# Observables with Streams

A library for observables built with [WHATWG streams](https://streams.spec.whatwg.org). This library is inspired by [ReactiveX’s operators](http://reactivex.io/documentation/operators.html) and implements a subset of them using [streams](https://streams.spec.whatwg.org).

```
npm install --save observables-with-streams
```

The goal of this library is to implement observables making as much use of the platform as possible and being highly tree-shakeable.

## Example

```html
<!DOCTYPE html>

<button id="dec">-</button>

<span id="counter">0</span>

<button id="inc">+</button>

<script type="module">
  import * as ows from "observables-with-streams";

  ows.merge(
    ows.fromEvent(
      document.querySelector("#dec")
      "click"
    ).pipeThrough(ows.map(() => -1)),
    ows.fromEvent(
      document.querySelector("#inc")
      "click"
    ).pipeThrough(ows.map(() => 1))
  )
    .pipeThrough(
      ows.scan((v0, v1) => v0 + v1, 0)
    )
    .pipeTo(
      ows.discard(
        v => document.querySelector("#counter").textContent = v
      )
    );
</script>
```

## Documentation

The (somewhat lacking) documentation for this library is hosted at https://observables-with-streams.surma.technology

## Caveats

While most browsers have [partial support of streams](https://caniuse.com/#feat=streams) in stable, this library makes heavy use of [TransformStreams](https://streams.spec.whatwg.org/#ts-model), which are currently not well supported. Until browsers catch up, I can recommend [Mattias Buelens'](https://twitter.com/MattiasBuelens) [web-streams-polyfill](https://npm.im/web-streams-polyfill).

For a good primer about streams, read this [blog post](https://jakearchibald.com/2016/streams-ftw/) by [Jake Archibald](https://twitter.com/jaffathecake/) (he is aware the title hasn’t aged well).

---

License Apache 2.0


A library of observables built with streams. 

observables-with-streams

A library of observables built with streams

surma

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observables-with-streams

Observables with Streams

Example

Documentation

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