There are third-party maven and gradle integrations and plugins at various stages. And you can also run bazel -s to log the exact commands it is running (basica

There are third-party maven and gradle integrations and plugins at various stages. And you can also run bazel -s to log the exact commands it is running (basically j2cl with annotation processing plus closure-compiler). Though extracting good pairings of j2cl, closure-compiler, gwt and jre-emul libs etc tends to become a pointless chore with j2cl, closure-compiler being updated all the time without documented releases other than timestamps. Last I checked, closure-compiler was at a 2020ish rev in a recent j2cl bazel build checkout only slightly newer than the initial 2019 release, with j2cl apparently focussing on kotlin and also an experimental wasm target requiring wasmgc hence Chrome. It's a pity Google doesn't anymore see value in external input/testing for j2cl and closure-compiler since these are decent projects.