Name	Last modified	Size	Description
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	package.json	2023-06-13 07:16	1.4K	3e510ca test new git [كارل مبارك]
	inflight.js	2016-10-13 03:52	1.3K
	README.md	2014-05-05 03:32	1.0K	d768d73 docs [كارل مبارك]
	LICENSE	2014-05-05 02:57	748

# inflight

Add callbacks to requests in flight to avoid async duplication

## USAGE

```javascript
var inflight = require('inflight')

// some request that does some stuff
function req(key, callback) {
  // key is any random string.  like a url or filename or whatever.
  //
  // will return either a falsey value, indicating that the
  // request for this key is already in flight, or a new callback
  // which when called will call all callbacks passed to inflightk
  // with the same key
  callback = inflight(key, callback)

  // If we got a falsey value back, then there's already a req going
  if (!callback) return

  // this is where you'd fetch the url or whatever
  // callback is also once()-ified, so it can safely be assigned
  // to multiple events etc.  First call wins.
  setTimeout(function() {
    callback(null, key)
  }, 100)
}

// only assigns a single setTimeout
// when it dings, all cbs get called
req('foo', cb1)
req('foo', cb2)
req('foo', cb3)
req('foo', cb4)
```