colorjs.io/dist/color.min.js

Color space agnostic color manipulation library

var Color=function(t){"use strict";function e(t,e){let r=t.length;Array.isArray(t[0])||(t=[t]),Array.isArray(e[0])||(e=e.map(t=>[t]));let a=e[0].length,s=e[0].map((t,r)=>e.map(t=>t[r])),o=t.map(t=>s.map(e=>Array.isArray(t)?t.reduce((t,r,a)=>t+r*(e[a]||0),0):e.reduce((e,r)=>e+r*t,0)));return 1===r&&(o=o[0]),1===a?o.map(t=>t[0]):o}function r(t){return"string"===a(t)}function a(t){return(Object.prototype.toString.call(t).match(/^\[object\s+(.*?)\]$/)[1]||"").toLowerCase()}function s(t,...e){for(let r of e)if(r){let e=Object.getOwnPropertyDescriptors(r);Object.defineProperties(t,e)}return t}function o(t,e,r){let a=Object.getOwnPropertyDescriptor(e,r);Object.defineProperty(t,r,a)}function i(t,e,r=[0,1]){e=+e;let a=((r[1]||r[0]||1)+"").length,s=Math.max(0,e+1-a);return+t.toFixed(s)}function n(t){if(t.indexOf(".")>0){let[e,r]=t.split("."),a=Color.space(e);if(!(r in a.coords))throw new ReferenceError(`Color space "${a.name}" has no "${r}" coordinate.`);return[a,r]}}function c(t,e,r){let a=e.split("."),s=a.pop();if(t=a.reduceRight((t,e)=>t&&t[e],t))return void 0===r?t[s]:t[s]=r}var h=Object.freeze({__proto__:null,isString:r,type:a,extend:s,copyDescriptor:o,capitalize:function(t){return t?t[0].toUpperCase()+t.slice(1):t},toPrecision:i,parseCoord:n,value:c,multiplyMatrices:e});const l="undefined"!=typeof document;class p{constructor(...t){let e,a;if(t[0]&&"object"==typeof t[0]&&(t[0].space||t[0].spaceId)&&t[0].coords)a=t[0];else if(r(t[0])){if(l&&0===t[0].indexOf("--")){let t=arguments[1]&&1===arguments[1].nodeType?arguments[1]:document.documentElement;e=getComputedStyle(t).getPropertyValue(arguments[0])}else 1===t.length&&(e=t[0]);e&&(a=p.parse(e))}if(a)"spaceId"in a?this.spaceId=a.spaceId:this.space=a.space,this.coords=a.coords.slice(),this.alpha=a.alpha;else{let e,r,a;Array.isArray(t[0])?[e,r,a]=["sRGB",...t]:[e,r,a]=t,this.spaceId=e||"sRGB",this.coords=r?r.slice():[0,0,0],this.alpha=a}this.alpha=this.alpha<1?this.alpha:1;for(let t=0;t<this.coords.length;t++)"NaN"===this.coords[t]&&(this.coords[t]=NaN)}get space(){return p.spaces[this.spaceId]}set space(t){return this.spaceId=t}get spaceId(){return this._spaceId}set spaceId(t){let e=p.space(t);if(t=e.id,this.space&&e&&this.space!==e){this.coords=this[t];for(let t in this.space.instance)this.hasOwnProperty(t)&&delete this[t]}this._spaceId=t,s(this,this.space.instance)}get white(){return this.space.white||p.whites.D50}set(t,e){if(1===arguments.length&&"object"===a(arguments[0])){let t=arguments[0];for(let e in t)this.set(e,t[e])}else if("function"==typeof e){let r=c(this,t);c(this,t,e.call(this,r))}else c(this,t,e);return this}lighten(t=.25){let e=new p(this),r=e.lightness;return e.lightness=r*(1+t),e}darken(t=.25){let e=new p(this),r=e.lightness;return e.lightness=r*(1-t),e}distance(t,e="lab"){t=p.get(t);let r=this[(e=p.space(e)).id],a=t[e.id];return Math.sqrt(r.reduce((t,e,r)=>isNaN(e)||isNaN(a[r])?t:t+(a[r]-e)**2,0))}deltaE(t,e={}){r(e)&&(e={method:e});let{method:a=p.defaults.deltaE,...s}=e;return t=p.get(t),this["deltaE"+a]?this["deltaE"+a](t,s):this.deltaE76(t)}deltaE76(t){return this.distance(t,"lab")}get luminance(){return this.xyz.Y}set luminance(t){this.xyz.Y=t}contrast(t){t=p.get(t);let e=this.luminance,r=t.luminance;return r>e&&([e,r]=[r,e]),(e+.05)/(r+.05)}get uv(){let[t,e,r]=this.xyz,a=t+15*e+3*r;return[4*t/a,9*e/a]}get xy(){let[t,e,r]=this.xyz,a=t+e+r;return[t/a,e/a]}getCoords({inGamut:t,precision:e=p.defaults.precision}={}){let r=this.coords;if(t&&!this.inGamut()&&(r=this.toGamut(!0===t?void 0:t).coords),null!