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https://github.com/bebraw/colorjoe

Scaleable color picker with touch and AMD support (MIT)
https://github.com/bebraw/colorjoe

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Scaleable color picker with touch and AMD support (MIT)

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README 

        







# colorjoe - The Scaleable Color Picker



colorjoe was somewhat inspired by

[ColorJack](http://www.dynamicdrive.com/dynamicindex11/colorjack/index.htm) and

[RightJS Colorpicker](http://rightjs.org/ui/colorpicker/demo). Unlike those it

actually scales pretty well. Essentially this means that you'll be able to

define its actual dimensions and layout using a bit of CSS. This way the widget

fits well responsive layouts.



In addition it's relatively easy to implement missing functionality (RGB fields,

whatnot) thanks to the simple API it provides.



## Installation



```bash

npm i colorjoe

```



If you prefer a standalone dist, add prepackaged `dist/colorjoe.js` and `css/colorjoe.css` to your page or use AMD to load

the dependencies from `src/`.



## Usage



```javascript

const joe = colorjoe.rgb(element_id_or_dom_object, initial_color_value, extras);

```



or



```javascript

const joe = colorjoe.hsl(element_id_or_dom_object, initial_color_value, extras);

```



### Event Handling



The returned joe object is an event emitter style object with `change` and

`done` events. The `change` event is fired continuously when selecting and

`done` is fired when user has stopped selecting.



```javascript

joe.on("change", color => console.log("Selecting " + color.css()));

joe.on("done", color => console.log("Selected " + color.css()));

```



The color object is from [one.color](https://github.com/One-com/one-color).



Given it might be nice to trigger these events immediately, there is a specific

`update` method. Ie. joe.on("change", function() {...}).update() would trigger

`change` immediately. This is handy for initializing your work.



### Get and Set



In addition there are `set` and `get` methods. Ie. joe.get() would return the

current color while joe.set('#aabbcc') would set it. `set` expects a parameter

that one.color default constructor would accept.



### Extras



In order to make it easier to customize a picker based on your needs, colorjoe

provides a few extras. The following example shows how to use them:



```javascript

const joe = colorjoe.hsl('hslPicker', 'red', [

    'currentColor',

    'alpha',

    ['fields', {space: 'HSL', limit: 255, fix: 0},

    'hex'

]);

```



The code above would generate a HSL picker that shows in addition the currently

selected color, alpha slider, HSL input fields and a hex field.



As you can see `fields` has been defined using an array. This array contains

the name of the extra and then parameters passed to inside an object. In this

case the extra accepts name of a color space (RGB, HSL, HSV or CMYK). If you

append `A` to the color space, it will show a control for alpha too. In

addition it takes a limit value (defaults to 255) and a fix value

(defaults to 0). fix represents the amount of numbers shown after decimal.



`hex` extra accepts optional `label`. If set it will show that as the input's

label.



### Implementing Custom Extras



It is possible to implement your custom extras without having to hack the core

code. This can be done as follows:



```javascript

colorjoe.registerExtra('text', (p, joe, o) => {

    // attach new elements to p element here (as children that is)

    // o is optional and will contain any parameters you might have

    // passed to the extra using the array syntax



    // optional return. these are triggered by colorjoe

    // use this way instead of joe.on

    return {

        change(col) {},

        done(col) {}

    };

})

```



Now you can simply pass your `text` extra amongst the others and it will just

work.



## Sites Using colorjoe



* [HTML Color Codes](http://htmlcolorcodes.com/)

* [CSS Gradient](https://cssgradient.io/)

* [HTML Colors](https://htmlcolors.com/)

* [Gradnts](https://gradnts.co/)



PRs are welcome!



## Contributors



* [Juho Vepsäläinen](https://github.com/bebraw) - Core

* [Esa-Matti Suuronen](https://github.com/epeli) -

  [Grunt](https://github.com/cowboy/grunt) support + removeAllListeners

* [Peter Müller](https://github.com/Munter) -

  [one.color](https://github.com/One-com/one-color) + HTML tweaks

* [Edmundas Kondrašovas](https://github.com/edmundask) - Callback `done` fix

* [Fabio Caseri](https://github.com/fabiocaseri) - Use hex code instead of `black`

* [Artem Zakharchenko](https://github.com/blackrabbit99) - Fix issue with initial color when it was set black on RGB (#20).

* [Tyler Waters](https://github.com/tswaters) - Improve CSS to work with IE better. Ensure `done` callback is fired for extras. Add validation to extra fields to avoid exceptions from one-color.

* [Elsa Balderrama](https://github.com/Lexas) - Trigger `done` correctly for alpha slider.

* [Jesse Keane](https://github.com/jarofghosts) - Add `onecolor` to `package.json` so that colorjoe works with Browserify

* [Sam Potts](https://github.com/SamPotts) - Improve formatting, generate random ids for labels, IE9+ support.

* [Mirza Zulfan](https://github.com/mirzazulfan) - Logo. #48, #49

* [Andreas Lind](https://github.com/papandreou) - Port build to rollup. #47



## Hacking



1. `npm i`

2. `npm start`

3. `serve` (or similar command) at project root



## License



colorjoe is available under MIT. See [LICENSE](https://github.com/bebraw/colorjoe/blob/master/LICENSE) for more details.