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1# promise-inflight
2
3One promise for multiple requests in flight to avoid async duplication
4
5## USAGE
6
7```javascript
8const inflight = require('promise-inflight')
9
10// some request that does some stuff
11function req(key) {
12 // key is any random string. like a url or filename or whatever.
13 return inflight(key, () => {
14 // this is where you'd fetch the url or whatever
15 return Promise.delay(100)
16 })
17}
18
19// only assigns a single setTimeout
20// when it dings, all thens get called with the same result. (There's only
21// one underlying promise.)
22req('foo').then(…)
23req('foo').then(…)
24req('foo').then(…)
25req('foo').then(…)
26```
27
28## SEE ALSO
29
30* [inflight](https://npmjs.com/package/inflight) - For the callback based function on which this is based.
31
32## STILL NEEDS
33
34Tests!
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