Make a promise always fulfill with its actual fulfillment value or rejection reason

Useful when you want a promise to fulfill no matter what and would rather handle the actual state afterwards.

$ npm install --save p-reflect

Here, Promise.all would normally fail early because one of the promises rejects, but by using p-reflect, we can ignore the rejection and handle it later on.

const pReflect = require('p-reflect');

const promises = [
	getPromise(),
	getPromiseThatRejects(),
	getPromise()
];

Promise.all(promises.map(pReflect)).then(result => {
	console.log(result);
	/*
	[{
		isFulfilled: true,
		isRejected: false,
		value: '🦄'
	},
	{
		isFulfilled: false,
		isRejected: true,
		reason: [Error: 👹]
	},
	{
		isFulfilled: true,
		isRejected: false,
		value: '🐴'
	}]
	*/

	const ret = f.filter(x => x.isFulfilled).map(x => x.value).join('');
	console.log(ret);
	//=> '🦄🐴'
});

The above is just an example. Use p-settle if you need this.

Returns a fulfilled Promise.

The fulfilled value is an object with the following properties:

• isFulfilled
• isRejected
• value or reason (Depending on whether the promise fulfilled or rejected)

Type: Promise

• p-settle - Settle promises concurrently and get their fulfillment value or rejection reason
• More…

MIT © Sindre Sorhus