#app
View Compiled
/* PrismJS 1.23.0
https://prismjs.com/download.html#themes=prism-tomorrow&languages=css+css-extras&plugins=line-numbers+inline-color+toolbar+copy-to-clipboard */
/**
* prism.js tomorrow night eighties for JavaScript, CoffeeScript, CSS and HTML
* Based on https://github.com/chriskempson/tomorrow-theme
* @author Rose Pritchard
*/
code[class*="language-"],
pre[class*="language-"] {
color: #ccc;
background: none;
font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
font-size: 1em;
text-align: left;
white-space: pre;
word-spacing: normal;
word-break: normal;
word-wrap: normal;
line-height: 1.5;
-moz-tab-size: 4;
-o-tab-size: 4;
tab-size: 4;
-webkit-hyphens: none;
-moz-hyphens: none;
-ms-hyphens: none;
hyphens: none;
}
/* Code blocks */
pre[class*="language-"] {
padding: 2rem;
margin: 0;
overflow: auto;
outline: transparent;
}
:not(pre) > code[class*="language-"],
pre[class*="language-"] {
background: #2d2d2d;
}
/* Inline code */
:not(pre) > code[class*="language-"] {
padding: .1em;
border-radius: .3em;
white-space: normal;
}
.token.comment,
.token.block-comment,
.token.prolog,
.token.doctype,
.token.cdata {
color: #999;
}
.token.punctuation {
color: #ccc;
}
.token.tag,
.token.attr-name,
.token.namespace,
.token.deleted {
color: #e2777a;
}
.token.function-name {
color: #6196cc;
}
.token.boolean,
.token.number,
.token.function {
color: #f08d49;
}
.token.property,
.token.class-name,
.token.constant,
.token.symbol {
color: #f8c555;
}
.token.selector,
.token.important,
.token.atrule,
.token.keyword,
.token.builtin {
color: #cc99cd;
}
.token.string,
.token.char,
.token.attr-value,
.token.regex,
.token.variable {
color: #7ec699;
}
.token.operator,
.token.entity,
.token.url {
color: #67cdcc;
}
.token.important,
.token.bold {
font-weight: bold;
}
.token.italic {
font-style: italic;
}
.token.entity {
cursor: help;
}
.token.inserted {
color: green;
}
pre[class*="language-"].line-numbers {
position: relative;
padding-left: 3.8em;
counter-reset: linenumber;
}
pre[class*="language-"].line-numbers > code {
position: relative;
white-space: inherit;
}
.line-numbers .line-numbers-rows {
position: absolute;
pointer-events: none;
top: 0;
font-size: 100%;
left: -3.8em;
width: 3em; /* works for line-numbers below 1000 lines */
letter-spacing: -1px;
border-right: 1px solid #999;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}
.line-numbers-rows > span {
display: block;
counter-increment: linenumber;
}
.line-numbers-rows > span:before {
content: counter(linenumber);
color: #999;
display: block;
padding-right: 0.8em;
text-align: right;
}
span.inline-color-wrapper {
/*
* The background image is the following SVG inline in base 64:
*
* <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 2 2">
* <path fill="gray" d="M0 0h2v2H0z"/>
* <path fill="white" d="M0 0h1v1H0zM1 1h1v1H1z"/>
* </svg>
*
* SVG-inlining explained:
* https://stackoverflow.com/a/21626701/7595472
*/
background: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyIDIiPjxwYXRoIGZpbGw9ImdyYXkiIGQ9Ik0wIDBoMnYySDB6Ii8+PHBhdGggZmlsbD0id2hpdGUiIGQ9Ik0wIDBoMXYxSDB6TTEgMWgxdjFIMXoiLz48L3N2Zz4=");
/* This is to prevent visual glitches where one pixel from the repeating pattern could be seen. */
background-position: center;
background-size: 110%;
display: inline-block;
height: 1.333ch;
width: 1.333ch;
margin: 0 .333ch;
box-sizing: border-box;
border: 1px solid white;
outline: 1px solid rgba(0,0,0,.5);
overflow: hidden;
}
span.inline-color {
display: block;
/* To prevent visual glitches again */
height: 120%;
width: 120%;
}
div.code-toolbar {
position: relative;
}
div.code-toolbar > .toolbar {
position: absolute;
top: .3em;
right: .2em;
opacity: 1;
}
div.code-toolbar:hover > .toolbar {
opacity: 1;
}
/* Separate line b/c rules are thrown out if selector is invalid.
