const promiseAllEnd = require('promiseallend'); const promises = [Promise.resolve(1), Promise.reject('error'), Promise.resolve(2)]; const promisesObj = {k1: Promise.resolve(1), k2: Promise.reject('error'), k3: Promise.resolve(2)}; // input promises with array promiseAllEnd(promises, { unhandledRejection(error, index) { // error is the original error which is 'error'. // index is the index of array, it's a number. console.log(error, index); } }) // will call, data is `[1, undefined, 2]` .then(data => console.log(data)) // won't call .catch(error => console.log(error.detail)) // input promises with object promiseAllEnd(promisesObj, { unhandledRejection(error, prop) { // error is the original error. // key is the property of object. console.log(error, prop); } }) // will call, data is `{k1: 1, k3: 2}` .then(data => console.log(data)) // won't call .catch(error => console.log(error.detail)) // the same to `Promise.all` promiseAllEnd(promises, {requireConfig: true}) // will call, `error.detail` is 'error', `error.key` is number 1. .catch(error => console.log(error.detail)) // requireConfig is Array promiseAllEnd(promises, {requireConfig: [false, true, false]}) // won't call .then(data => console.log(data)) // will call, `error.detail` is 'error', `error.key` is number 1. .catch(error => console.log(error.detail)) // requireConfig is Array promiseAllEnd(promises, {requireConfig: [true, false, false]}) // will call, data is `[1, undefined, 2]`. .then(data => console.log(data)) // won't call .catch(error => console.log(error.detail))