Except in typescript, where you have to import a file with the .js extension, despite the actual file being .ts: https://github.com/microsoft/TypeScript/issues/

Except in typescript, where you have to import a file with the .js extension, despite the actual file being .ts: https://github.com/microsoft/TypeScript/issues/42151 https://github.com/microsoft/TypeScript/issues/42151, https://github.com/microsoft/TypeScript/issues/49083 https://github.com/microsoft/TypeScript/issues/49083, https://github.com/microsoft/TypeScript/issues/16577 https://github.com/microsoft/TypeScript/issues/16577 This one issue (IMO) is preventing parts of the ecosystem from switching to esm.