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@open-draft/deferred-promise

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@open-draft/deferred-promise

A Promise-compatible abstraction that defers resolving/rejecting promises to another closure.


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Maintainers
1
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What is @open-draft/deferred-promise?

@open-draft/deferred-promise is a utility library that provides a way to create and manage deferred promises. This can be particularly useful in scenarios where you need to create a promise and resolve or reject it at a later time, outside of the initial promise executor function.

What are @open-draft/deferred-promise's main functionalities?

Creating a Deferred Promise

This feature allows you to create a deferred promise that can be resolved or rejected at a later time. The code sample demonstrates creating a deferred promise, resolving it after a timeout, and then using the promise in an async function.

const { DeferredPromise } = require('@open-draft/deferred-promise');

const deferred = new DeferredPromise();

// You can resolve or reject the promise later
setTimeout(() => {
  deferred.resolve('Resolved value');
}, 1000);

// Use the promise
async function main() {
  const result = await deferred;
  console.log(result); // 'Resolved value'
}

main();

Handling Rejection

This feature allows you to handle the rejection of a deferred promise. The code sample demonstrates creating a deferred promise, rejecting it after a timeout, and then handling the rejection in an async function.

const { DeferredPromise } = require('@open-draft/deferred-promise');

const deferred = new DeferredPromise();

// You can resolve or reject the promise later
setTimeout(() => {
  deferred.reject(new Error('Something went wrong'));
}, 1000);

// Use the promise
async function main() {
  try {
    const result = await deferred;
  } catch (error) {
    console.error(error.message); // 'Something went wrong'
  }
}

main();

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Package last updated on 07 Sep 2023

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