What is a function ?

In Morty, a function is a classic programming language function. The only difference is that the function, depending on the runtime, will have a defined signature.

For example, a JavaScript function for the default Node.js runtime (opens in a new tab) will look like :

exports.handler = async function (req, res) {
  return res.status(200).send(JSON.stringify("My first function !"));
};

Let's analyze the function signature :

req is an Express request (opens in a new tab) object, as the runtime use Express to handle its HTTP server.
res is an Express response (opens in a new tab) object, as the runtime use Express to handle its HTTP server.

Like a classic API, you can use those two objects to retrieve information about your incoming request. Also, you have full control on the response you want to return.

Architecture Runtimes