> For the complete documentation index, see [llms.txt](https://bryan-guner.gitbook.io/my-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bryan-guner.gitbook.io/my-docs/redux/repos/examples/real-world/node_modules/call-me-maybe.md).

# call-me-maybe

Let your JS API users either give you a callback or receive a promise.

## Usage

```javascript
var maybe = require("call-me-maybe")

module.exports = function asyncFunc (cb) {
  return maybe(cb, new Promise(function(resolve, reject) {
    // ...
  }))
}
```

## API

### maybe(cb, promise)

If the callback `cb` is truthy, returns `undefined` and will call `cb` when `promise` is settled. The parameters passed to `cb` are standard error-first:

* If `promise` is fulfilled, then it is called with the result of the promise: `cb(null, result)`
* If `promise` is rejected, then it is called with the rejection error: `cb(err)`

If `cb` is falsey, then `promise` is retuned.