promise-sometime

Promise.all() behavior but with a timout.

Installation

npm install promise-sometime

Usage

promiseSome([promises], timeout)

Waits for promises until either they all resolve, one rejects, or timeout ms has elapsed.

Returns and array or results in the same way as Promise.all(). If the timout is reached the array will have undefined for any promises that have not yet resolved.

Example

const promiseSome = require('promise-some');

var p1 = new Promise((resolve, reject) => { 
  setTimeout(resolve, 1000, "one"); 
}); 
var p2 = new Promise((resolve, reject) => { 
  setTimeout(resolve, 2000, "two"); 
});
var p3 = new Promise((resolve, reject) => {
  setTimeout(resolve, 3000, "three");
});
var p4 = new Promise((resolve, reject) => {
  setTimeout(resolve, 4000, "four");
});
var p5 = "five"


promiseSome([p1, p2, p3, p4, p5], 3500).then(value => { 
  console.log(value);
}, function(reason) {
  console.log(reason)
});

//From console:
// [ "one", "two", "three", undefined, "five" ]

promiseSome() has the same "fail fast" behavior as Promise.all() if the rejection happens before the timeout.