https://github.com/vweevers/catering

Simple utility to allow your module to be consumed with a callback or promise.
https://github.com/vweevers/catering

callback nodejs npm-package promise

Last synced: about 1 year ago
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Simple utility to allow your module to be consumed with a callback or promise.

• Host: GitHub
• URL: https://github.com/vweevers/catering
• Owner: vweevers
• License: mit
• Created: 2018-09-01T08:44:33.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2023-11-01T07:42:44.000Z (over 2 years ago)
• Last Synced: 2025-04-30T06:44:28.715Z (about 1 year ago)
• Topics: callback, nodejs, npm-package, promise
• Language: JavaScript
• Homepage:
• Size: 20.5 KB
• Stars: 4
• Watchers: 1
• Forks: 2
• Open Issues: 2
• Metadata Files:
  • Readme: readme.md
  • License: LICENSE

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README

          
# catering

**Cater to callback and promise crowds.**  

Simple utility to allow your module to be consumed with a callback or promise. For Node.js and browsers.

[![npm status](https://img.shields.io/npm/v/catering.svg)](https://www.npmjs.com/package/catering)

[![Node version](https://img.shields.io/node/v/catering.svg)](https://www.npmjs.com/package/catering)

[![Test](https://img.shields.io/github/workflow/status/vweevers/catering/Test?label=test)](https://github.com/vweevers/catering/actions/workflows/test.yml)

[![Standard](https://img.shields.io/badge/standard-informational?logo=javascript&logoColor=fff)](https://standardjs.com)

## Menu

If your module internally uses callbacks:

```js

const { fromCallback } = require('catering')

const kPromise = Symbol('promise')

module.exports = function (callback) {

  callback = fromCallback(callback, kPromise)

  queueMicrotask(() => callback(null, 'example'))

  return callback[kPromise]

}

```

If your module internally uses promises:

```js

const { fromPromise } = require('catering')

module.exports = function (callback) {

  return fromPromise(Promise.resolve('example'), callback)

}

```

Either way your module can now be consumed in two ways:

```js

example((err, result) => {})

const result = await example()

```

When converting from a promise to a callback, `fromPromise` calls the callback in a next tick to escape the promise chain and not let it steal your beautiful errors.

## Install

With [npm](https://npmjs.org) do:

```

npm install catering

```

## License

[MIT](LICENSE) © 2018-present Vincent Weevers. Originally extracted from [`levelup`](https://github.com/Level/levelup/blob/37e0270c8c29d5086904e29e247e918dddcce6e2/lib/promisify.js).