settle-all-promises
Utility to run multiple promises & deliver execution results of all Promises at a time.
An alternative to Promise.allSettled() method for versions of node prior to 12.9.0
Installation
npm i settle-all-promises --saveUse
var settle = require('settle-all-promises').settle;
var stat = require('settle-all-promises').stat;
var p0 = new Promise((resolve, reject) => {
resolve('p0 result')
});
var p1 = new Promise((resolve, reject) => {
resolve({'message' : 'p1 result message'})
});
var p2 = new Promise((resolve, reject) => {
reject('p2')
});
settle([p0, p1, p2]).then(results => {
// p0 result at index 0
console.log('p0 isResolved() ' + results[0].isResolved);
console.log(results[0].resultData);
// p1 result at index 1
console.log('p1 isResolved() ' + results[1].isResolved);
console.log(JSON.stringify(results[1].resultData));
// p2 result at index 2
console.log('p2 isResolved() ' + results[2].isResolved);
console.log('p2 isRejected() ' + results[2].isRejected);
console.log(results[2]);
// Print statistics of execution
console.log(JSON.stringify(stat(results)));
})Output
p0 isResolved() true
p0 result
p1 isResolved() true
{"message":"p1 result message"}
p2 isResolved() false
p2 isRejected() true
PromiseResult {
_original: Promise { <rejected> 'p2' },
_resultData: null,
_errorData: 'p2'
}
{"resolvedCount":2,"rejectedCount":1}Note
Use of arrow OR Lambda function syntax may not be allowed in older node versions prior to 4.2.4 use normal function callbacks syntax instead. Take look at examples below,
// 1. Using arrow function AKA Lambda function, for node versions
// after or equal to 4.0.0
settle([p0, p1, p2]).then(results => {
// Process results here
});
// 2. Using normal function callback, for node versions
// before 4.0.0
settle([p0, p1, p2]).then(function(results) {
// Process results here
});
// 3. Using async-await, for node versions
// after or equal to 7.6.0
async function callSettle() {
const results = await settle([p0, p1, p2]);
// Process results here
}For additional examples checkout the test/index.test.ts file.
Compatibility
Min node version tested against -> v0.12.0
Max node version tested against -> v14.3.0