ERR_UNKNOWN_FILE_EXTENSION running a basic ts file?

Not sure what I’m doing wrong but…

node -r esbuild-runner/register helloworld.ts 
TypeError [ERR_UNKNOWN_FILE_EXTENSION]: Unknown file extension ".ts" for /Users/cjr/dev/packages/api/helloworld.ts
    at new NodeError (node:internal/errors:363:5)
    at Loader.defaultGetFormat [as _getFormat] (node:internal/modules/esm/get_format:71:15)
    at Loader.getFormat (node:internal/modules/esm/loader:105:42)
    at Loader.getModuleJob (node:internal/modules/esm/loader:243:31)
    at Loader.import (node:internal/modules/esm/loader:177:17)
    at Object.loadESM (node:internal/process/esm_loader:68:5)

helloworld.ts:

console.log("HELLO WORLD LITERALLY!");
export default {}

node -v
> v16.3.0

[revmischa]

I’m getting ERR_UNKNOWN_FILE_EXTENSION as well using esr in my ESM project, using NPM.

[codetheweb]

https://github.com/antfu/esno seems to work with ES modules.