forked from zhurui/management
35 lines
782 B
Markdown
35 lines
782 B
Markdown
|
# promise-inflight
|
||
|
|
|
||
|
|
One promise for multiple requests in flight to avoid async duplication
|
||
|
|
|
||
|
|
## USAGE
|
||
|
|
|
||
|
|
```javascript
|
||
|
|
const inflight = require('promise-inflight')
|
||
|
|
|
||
|
|
// some request that does some stuff
|
||
|
|
function req(key) {
|
||
|
|
// key is any random string. like a url or filename or whatever.
|
||
|
|
return inflight(key, () => {
|
||
|
|
// this is where you'd fetch the url or whatever
|
||
|
|
return Promise.delay(100)
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
// only assigns a single setTimeout
|
||
|
|
// when it dings, all thens get called with the same result. (There's only
|
||
|
|
// one underlying promise.)
|
||
|
|
req('foo').then(…)
|
||
|
|
req('foo').then(…)
|
||
|
|
req('foo').then(…)
|
||
|
|
req('foo').then(…)
|
||
|
|
```
|
||
|
|
|
||
|
|
## SEE ALSO
|
||
|
|
|
||
|
|
* [inflight](https://npmjs.com/package/inflight) - For the callback based function on which this is based.
|
||
|
|
|
||
|
|
## STILL NEEDS
|
||
|
|
|
||
|
|
Tests!
|