I've had success running swc on the output of esbuild, with a swc target of IE11. We do this only for the IE11 build. So at app startup, we check for IE11, an

I've had success running swc on the output of esbuild, with a swc target of IE11. We do this only for the IE11 build. So at app startup, we check for IE11, and then load a polyfill from https://polyfill.io https://polyfill.io, and then the IE11-specific build. The goal is to make it to September, when we have decided we can completely pull the plug on IE.