of polyfill-corejs3 and shippedProposals of @babel/preset-env?

[nyngwang]

As title. Here are the differences:

1. From docs of proposals, it says that it will enable all proposals supported by corejs.
2. From docs of shippedProposals it seems that only those proposals supported by targets will be added.

Should these two options be enabled together?

update: From their implementation, it seems that shippedProposals is a stricter condition.

[JLHwung]

They are independent options. shippedProposals refers to language features supported by Babel, such as decorators (if they were shipped in a browser), while corejs.proposals refers to new JavaScript object / methods that you might need a polyfill, such as Array.prototype.toReversed (if they were still stage-3 and shipped in a browser).