https://github.com/akheron/typera

Type-safe routes for Express and Koa
https://github.com/akheron/typera

api express koa rest route-handler routing typescript web

Last synced: 1 day ago
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Type-safe routes for Express and Koa

• Host: GitHub
• URL: https://github.com/akheron/typera
• Owner: akheron
• License: mit
• Created: 2019-05-23T11:14:49.000Z (over 5 years ago)
• Default Branch: main
• Last Pushed: 2024-12-04T20:36:57.000Z (18 days ago)
• Last Synced: 2024-12-14T10:03:48.879Z (8 days ago)
• Topics: api, express, koa, rest, route-handler, routing, typescript, web
• Language: TypeScript
• Homepage:
• Size: 4.56 MB
• Stars: 177
• Watchers: 4
• Forks: 14
• Open Issues: 14
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.old.md
  • License: LICENSE

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README

        
# typera - Type-safe routes

[![Build](https://github.com/akheron/typera/actions/workflows/tests.yml/badge.svg?branch=main)](https://github.com/akheron/typera/actions/workflows/tests.yml)

Typera helps you build backends in a type-safe manner by leveraging [io-ts] and

some TypeScript type inference magic. It works with both [Express] and [Koa].

**Upgrading to version 2?** See the

[upgrading instructions](https://akheron.github.io/typera/upgrading).

Features of typera in a nutshell:

- A purer approach to building your apps: Each route handler is an async

  function that takes a request and returns a response. Mutable `req` or `res`

  objects? Never again!

- Automatically parses request inputs like route params, query params, headers

  and request body into typed values.

- Infer the types of responses (status code, body, headers), allow type checking

  them according to your expectations.

- Middleware are fully typed. This means that you no longer have to guess what's

  available in `req`, or whether a middleware short-circuits and returns a

  response. Instead, everything is type checked!

- It's straightforward to start adding fully typed routes to an existing Express

  or Koa app. Old routes can be migrated gradually.

- Built-in support for automatically generating an OpenAPI definition from your

  app with [typera-openapi](https://github.com/akheron/typera-openapi).

Typera is a really thin layer on top of Express or Koa. Most of its code is

TypeScript typings, and the actual runtime stuff is minimal.

See the [documentation](https://akheron.github.io/typera) for tutorial,

examples, API reference and more!

## Development

Run `yarn` to install dependencies.

### Running the test suite

Run `yarn test`.

### Documentation

You need Python 3 to build the docs.

```

python3 -m venv venv

./venv/bin/pip install mkdocs-material

```

Run a live reloading server for the documentation:

```

./venv/bin/mkdocs serve

```

Open http://localhost:8000/ in the browser.

## Releasing

```

$ yarn lerna version 

$ yarn lerna publish from-git

```

Open https://github.com/akheron/typera/releases, edit the draft release, select

the newest version tag, adjust the description as needed.

[io-ts]: https://github.com/gcanti/io-ts

[express]: https://expressjs.com/

[koa]: https://koajs.com/