Sha256: 7287d41cefa8c790b6a3bd8a802614f93acf2fd0eaca3d2fc7b6fef0c5e2ce47
Contents?: true
Size: 991 Bytes
Versions: 508
Compression:
Stored size: 991 Bytes
Contents
# 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)
```
Version data entries
508 entries across 395 versions & 45 rubygems