Something like @babel/preset-env

[swc-project]

Something like @babel/preset-env

[fabiosantoscode]

I propose SWC enables every feature by default, and accepts an optional browserlist parameter that will control what browsers are the targets. Things like IE > 6 or > 1%. That can be done in JS easily.

[kdy1]

I thought this is almost done, but determining .swcrc api is quite hard. I want to follow it of babel, but there is a problem.

Invoking browserslist from rust code is not easy. It means that allowing browserslist query to be specified on .swcrc is not a trivial task.

There are some options.

• Invoke browserlist via node executable

It would make swc slow, but the query result can be cached.

• Inject browserslist function while creating a instance of Compiler.

This is hard at the moment. neon-bindings/neon#375 is required.

• Handle browsers query from node

This option requires removing target from .swcrc

I'll go with first option.

[swc-bot]

This closed issue has been automatically locked because it had no new activity for a month. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.