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promise-inflight

promise-inflight

One promise for multiple requests in flight to avoid async duplication

USAGE

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 - For the callback based function on which this is based.

STILL NEEDS

Tests!