78 lines
2.4 KiB
Markdown
78 lines
2.4 KiB
Markdown
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# mini-signals
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signals, in JavaScript, fast
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[](https://www.npmjs.com/package/mini-signals) [](https://travis-ci.org/Hypercubed/mini-signals/) [](https://www.codacy.com/app/hypercubed/mini-signals) [](https://github.com/Hypercubed/mini-signals/blob/master/LICENSE)
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## Description
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Custom event/messaging system for JavaScript inspired by [js-signals](https://github.com/millermedeiros/js-signals) originally based on [EventEmitter3](https://github.com/primus/eventemitter3) code base.
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There are several advantages to signals over event-emitters (see [Comparison between different Observer Pattern implementations](https://github.com/millermedeiros/js-signals/wiki/Comparison-between-different-Observer-Pattern-implementations)). However, the current implementation of [js-signals](https://github.com/millermedeiros/js-signals) is (arguably) slow compared to other implementations (see [EventsSpeedTests](https://github.com/Hypercubed/EventsSpeedTests)). `mini-signals` is a fast, minimal emitter, with an API similar to [js-signals](https://github.com/millermedeiros/js-signals).
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## Install
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### npm:
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```
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npm install mini-signals
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```
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### jspm:
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```
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jspm install mini-signals=npm:mini-signals
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```
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### bower:
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```
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bower install mini-signals
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```
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## Example Usage
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***When not using a module loader the mini-signals constructor (`MiniSignal`) is global.***
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```
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var MiniSignal = require('mini-signals');
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var mySignal = new MiniSignal();
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var binding = mySignal.add(onSignal); //add listener
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mySignal.dispatch('foo', 'bar'); //dispatch signal passing custom parameters
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binding.detach(); //remove a single listener
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function onSignal(foo, bar) {
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assert(foo === 'foo');
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assert(bar === 'bar');
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}
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```
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## Another Example
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```
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var myObject = {
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foo: 'bar',
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updated: new MiniSignal()
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}
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myObject.updated.add(onUpdated,myObject); //add listener with context
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myObject.foo = 'baz';
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myObject.updated.dispatch(); //dispatch signal
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function onUpdated() {
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assert(this === myObject);
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assert(this.foo === 'baz');
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}
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```
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## API
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See [API.md](https://github.com/Hypercubed/mini-signals/blob/master/API.md)
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## License
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Copyright (c) 2015 Jayson Harshbarger
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MIT License
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