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Plugin Guide ​

In this chapter, we will create a simple plugin.

Middleware Plugin ​

You can apply middlewares or custom handlers using plugin.server.

ts
export function myPlugin() {
  return {
    name: 'my-plugin',

    server(server) {
      server.use((req, res, next) => {
        next();
      });
    },
  };
}

Transform ​

You can transform files using plugin.transform.

WARNING

Files that are converted by default (such as typescript, javascript) will not be called.

plugin.transform will return routes.

Concept of Routes ​

  • file: path (such as /, /about, /foo/bar)

  • m: module

ts
return {
  m: {
    get(req, res) {
      res.end('get');
    },
    post(req, res) {
      res.end('post');
    },
  },
};
  • modulePath: built file directory

build feature requires modulePath.
If you don't want to support build feature, you don't have to provide this value.

  • type: module or html

Transform Example ​

ts
import { parse } from 'path';

export function myPlugin() {
  return {
    name: 'my-plugin',

    transform(id, code) {
      return {
        file: parse(id).name,
        m: {
          get(req, res) {
            res.end('Hello World!');
          },
        },
        modulePath: '',
        type: 'module', // html or module
      };
    },
  };
}