IE11 and old Edge versions don't support :focus-within. */
div.code-toolbar:focus-within > .toolbar {
opacity: 1;
}
div.code-toolbar > .toolbar .toolbar-item {
display: inline-block;
}
div.code-toolbar > .toolbar a {
cursor: pointer;
}
div.code-toolbar > .toolbar button {
background: none;
border: 0;
color: inherit;
font: inherit;
line-height: normal;
overflow: visible;
padding: 0;
-webkit-user-select: none; /* for button */
-moz-user-select: none;
-ms-user-select: none;
}
div.code-toolbar > .toolbar a,
div.code-toolbar > .toolbar button {
color: #bbb;
font-size: 1rem;
padding: 0.5rem;
font-family: sans-serif;
background: hsl(0, 0%, 25%);
border-radius: .5em;
outline: transparent;
cursor: pointer;
}
div.code-toolbar > .toolbar a:hover,
div.code-toolbar > .toolbar a:focus,
div.code-toolbar > .toolbar button:hover,
div.code-toolbar > .toolbar button:focus,
div.code-toolbar > .toolbar span:hover,
div.code-toolbar > .toolbar span:focus {
background: hsl(0, 0%, 40%);
text-decoration: none;
}
* {
box-sizing: border-box;
}
body {
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
flex-direction: column;
background: hsl(0, 0%, 98%);
overflow-x: hidden;
overflow-y: scroll;
}
#app {
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
background: hsl(0, 0%, 98%);
padding: 2rem;
}
.scene {
display: flex;
width: 100vw;
align-items: start;
justify-content: center;
padding-bottom: 3rem;
}
#hue,
#saturation,
#lightness {
width: 200px;
}
label {
font-family: sans-serif;
font-weight: bold;
color: hsl(0, 0%, 14%);
}
.controls {
display: grid;
grid-template-columns: auto 1fr;
grid-template-rows: auto auto auto auto;
align-items: center;
grid-gap: 2rem 2rem;
width: 50%;
max-width: 400px;
padding: 2rem;
position: fixed;
left: 50%;
top: 50%;
transform: translate(0, -50%);
}
.result {
display: grid;
grid-template-columns: 1fr auto;
border-radius: 10px;
overflow: hidden;
box-shadow: 0 2rem 3rem -2rem hsl(0, 0%, 10%);
position: absolute;
top: 50%;
right: 50%;
transform: translate(0, -116px);
}
.palette {
display: grid;
grid-template-rows: repeat(var(--shades, 8), 1fr);
height: 100%;
background: linear-gradient(var(--shade-1), var(--bg));
}
.palette__shade {
background: var(--shade, var(--shade-one));
width: 41px;
}
.slider-thumb {
background: transparent;
position: relative;
&:after {
content: '';
position: absolute;
top: 50%;
left: 50%;
border-radius: 50%;
transform: translate(-50%, -50%);
background: var(--shade-2);
height: 24px;
width: 24px;
border: '2px solid hsl(%s, 80%, 50%)' % var(--hue, 0)
}
&:active {
border: '2px solid hsl(%s, 80%, 50%)' % var(--hue, 0);
}
}
.slider-track {
height: 10px;
width: 100%;
background: hsl(0, 0%, 90%);
border: 1px solid hsl(0, 0%, 70%);
}
View Compiled
import React, {
Fragment,
useRef,
useState,
} from 'https://cdn.skypack.dev/react'
import T from 'https://cdn.skypack.dev/prop-types'
import { render } from 'https://cdn.skypack.dev/react-dom'
import { Range } from 'https://cdn.skypack.dev/react-range'
const ROOT_NODE = document.querySelector('#app')
