iro.js

Modular, design-conscious color picker widget for JavaScript - with support for a bunch of color formats | iro.js.org

Features | Demo | Installation | Usage | Plugins | Documentation | Special Thanks | Forum

Features

* Work with colors in hex, RGB, HSV and HSL formats (plus kelvin temperatures!) in one simple, frictionless API
* Add multiple colors to the same color picker for selecting color harmonies and themes
* Create the perfect color picker from a selection of pre-built UI components
* All of iro.js can run from a single script - no extra CSS, images, or third-party libraries required!
* ~9kb minified and gzipped
* Licenced under MPL 2.0 - 100% free for personal and commercial use

Codepen Demos

* Basic introduction
* Multicolor
* Components / alternate layouts
* Custom handle SVGs

Installation

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``sh
npm install @jaames/iro --save
`


If you are using a module bundler like Webpack or Rollup, import iro.js into your project:


`js
// Using ES6 module syntax
import iro from '@jaames/iro';

// Using CommonJS modules
const iro = require('@jaames/iro');
`


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`html

`


When you manually include the library like this, iro.js will be made globally available on window.iro.

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Development version

Uncompressed, with source comments included. Intended for debugging.

Production version

Minified and optimized version.

Then add it to the of your page with a



`

Usage

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First, we need a HTML element with a unique identifier (like an id attribute) to act as a container for the color picker:

`html



`

Then use JavaScript to create a new iro.ColorPicker with a CSS selector that matches your container element:

`js
var colorPicker = new iro.ColorPicker('#picker');
`

You can also use a DOM object instead of a CSS selector here -- this might be more suitable if you're integrating iro.js into an application built with a framework such as Vue, React, etc.

Color Picker Options

The color picker can be customized by passing a set of options to the second iro.ColorPicker parameter:



`js
var colorPicker = new iro.ColorPicker("#picker", {
// Set the size of the color picker
width: 320,
// Set the initial color to pure red
color: "#f00"
});
`


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Option	Purpose	Default Value
width	Total width of the control UI.	300
color	The initial color value. This can be any supported color format.	#ffffff
colors	Initial color values used for multi-color selections.	null
display	CSS display value for the color picker root element.	block
id	HTML ID for the color picker root element.	null
layout	Used for customising the UI component layout.	null
layoutDirection	UI component stacking direction; either vertical or horizontal.	vertical
padding	Padding around the control handles.	6
margin	Gap between individual components.	12
borderWidth	Width of the border around the controls. Set to 0 for no border.	0
borderColor	Color of the border. Any valid CSS color is supported.	#ffffff
handleRadius	Radius of the control handles.	8
handleSvg	Custom handle SVG, used for custom handles.	null
handleProps	Custom handle properties, used for custom handles.	{x:0, y:0}
wheelLightness	If set to false, the color wheel will not fade to black when the lightness decreases.	true
wheelAngle	Starting angle of the color wheel's hue gradient, measured in degrees.	0
wheelDirection	Direction of the color wheel's hue gradient; either clockwise or anticlockwise.	anticlockwise
sliderSize	Slider control size. By default this will be calculated automatically.	undefined
boxHeight	Box control height. By default this will be the same as the width.	undefined

More details about color picker options, properties, and methods can be found on the colorPicker API documentation.

Working with Colors

Each color picker has a color object which stores the currently selected color. This color object is tied to the color picker, so any changes to its values will be reflected by the picker, and vice versa.

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The color object has some "magic" properties which can be used to both get and set the selected color in different formats. Whenever one of these properties is set, the color picker controls will update and the color:change event will fire.

For example, to get the current color as a hex string:

`js
var hex = colorPicker.color.hexString;
console.log(hex); // hex = "#ff0000"
`

Or to set the selected color from a hsl object:

`js
colorPicker.color.hsl = { h: 180, s: 100, l: 50 };
// Color picker updates to match hsl(180, 100, 50)
`

The color object has properties which cover all of the most common web color formats (HEX, RGB, HSL and HSV), as well as some extras:

























Property	Example Format
hexString	#ff0000
hex8String	#ff0000ff
rgb	{ r: 255, g: 0, b: 0 }
rgba	{ r: 255, g: 0, b: 0, a: 1 }
rgbString	rgb(255, 0, 0)
rgbaString	rgb(255, 0, 0, 1)
hsl	{ h: 360, s: 100, l: 50 }
hsla	{ h: 360, s: 100, l: 50, a: 1 }
hslString	hsl(360, 100%, 50%)
hslaString	hsla(360, 100%, 50%, 1)
hsv	{ h: 360, s: 100, v: 100 }
hsva	{ h: 360, s: 100, v: 100, a: 1 }
red	0 to 255
green	0 to 255
blue	0 to 255
alpha	0 to 1
hue	0 to 360
saturation	0 to 100
value	0 to 100
kelvin	1000 to 40000

For more details about color objects, check out the Color API documentation.

Color Picker Events

Events let you to run your own code after certain things have happened, like when the selected color has changed or when the user has interacted with the color picker.

The color picker's on method can be used to attach functions that will be called whenever a particular event is fired. In this example, we add a listener for the color:change event:



`js
// listen to a color picker's color:change event
// color:change callbacks receive the current color
colorPicker.on('color:change', function(color) {
// log the current color as a HEX string
console.log(color.hexString);
});
`


The on method can also take an array of event names, in case you want to listen to multiple events with one function:



`js
// listen to a color picker's color:init and color:change events
colorPicker.on(['color:init', 'color:change'], function(color) {
// log the current color as a HEX string
console.log(color.hexString);
});
`


Event listeners can also be removed at any time by passing the same function to the color picker's off method:



`js
// create a callback function
function onColorChange(color) {
console.log(color.hexString);
}

// add color:change listener
colorPicker.on('color:change', onColorChange);

// later, if we want to stop listening to color:change...
colorPicker.off('color:change', onColorChange);
`


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##### color:change

Fired whenever the selected color changes -- either when the user interacts with the color picker, or when the color is updated by your own code. This event's callback functions will recieve two values:

* color: the currently selected color
* changes: an object showing which HSV channels have changed since the last time the event was fired

It is safe to modify the color object within callbacks for this event. This can be helpful if you want to limit the range or a certain color channel, for example:



`js
colorPicker.on('color:change', function(color) {
// don't let the color saturation fall below 50!
if (color.saturation < 50) {
color.saturation = 50;
}
});
`


##### input:change

Similar to color:change, except this event is only fired when the color is changed with the user's mouse or touch input.

Callbacks for this event recieve the same values as color:change, and it is also safe to modify the color object within callbacks for this event.

##### input:start

Fired whenever the users starts interacting with the color picker controls. The currently selected color is passed to this event's callback function.

##### input:move

Fired when the user moves their pointer/mouse after beginning interaction. The currently selected color is passed to this event's callback function.

##### input:end

Fired whenever the user stops interacting with the color picker controls. The currently selected color is passed to this event's callback function.

##### color:init

Fired whenever a color is added. This event's callbacks will recieve the newly added color object.

##### color:remove

Fired when a color is removed from the color picker. This event's callbacks will receive the removed color object.

##### color:setActive

Fired whenever the 'active' color is switched. This event's callbacks will receive the active color object.

##### mount`

Fired when the colorPicker's UI has been mounted to the DOM and is ready for user interaction. The colorPicker object is passed to this event's callback function.

Special Thanks

Thank you to the following people for their support and contributions!

- @KaanMol and @mksglu for starting the Typescript port
- @asonix for vertical slider implementation

Sponsored by Ship Shape

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© James Daniel