BigInt exponentiation `2n ** 63n` transpiled to `Math.pow(2n, 63n)` in CommonJS output

[make-github-pseudonymous-again]

Expected? It is broken on Node v17.9.0.

[rschristian]

Yes, this is correct. Everything but the modern output is ES5 while the exponentiation operator is ES2016.

If you'd like to alter the targets you can do so using a "browserslist" entry in your package.json:

{
  "browserslist": [
    "node >= 7"
  ]
}

If you're only after Node compat (which I'm guessing since you've listed Node version), then this config will work. This operator has been supported since Node v7 (source).

Edit: Forgot, --target node will do this as well without need to alter the browserslist config.

[make-github-pseudonymous-again]

Thanks @rschristian. Is there a way to fix this with --taget web? I was only giving out node version because that's what I use to run microbundle.

[rschristian]

Yep, certainly can! Just edit the browserslist:

// package.json
{
  "browserslist": [
    "last 5 years"
  ]
}

Should do the trick.

[rschristian]

Closing this out as it's hopefully been answered. Let me know if you're still having issues and I can reopen.