This may be a really dumb question, but: Where does one set the new

bundle.format

option?

actually i have the same doubt

Hey @Michael Clifford, that’s set inside an `sst.Function`’s prop:

// set on all functions
app.setDefaultFunctionProps({
  bundle: {
    format: "esm",
  },
});

Thank you @Frank!

@Michael Clifford It applies to Python as well but it takes different props. https://docs.serverless-stack.com/constructs/Function#functionbundlepythonprops https://docs.serverless-stack.com/constructs/Function#bundle

@Michael Clifford sorry missed ur earlier msg. While the

bundle

option is configurable for both Node.js and Python runtimes, what is being configured is quite runtime specific.

bundle.format

takes either

esm

or

cjs

which gets passed down to

esbuild

, which is used to bundle Node.js functions.