https://github.com/bahmutov/draw-cycle

Simple Cycle.js application visualized: streams, events, DOM
https://github.com/bahmutov/draw-cycle

Last synced: about 1 month ago
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Simple Cycle.js application visualized: streams, events, DOM

• Host: GitHub
• URL: https://github.com/bahmutov/draw-cycle
• Owner: bahmutov
• Created: 2016-01-24T22:55:37.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2016-10-09T13:32:08.000Z (about 8 years ago)
• Last Synced: 2024-08-03T10:22:14.035Z (3 months ago)
• Language: HTML
• Homepage: https://glebbahmutov.com/draw-cycle/
• Size: 1.02 MB
• Stars: 147
• Watchers: 4
• Forks: 9
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

• awesome-reactive-programming - Draw Cycle

README

        
# draw-cycle

> Simple Cycle.js application visualized: streams, events, DOM

Try yourself at [glebbahmutov.com/draw-cycle](https://glebbahmutov.com/draw-cycle/)

![demo.gif](demo.gif)

Full video in original resolution at [https://youtu.be/-5-xyhd5fbQ](https://youtu.be/-5-xyhd5fbQ)

Simple Cycle.js taken from "Explicit dataflow" section at 

[http://cycle.js.org/](http://cycle.js.org/) - here is the application's code

```js

function main(sources) {

  const decrement$ = sources.DOM

    .select('.decrement').events('click').map(ev => -1);

  const increment$ = sources.DOM

    .select('.increment').events('click').map(ev => +1);

  const action$ = Observable.merge(decrement$, increment$);

  const count$ = action$.startWith(0).scan((x,y) => x+y);

  const vtree$ = count$.map(count =>

    div([

      button('.decrement', 'Decrement'),

      button('.increment', 'Increment'),

      p('Counter: ' + count)

    ])

  );

  return { DOM: vtree$ };

}

```

Visualization drawn using [Raphael.js](http://raphaeljs.com/)

### Small print

Author: Gleb Bahmutov © 2016

* [@bahmutov](https://twitter.com/bahmutov)

* [glebbahmutov.com](http://glebbahmutov.com)

* [blog](http://glebbahmutov.com/blog/)

License: MIT - do anything with the code, but don't blame me if it does not work.

Spread the word: tweet, star on github, etc.

Support: if you find any problems with this module, email / tweet /

[open issue](https://github.com/bahmutov/draw-cycle/issues) on Github

## MIT License

Copyright (c) 2016 Gleb Bahmutov

Permission is hereby granted, free of charge, to any person

obtaining a copy of this software and associated documentation

files (the "Software"), to deal in the Software without

restriction, including without limitation the rights to use,

copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the

Software is furnished to do so, subject to the following

conditions:

The above copyright notice and this permission notice shall be

included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES

OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT

HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,

WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

OTHER DEALINGS IN THE SOFTWARE.