downstream

Downstream is a reactive programming library for JavaScript.

Its purpose is to be easy to understand, easy to extend, and easy to debug.

Getting started

Installation (browser)

git clone https://github.com/anttisykari/downstream

<script src='downstream.js'></script>

Installation (node.js)

npm install dstream

var stream = require('dstream');

First steps

// Create a source stream
var s = stream();

// You can observe stream's values
s.forEach(function(value) {
    console.log('I got a value', value);
});

// You can set its value
s.set(1);
// -> I got a value 1

// You can create a derived stream
var s2 = stream.map(function(value) {
    return value * 2;
});

s2.forEach(function(value) {
    console.log('s2', value);
});

s.set(123);
// -> s2 246

Anatomy of a stream

Stream's properties

• value
• children
• parents
• update (source stream)

Source streams

Derived streams

Using streams

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