sts0mrg0/vanilla-colorful

A tiny color picker custom element for modern web apps (2.7 KB) 🎨

vanilla-colorful is a port of react-colorful to vanilla Custom Elements.

Features

• Small: Just 2,7 KB (minified and gzipped). Size Limit controls the size.
• Fast: Built with standards based Custom Elements.
• Bulletproof: Written in strict TypeScript and covered by 100+ tests.
• Simple: The interface is straight forward and easy to use.
• Accessible: Follows the WAI-ARIA guidelines to support users of assistive technologies.
• Mobile-friendly: Works well on mobile devices and touch screens.
• Framework-agnostic: Can be used with any framework.
• No dependencies

Live demo

• Website
• Angular example
• LitElement example
• React example
• Svelte example
• Vue example

Install

npm install vanilla-colorful --save

Or use one of the following content delivery networks:

unpkg.com CDN:

<script type="module" src="https://unpkg.com/vanilla-colorful?module"></script>

Skypack CDN:

<script type="module" src="https://cdn.skypack.dev/vanilla-colorful"></script>

Usage

<hex-color-picker color="#1e88e5"></hex-color-picker>
<script type="module">
  import 'vanilla-colorful';

  const picker = document.querySelector('hex-color-picker');
  picker.addEventListener('color-changed', (event) => {
    // get updated color value
    const newColor = event.detail.value;
  });

  // get current color value
  console.log(picker.color);
</script>

ES modules

vanilla-colorful is authored using ES modules which are natively supported by modern browsers. However, it also uses "bare module imports" which are not yet standardized and require a small transform.

We recommend the following tools for the ES modules based development:

• @web/dev-server resolves bare module imports on the fly.
• snowpack performs one-time transform when installing dependencies.
• @rollup/plugin-node-resolve is needed when using Rollup.

None of these tools are needed when importing the component from CDN.

Supported color models

The default vanilla-colorful's input/output format is a HEX string (like #ffffff). In case if you need another color model, we provide 12 additional color picker bundles.

How to use another color model

Available pickers

File to import	HTML element	Value example
"hex-color-picker.js"	<hex-color-picker>	"#ffffff"
"hsl-color-picker.js"	<hsl-color-picker>	{ h: 0, s: 0, l: 100 }
"hsl-string-color-picker.js"	<hsl-string-color-picker>	"hsl(0, 0%, 100%)"
"hsla-color-picker.js"	<hsla-color-picker>	{ h: 0, s: 0, l: 100, a: 1 }
"hsla-string-color-picker.js"	<hsla-string-color-picker>	"hsla(0, 0%, 100%, 1)"
"hsv-color-picker.js"	<hsv-color-picker>	{ h: 0, s: 0, v: 100 }
"hsv-string-color-picker.js"	<hsv-string-color-picker>	"hsv(0, 0%, 100%)"
"hsva-color-picker.js"	<hsva-color-picker>	{ h: 0, s: 0, v: 100, a: 1 }
"hsva-string-color-picker.js"	<hsva-string-color-picker>	"hsva(0, 0%, 100%, 1)"
"rgb-color-picker.js"	<rgb-color-picker>	{ r: 255, g: 255, b: 255 }
"rgba-color-picker.js"	<rgba-color-picker>	{ r: 255, g: 255, b: 255, a: 1 }
"rgb-string-color-picker.js"	<rgb-string-color-picker>	"rgb(255, 255, 255)"
"rgba-string-color-picker.js"	<rgba-string-color-picker>	"rgba(255, 255, 255, 1)"

Code example

<rgba-color-picker></rgba-color-picker>
<script type="module">
  import 'vanilla-colorful/rgba-color-picker.js';

  const picker = document.querySelector('rgba-color-picker');
  picker.color = { r: 50, g: 100, b: 150, a: 1 };
</script>

Overriding styles

vanilla-colorful exposes CSS Shadow Parts allowing to override the default styles:

hex-color-picker {
  height: 250px;
}

hex-color-picker::part(saturation) {
  bottom: 30px;
  border-radius: 3px 3px 0 0;
}

hex-color-picker::part(hue) {
  height: 30px;
  border-radius: 0 0 3px 3px;
}

hex-color-picker::part(saturation-pointer) {
  border-radius: 5px;
}

hex-color-picker::part(hue-pointer) {
  border-radius: 2px;
  width: 15px;
  height: inherit;
}

HEX input

vanilla-colorful provides an additional <hex-input> element that can be used to type a color:

<hex-input color="#1e88e5"></hex-input>
<script type="module">
  import 'vanilla-colorful/hex-input.js';

  const input = document.querySelector('hex-input');
  input.addEventListener('color-changed', (event) => {
    const newColor = event.detail.value;
  });
</script>

<hex-input> renders an unstyled <input> element inside a slot and exposes it for styling using part. You can also pass your own <input> element as a child if you want to fully configure it.

Base classes

vanilla-colorful provides a set of base classes that can be imported without registering custom elements. This is useful if you want to create your own color picker with a different tag name.

import { RgbBase } from 'vanilla-colorful/lib/entrypoints/rgb.js';

customElements.define('custom-color-picker', class extends RgbBase {});

TypeScript support

vanilla-colorful supports TypeScript and ships with types in the library itself; no need for any other install.

How you can get the most from our TypeScript support

While not only typing its own class methods and variables, it can also help you type yours. Depending on the element you are using, you can also import the type that is associated with the element. For example, if you are using our <hsl-color-picker> element, you can also import the HslColor type.

import type { HslColor } from 'vanilla-colorful/hsl-color-picker';

const myHslValue: HslColor = { h: 0, s: 0, l: 0 };

All the included custom elements are compatible with lit-analyzer and lit-plugin extension for Visual Studio Code, so you can benefit from type checking in lit-html templates.

Browser support

vanilla-colorful uses Custom Elements and Shadow DOM, and does not support IE11 or legacy Edge.

Why vanilla-colorful?

vanilla-colorful has all the benefits of react-colorful with one important difference.

While react-colorful claims to have zero dependencies, it still expects you to use React or Preact. This means that Angular, Vue, Svelte or vanilla JS users would have an extra dependency in their apps.

Now when all the evergreen browsers support standards based Custom Elements, it's perfect time to build such tiny and lightweight UI controls as web components rather than framework components.