Dual ESM/CJS emit with tsc · Issue #54593 · microsoft/TypeScript

#54546 explored one approach of enabling dual ESM/CJS emit for packages with tsc alone. The idea was that instead of determining the module format of .ts files by looking for package.json files in its ancestor directories, we would look for them starting at the directory where that file’s .js output would be emitted (a subdirectory of outDir). That way, two tsconfig files could point to two differ

[efcl]

tscのみでdual packageを実現する方法がない問題について。 importsを使うとpackage.jsonのtypeハックがうまく動かないケースについて