https://github.com/slorber/awesome-only-resolves-last-promise

Wraps an async function, and ensures that only last call will ever resolve/reject
https://github.com/slorber/awesome-only-resolves-last-promise

List: awesome-only-resolves-last-promise

Last synced: about 1 month ago
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Wraps an async function, and ensures that only last call will ever resolve/reject

• Host: GitHub
• URL: https://github.com/slorber/awesome-only-resolves-last-promise
• Owner: slorber
• Created: 2019-02-21T10:50:03.000Z (almost 6 years ago)
• Default Branch: master
• Last Pushed: 2021-07-05T09:19:50.000Z (over 3 years ago)
• Last Synced: 2024-10-24T04:28:22.917Z (about 2 months ago)
• Language: TypeScript
• Homepage: https://sebastienlorber.com
• Size: 330 KB
• Stars: 28
• Watchers: 3
• Forks: 2
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# awesome-only-resolves-last-promise

[![NPM](https://img.shields.io/npm/dm/awesome-only-resolves-last-promise.svg)](https://www.npmjs.com/package/awesome-only-resolves-last-promise)

[![Build Status](https://travis-ci.com/slorber/awesome-only-resolves-last-promise.svg?branch=master)](https://travis-ci.com/slorber/awesome-only-resolves-last-promise)

## Install

```bash

npm install --save awesome-only-resolves-last-promise

// or

yarn add awesome-only-resolves-last-promise

```

## Features

- Wraps an existing async function

- When calling the wrapped function multiple times consecutively, only the last returned promise will resolve and formerly returned promises will be cancelled (they won't resolve nor reject)

## Usage

```typescript jsx

import { onlyResolvesLast } from 'awesome-only-resolves-last-promise';

const asyncFunction = async (arg: number, arg2: string) => {

  await delay(100);

  return `val ${arg} ${arg2}`;

};

const wrappedAsyncFunction = onlyResolvesLast(asyncFunction);

const promise1 = wrappedAsyncFunction(1, '1');

const promise2 = wrappedAsyncFunction(2, '2');

const promise3 = wrappedAsyncFunction(3, '3');

// promise1 and promise2 will never resolve/reject

// promise3 will resolve in 100ms

```

Useful as an implementation detail of [awesome-debounce-promise](https://github.com/slorber/awesome-debounce-promise).

## License

MIT © [slorber](https://github.com/slorber)

# Hire a freelance expert

Looking for a React/ReactNative freelance expert with more than 5 years production experience?

Contact me from my [website](https://sebastienlorber.com/) or with [Twitter](https://twitter.com/sebastienlorber).