This package has been deprecated

Author message:

This module is not supported, and leaks memory. Do not use it. Check out lru-cache if you want a good and tested way to coalesce async requests by a key value, which is much more comprehensive and powerful.

inflight
DefinitelyTyped icon, indicating that this package has TypeScript declarations provided by the separate @types/inflight package

1.0.6 • Public • Published

inflight

Add callbacks to requests in flight to avoid async duplication

USAGE

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)

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Install

npm i inflight

Weekly Downloads

45,008,754

Version

1.0.6

License

ISC

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  • isaacs