# promise-race-map

> Promise.race on a JavaScript map

Latest version **1.0.0** (published 2018-11-25) · MIT license · 0 weekly downloads

## Install

```sh
npm install promise-race-map
pnpm add promise-race-map
yarn add promise-race-map
bun add promise-race-map
```

## Health

**Score 15/100 (F)** — status: abandoned.

Positive: no vulnerabilities.

Warnings: low downloads; no types; no esm support.

Negative: abandoned; low maintenance score.

## Facts

| | |
|---|---|
| Version | 1.0.0 |
| Published | 2018-11-25 |
| First published | 2018-11-25 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | CommonJS |
| Dependencies | 1 |
| Unpacked size | 9.1 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 2 |
| Author | William Wong |
| Maintainers | compulim |
| Keywords | promise, race |

## Links

- npm: https://www.npmjs.com/package/promise-race-map
- Repository: https://github.com/compulim/promise-race-map
- Homepage: https://github.com/compulim/promise-race-map#readme
- Issues: https://github.com/compulim/promise-race-map/issues
- npm.io page: https://npm.io/package/promise-race-map

## Dependencies (1)

- [@babel/runtime](https://npm.io/package/@babel/runtime.md) ^7.1.5

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## Recent versions

- 1.0.0 (latest) — 2018-11-25
- 1.1.1-master.1817c1a (master) — 2020-05-26
- 1.1.0 — 2020-05-26
- 1.0.1-master.859cff9 — 2020-05-26
- 1.0.1-master.176b72d — 2019-07-18
- 1.0.1-master.634140f — 2018-11-25
- 1.0.1-master.2b46c64 — 2018-11-25
- 1.0.1-master.2265bff — 2018-11-25
- 1.0.1-master.d00bd97 — 2018-11-25
- 0.0.0-master.7a87112 — 2018-11-25

## README

# promise-race-map

[![npm version](https://badge.fury.io/js/promise-race-map.svg)](https://badge.fury.io/js/promise-race-map) [![Build Status](https://travis-ci.org/compulim/promise-race-map.svg?branch=master)](https://travis-ci.org/compulim/promise-race-map) [![Coverage Status](https://coveralls.io/repos/github/compulim/promise-race-map/badge.svg)](https://coveralls.io/github/compulim/promise-race-map)

A [`Promise.race`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/race) implementation that works with JavaScript map.

## Background

[`Promise.race`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/race) is useful when you need either one of the Promise to complete before proceeding. But if you need to process the result, it isn't easy to distinguish between two promises.

### Before using `promise-race-map`

Before using this package, you will need to write code like this.

```js
const p1 = fn1();
const p2 = fn2();

// Given both Promise do not return falsy values
const { r1, r2 } = await Promise.race([
  () => p1.then(res => ({ r1: res })),
  () => p2.then(res => ({ r2: res }))
]);

if (r1) {
  // Process result from fn1()
} else {
  // Process result from fn2()
}
```

### After using `promise-race-map`

After using this package, you can write shorter and more readable code like this.

```js
const { r1, r2 } = await Promise.race({
  r1: fn1(),
  r2: fn2()
});

if (r1) {
  // Process result from fn1()
} else {
  // Process result from fn2()
}
```

# Contributions

Like us? [Star](https://github.com/compulim/promise-race-map/stargazers) us.

Want to make it better? [File](https://github.com/compulim/promise-race-map/issues) us an issue.

Don't like something you see? [Submit](https://github.com/compulim/promise-race-map/pulls) a pull request.

---
_Source: https://npm.io/package/promise-race-map · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._