const getCode = (hue, saturation, lightness, shades) => {
const LIGHT_STEP = (lightness[1] - lightness[0]) / shades
const SAT_STEP = (saturation[1] - saturation[0]) / shades
let RESULT = `:root {\n`
for (let s = 0; s < shades + 1; s++) {
const LIGHTNESS = Math.floor(lightness[1] - s * LIGHT_STEP)
const SATURATION = Math.floor(saturation[1] - s * SAT_STEP)
RESULT += ` --shade-${s +
1}: hsl(${hue}, ${SATURATION}%, ${LIGHTNESS}%);\n`
}
return (RESULT += '}')
}
const Slider = ({ min = 0, max, values, onChange }) => (
<Range
step={1}
min={min}
max={max}
values={values}
onChange={onChange}
renderTrack={({ props, children }) => (
<div
{...props}
className="slider-track"
style={{
...props.style,
}}>
{children}
</div>
)}
renderThumb={({ props }) => (
<div
{...props}
className="slider-thumb"
style={{
...props.style,
borderRadius: '50%',
outline: 'transparent',
height: '44px',
width: '44px',
}}
/>
)}
/>
)
Slider.propTypes = {
style: T.object,
min: T.number,
max: T.number,
values: T.Array,
onChange: T.func,
}
const getCodeMarkup = code => {
return Prism.highlight(code, Prism.languages.css, 'css')
}
const App = () => {
const [hue, setHue] = useState([Math.floor(Math.random() * 360)])
const [saturation, setSaturation] = useState([0, 100])
const [lightness, setLightness] = useState([0, 100])
const [shades, setShades] = useState([7])
const styleRef = useRef(getCode(hue[0], saturation, lightness, shades[0]))
const cssRef = useRef(getCodeMarkup(styleRef.current))
return (
<Fragment>
<div
className="scene"
style={{
'--hue': hue[0],
}}>
<div className="result">
<pre>
<code
className="language-css"
dangerouslySetInnerHTML={{ __html: cssRef.current }}
/>
</pre>
<div
className="palette"
style={{
'--shades': shades[0] + 1,
'--bg': `var(--shade-${shades[0] + 1})`
}}>
{new Array(shades[0] + 1).fill().map((shade, index) => (
<div
key={index}
className="palette__shade"
style={{
'--shade': `var(--shade-${index + 1})`,
}}></div>
))}
</div>
</div>
<div className="controls">
<label>Hue</label>
<Slider
max={360}
values={hue}
onChange={values => {
styleRef.current = getCode(
values[0],
saturation,
lightness,
shades[0]
)
cssRef.current = getCodeMarkup(styleRef.current)
setHue(values)
}}
/>
<label>Saturation</label>
<Slider
max={100}
values={saturation}
onChange={values => {
styleRef.current = getCode(hue[0], values, lightness, shades[0])
cssRef.current = getCodeMarkup(styleRef.current)
setSaturation(values)
}}
/>
<label>Lightness</label>
<Slider
max={100}
values={lightness}
onChange={values => {
styleRef.current = getCode(hue[0], saturation, values, shades[0])
cssRef.current = getCodeMarkup(styleRef.current)
setLightness(values)
}}
/>
<label>Shades</label>
<Slider
min={2}
max={49}
values={shades}
onChange={values => {
styleRef.current = getCode(
hue[0],
saturation,
lightness,
values[0]
)
cssRef.current = getCodeMarkup(styleRef.current)
setShades(values)
}}
/>
</div>
</div>
<style dangerouslySetInnerHTML={{ __html: styleRef.current }} />
</Fragment>
)
}
render(<App />, ROOT_NODE)
View Compiled
This Pen doesn't use any external CSS resources.