write a plugin to force class in es5

[farfromrefug]

In Nativescript we currently use a tsc transformer to detect classes with a special @NativeClass decorator and enforce that that class be in es5 syntax with __extends. In the process the @NativeClass decorator is removed.

We would like to support swc so for that we need that transformer ported to swc. At first i was thinking we should wait for tsc transformer to be supported but i know i am thinking it might be better to write a custom plugin for our purpose to do this.

Do you think that would be feasible? Is there any code exemple / reference i could get to get started on this? I see 3 parts to this:

• detect class decorator
• enforce class to be transpiled in es5
• remove decorator

[kwonoj]

Basic idea is borrowing swc/core's exsting transform and let it run via plugins regardless of swc config target setting. This is essentially swc-project/swc#4826, while there maybe some core transform won't work in plugin context which may need to be fixed. There isn't a straightforward code examples afailk.