=e){let t=this.space.coords?Object.values(this.space.coords):[];r=r.map((r,a)=>i(r,e,t[a]))}return r}inGamut(t=this.space,e){return t=p.space(t),p.inGamut(t,this[t.id],e)}static inGamut(t,e,{epsilon:r=75e-6}={}){if((t=p.space(t)).inGamut)return t.inGamut(e);{if(!t.coords)return!0;let a=Object.values(t.coords);return e.every((t,e)=>{if(Number.isNaN(t))return!0;let[s,o]=a[e];return(void 0===s||t>=s-r)&&(void 0===o||t<=o+r)})}}toGamut({method:t=p.defaults.gamutMapping,space:e=this.space,inPlace:a}={}){if(r(arguments[0])&&(e=arguments[0]),e=p.space(e),this.inGamut(e,{epsilon:0}))return this;let s=this.to(e);if(t.indexOf(".")>0&&!this.inGamut(e)){let r=s.toGamut({method:"clip",space:e}),a=this.deltaE(r,{method:"2000"});if(this.deltaE(r,{method:"2000"})>2.3){let[r,o]=n(t),i=s.to(r),c=.001,h=r.coords[o][0],l=i[o],p=s.deltaE(i,{method:"2000"});for(;l-h>c&&p<a;){let t=i.toGamut({space:e,method:"clip"}),r=i.deltaE(t,{method:"2000"});if(p=s.deltaE(i,{method:"2000"}),r-2<c)h=i[o];else{if(Math.abs(r-2)<c)break;l=i[o]}i[o]=(l+h)/2}s=i.to(e)}else s=r}if("clip"===t||!s.inGamut(e,{epsilon:0})){let t=Object.values(e.coords);s.coords=s.coords.map((e,r)=>{let[a,s]=t[r];return void 0!==a&&(e=Math.max(a,e)),void 0!==s&&(e=Math.min(e,s)),e})}return e.id!==this.spaceId&&(s=s.to(this.space)),a?(this.coords=s.coords,this):s}clone(){return new p(this.spaceId,this.coords,this.alpha)}to(t,{inGamut:e}={}){let r=(t=p.space(t)).id,a=new p(r,this[r],this.alpha);return e&&a.toGamut({inPlace:!0}),a}toJSON(){return{spaceId:this.spaceId,coords:this.coords,alpha:this.alpha}}toString({precision:t=p.defaults.precision,format:e,commas:a,inGamut:s,name:o="color",fallback:i}={}){let n=this.alpha<1?` ${a?",":"/"} ${this.alpha}`:"",c=this.getCoords({inGamut:s,precision:t});if(c=c.map(t=>t||0),r(e)&&"%"===e){let r=t;(!Number.isInteger(t)||t>21)&&(r=21),e=t=>t.toLocaleString("en-US",{style:"percent",maximumSignificantDigits:r})}"function"==typeof e&&(c=c.map(e));let h=[...c];"color"===o&&h.unshift(this.space?this.space.cssId||this.space.id:"XYZ");let u=`${o}(${h.join(a?", ":" ")}${n})`;if(i){if(!l||!self.CSS||CSS.supports("color",u))return u=new String(u),u.color=this,u;let e=Array.isArray(i)?i.slice():p.defaults.fallbackSpaces;for(let r,a=0;r=e[a];a++)if(p.spaces[r]){let s=this.to(r);if(u=s.toString({precision:t}),CSS.supports("color",u))return u=new String(u),u.color=s,u;e===p.defaults.fallbackSpaces&&(e.splice(a,1),a--)}let r=this.to("srgb");u=new String(r.toString({commas:!0})),u.color=r}return u}equals(t){return t=p.get(t),this.spaceId===t.spaceId&&this.alpha===t.alpha&&this.coords.every((e,r)=>e===t.coords[r])}static chromaticAdaptation(t,r,a,s={}){if((t=t||p.whites.D50)===(r=r||p.whites.D50))return a;let o={W1:t,W2:r,XYZ:a,options:s};if(p.hooks.run("chromatic-adaptation-start",o),o.M||(o.W1===p.whites.D65&&o.W2===p.whites.D50?o.M=[[1.0478112,.0228866,-.050127],[.0295424,.9904844,-.0170491],[-.0092345,.0150436,.7521316]]:o.W1===p.whites.D50&&o.W2===p.whites.D65&&(o.M=[[.9555766,-.0230393,.0631636],[-.0282895,1.0099416,.0210077],[.0122982,-.020483,1.3299098]])),p.hooks.run("chromatic-adaptation-end",o),o.M)return e(o.M,o.XYZ);throw new TypeError("Only Bradford CAT with white points D50 and D65 supported for now.")