using-compile-to-js-languages.md

Using compile-to-js languages

It's possible to write handler files in a compile-to-js language by simply writing the files in that language and registering a require hook when starting mock-server.

Babel example

• write a .babelrc in the mock-server root:

  // mock-server/.babelrc
  {
    "presets": ["@babel/preset-env"]
  }

  Note: if you already have a .babelrc in your project's root, you can make mock-server use that by simply not writing a .babelrc in the mock-server root.

• write your handler files:

  // mock-server/get.js
  export default function handler(req, res) {
    req.status(200).send("OK");
  }

• install @babel/register and start the server with mock-server --require @babel/register

TypeScript example

• write your handler files:

  // mock-server/get.ts
  import { RequestHandler } from "express";
  
  const handler: RequestHandler = (req, res) => {
    req.status(200).send("OK");
  };
  export default handler;

• install ts-node and start the server with mock-server --require ts-node/register