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[6a3a178] | 1 | # promise-inflight
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| 2 |
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| 3 | One promise for multiple requests in flight to avoid async duplication
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| 4 |
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| 5 | ## USAGE
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| 6 |
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| 7 | ```javascript
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| 8 | const inflight = require('promise-inflight')
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| 9 |
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| 10 | // some request that does some stuff
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| 11 | function req(key) {
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| 12 | // key is any random string. like a url or filename or whatever.
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| 13 | return inflight(key, () => {
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| 14 | // this is where you'd fetch the url or whatever
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| 15 | return Promise.delay(100)
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| 16 | })
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| 17 | }
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| 18 |
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| 19 | // only assigns a single setTimeout
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| 20 | // when it dings, all thens get called with the same result. (There's only
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| 21 | // one underlying promise.)
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| 22 | req('foo').then(…)
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| 23 | req('foo').then(…)
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| 24 | req('foo').then(…)
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| 25 | req('foo').then(…)
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| 26 | ```
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| 27 |
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| 28 | ## SEE ALSO
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| 29 |
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| 30 | * [inflight](https://npmjs.com/package/inflight) - For the callback based function on which this is based.
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| 31 |
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| 32 | ## STILL NEEDS
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| 33 |
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| 34 | Tests!
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