Optional file extension to append to generated re-export specifiers.
Keep the default empty for backwards compatibility with existing
CommonJS consumers; ESM/NodeNext projects can opt into '.js'.
outRoot
outRoot:string
Target root directory where the source files will be written.
Optional file extension to append to generated re-export specifiers. Keep the default empty for backwards compatibility with existing CommonJS consumers; ESM/NodeNext projects can opt into '.js'.