Settle promises concurrently and get their fulfillment value or rejection reason
$ npm install p-settle
const {promises: fs} = require('fs');
const pSettle = require('p-settle');
(async () => {
const files = [
'a.txt',
'b.txt' // Doesn't exist
].map(fileName => fs.readFile(fileName, 'utf8'));
console.log(await pSettle(files));
/*
[
{
isFulfilled: true,
isRejected: false,
value: '🦄'
},
{
isFulfilled: false,
isRejected: true,
reason: [Error: ENOENT: no such file or directory, open 'b.txt']
}
]
*/
})();Returns a Promise<object[]> that is fulfilled when all promises from the array argument are settled.
The objects in the array have the following properties:
isFulfilledisRejectedvalueorreason(Depending on whether the promise fulfilled or rejected)
Type: Array<ValueType | PromiseLike<ValueType> | ((...args: any[]) => PromiseLike<ValueType>)>
The array can contain a mix of any value, promise, and async function. Promises are awaited. Async functions are executed and awaited. The concurrency option only works for elements that are async functions.
Type: object
Type: number (Integer)
Default: Infinity
Minimum: 1
Number of concurrently pending promises.
Note: This only limits concurrency for elements that are async functions, not promises.