https://github.com/lanfei/deferred-lib

A lightweight implementation of Deferred/Promise.
https://github.com/lanfei/deferred-lib

deffered promise

Last synced: 5 days ago
JSON representation

A lightweight implementation of Deferred/Promise.

• Host: GitHub
• URL: https://github.com/lanfei/deferred-lib
• Owner: Lanfei
• Created: 2014-08-20T10:35:00.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2016-07-19T08:23:20.000Z (over 8 years ago)
• Last Synced: 2024-12-16T19:57:06.555Z (about 2 months ago)
• Topics: deffered, promise
• Language: JavaScript
• Homepage: https://nodei.co/npm/deferred-lib
• Size: 15.6 KB
• Stars: 0
• Watchers: 4
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

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

```

## 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.**