47 lines
1.6 KiB
JavaScript
47 lines
1.6 KiB
JavaScript
|
'use strict';
|
||
|
|
var $ = require('../internals/export');
|
||
|
|
var aFunction = require('../internals/a-function');
|
||
|
|
var getBuiltIn = require('../internals/get-built-in');
|
||
|
|
var newPromiseCapabilityModule = require('../internals/new-promise-capability');
|
||
|
|
var perform = require('../internals/perform');
|
||
|
|
var iterate = require('../internals/iterate');
|
||
|
|
|
||
|
|
var PROMISE_ANY_ERROR = 'No one promise resolved';
|
||
|
|
|
||
|
|
// `Promise.any` method
|
||
|
|
// https://github.com/tc39/proposal-promise-any
|
||
|
|
$({ target: 'Promise', stat: true }, {
|
||
|
|
any: function any(iterable) {
|
||
|
|
var C = this;
|
||
|
|
var capability = newPromiseCapabilityModule.f(C);
|
||
|
|
var resolve = capability.resolve;
|
||
|
|
var reject = capability.reject;
|
||
|
|
var result = perform(function () {
|
||
|
|
var promiseResolve = aFunction(C.resolve);
|
||
|
|
var errors = [];
|
||
|
|
var counter = 0;
|
||
|
|
var remaining = 1;
|
||
|
|
var alreadyResolved = false;
|
||
|
|
iterate(iterable, function (promise) {
|
||
|
|
var index = counter++;
|
||
|
|
var alreadyRejected = false;
|
||
|
|
errors.push(undefined);
|
||
|
|
remaining++;
|
||
|
|
promiseResolve.call(C, promise).then(function (value) {
|
||
|
|
if (alreadyRejected || alreadyResolved) return;
|
||
|
|
alreadyResolved = true;
|
||
|
|
resolve(value);
|
||
|
|
}, function (e) {
|
||
|
|
if (alreadyRejected || alreadyResolved) return;
|
||
|
|
alreadyRejected = true;
|
||
|
|
errors[index] = e;
|
||
|
|
--remaining || reject(new (getBuiltIn('AggregateError'))(errors, PROMISE_ANY_ERROR));
|
||
|
|
});
|
||
|
|
});
|
||
|
|
--remaining || reject(new (getBuiltIn('AggregateError'))(errors, PROMISE_ANY_ERROR));
|
||
|
|
});
|
||
|
|
if (result.error) reject(result.value);
|
||
|
|
return capability.promise;
|
||
|
|
}
|
||
|
|
});
|