# deferred-lib

> A lightweight implementation of Deferred/Promise.

Latest version **2.0.3** (published 2016-07-19) · MIT license · 0 weekly downloads

## Install

```sh
npm install deferred-lib
pnpm add deferred-lib
yarn add deferred-lib
bun add deferred-lib
```

## 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 | 2.0.3 |
| Published | 2016-07-19 |
| First published | 2015-08-04 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | CommonJS |
| Dependencies | 0 |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 0 |
| Author | Lanfei |
| Maintainers | clanfei |
| Keywords | deferred, promise, when, then |

## Links

- npm: https://www.npmjs.com/package/deferred-lib
- Repository: https://github.com/Lanfei/deferred-lib
- Homepage: https://github.com/Lanfei/deferred-lib#readme
- Issues: https://github.com/Lanfei/deferred-lib/issues
- npm.io page: https://npm.io/package/deferred-lib

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## Recent versions

- 2.0.3 (latest) — 2016-07-19
- 2.0.2 — 2016-07-19
- 2.0.1 — 2015-08-04
- 2.0.0 — 2015-08-04

## README

# Deferred

A lightweight implementation of Deferred/Promise.

[![NPM](https://nodei.co/npm/deferred-lib.png?downloads=true&downloadRank=true&stars=true)](https://nodei.co/npm/deferred-lib)

## Installation

### Node

```bash
$ npm install deferred-lib
```

### Browser

```html
<script src="js/deferred.min.js"></script>
```

## Usage

```js
// Usage 1
// Declare the deferred instance and use it.
function countdown1() {
	var deferred = new Deferred();
	var i = 5;
	var timer = setInterval(function () {
		deferred.notify(i);
		if (i-- === 0) {
			deferred.resolve('Hi');
			clearInterval(timer);
		}
	}, 300);
	return deferred.promise();
}

countdown1().progress(function (step) {
	console.log('countdown1', step);
}).done(function () {
	console.log('countdown1 done');
});


// Usage 2
// Use `Deferred(fn)` and get the deferred instance with `this` context.
function countdown2() {
	var self = this;
	var i = 5;
	var timer = setInterval(function () {
		self.notify(i);
		if (i-- === 0) {
			self.resolve('Hi');
			clearInterval(timer);
		}
	}, 300);
}

Deferred(countdown2).progress(function (step) {
	console.log('countdown2', step);
}).done(function () {
	console.log('countdown2 done');
});
```

**See `examples` directory for more usages.**

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