deep-aplus

deep-aplus

Resolve a whole structure of promises

This small library is a promise-library agnostic function that resolves a whole structure or objects, arrays, promises and values to a single promise in which the whole structure is resolved.

Unlike other libraries like q-deep, resolve-deep and swear, this library is designed to work without dependencies to any promise library (and also without any other dependencies).

Note: There is no cycle check. You have to check for cycles yourself before passing the structure to the function

Installation

npm install deep-aplus

Usage

The following example demonstrates how to use this module:

import { deepAplus } from "../dist/index.mjs";

// Create a promise that returns a value (for demonstration purposes)
function P(value) {
  return new Promise((resolve) => setTimeout(() => resolve(value), 1));
}

console.log(await deepAplus(2));
// 2
console.log(await deepAplus(P(2)));
// 2

console.log(await deepAplus({ a: 1, b: P(2) }));
// { a: 1, b: 2 }

console.log(await deepAplus({ a: 1, b: [2, P(3)] }));
// { a: 1, b: [ 2, 3 ] }

console.log(await deepAplus({ a: 1, b: { c: 2, d: P(3) } }));
// { a: 1, b: { c: 2, d: 3 } }

// Nesting promises
console.log(await deepAplus({ a: 1, b: P([2, P(3)]) }));
// { a: 1, b: [ 2, 3 ] }

console.log(await deepAplus({ a: 1, b: P([2, P(3)]) }));
// { a: 1, b: [ 2, 3 ] }

console.log(await deepAplus({ a: 1, b: P({ c: 2, d: P(3) }) }));
// { a: 1, b: { c: 2, d: 3 } }

// does not dive into classes in order to preserve their functionality
class A {
  a = 2;
  b = P(3);
}

console.log(await deepAplus(new A()));
// A { a: 2, b: Promise { <pending> } })

License

deep-aplus is published under the MIT-license.

See LICENSE.md for details.

Release-Notes

For release notes, see CHANGELOG.md

Contributing guidelines

See CONTRIBUTING.md.