}static parse(t){let e={str:t};if(p.hooks.run("parse-start",e),e.color)return e.color;if(e.parsed=p.parseFunction(e.str),p.hooks.run("parse-function-start",e),e.color)return e.color;for(let t of Object.values(p.spaces))if(t.parse){let r=t.parse(e.str,e.parsed);if(r)return r}let r=e.parsed&&e.parsed.name;if(!/^color|^rgb/.test(r)&&l&&document.head){let a=document.head.style.color;if(document.head.style.color="",document.head.style.color=t,document.head.style.color!==a){let s=getComputedStyle(document.head).color;document.head.style.color=a,s&&(t=s,e.parsed=p.parseFunction(s),r=e.parsed.name)}}if(e.parsed){if("rgb"===r||"rgba"===r){let t=e.parsed.args.map((t,e)=>e<3&&!t.percentage?t/255:+t);return{spaceId:"srgb",coords:t.slice(0,3),alpha:t[3]}}if("color"===r){let t=e.parsed.args.shift().toLowerCase(),r=Object.values(p.spaces).find(e=>(e.cssId||e.id)===t);if(r){let t=Object.keys(r.coords).length,a=e.parsed.rawArgs.indexOf("/")>0?e.parsed.args.pop():1,s=Array(t).fill(0);return s.forEach((t,r)=>s[r]=e.parsed.args[r]||0),{spaceId:r.id,coords:s,alpha:a}}throw new TypeError(`Color space ${t} not found. Missing a plugin?`)}}throw new TypeError(`Could not parse ${t} as a color. Missing a plugin?`)}static parseFunction(t){if(!t)return;t=t.trim();const e=/^-?[\d.]+$/;let r=t.match(/^([a-z]+)\((.+?)\)$/i);if(r){let t=r[2].match(/([-\w.]+(?:%|deg)?)/g);return t=t.map(t=>{if(/%$/.test(t)){let e=new Number(+t.slice(0,-1)/100);return e.percentage=!0,e}if(/deg$/.test(t)){let e=new Number(+t.slice(0,-3));return e.deg=!0,e}return e.test(t)?+t:t}),{name:r[1].toLowerCase(),rawName:r[1],rawArgs:r[2],args:t}}}static convert(t,e,r){if((e=p.space(e))===(r=p.space(r)))return t;t=t.map(t=>Number.isNaN(t)?0:t);let a=e.id,s=r.id;if(r.from&&r.from[a])return r.from[a](t);if(e.to&&e.to[s])return e.to[s](t);let o=e.toXYZ(t);return r.white!==e.white&&(o=p.chromaticAdaptation(e.white,r.white,o)),r.fromXYZ(o)}static get(t,...e){return t instanceof p?t:new p(t,...e)}static space(t){let e=a(t);if("string"===e){let e=p.spaces[t.toLowerCase()];if(!e)throw new TypeError(`No color space found with id = "${t}"`);return e}if(t&&"object"===e)return t;throw new TypeError(t+" is not a valid color space")}static defineSpace({id:t,inherits:e}){let r=p.spaces[t]=arguments[0];if(e){const t=["id","parse","instance","properties"];let a=p.spaces[e];for(let e in a)t.includes(e)||e in r||o(r,a,e)}let a=r.coords;if(r.properties&&s(p.prototype,r.properties),!r.fromXYZ&&!r.toXYZ){let t;if(r.from&&r.to){let e=new Set(Object.keys(r.from)),a=new Set(Object.keys(r.to)),s=[...e].filter(t=>{if(a.has(t)){let e=p.spaces[t];return e&&e.fromXYZ&&e.toXYZ}});s.length>0&&(t=p.spaces[s[0]])}if(!t)throw new ReferenceError(`No connection space found for ${r.name}.`);Object.assign(r,{fromXYZ(e){let r=t.fromXYZ(e);return this.from[t.id](r)},toXYZ(e){let r=this.to[t.id](e);return t.toXYZ(r)}})}let i=Object.keys(a);return Object.defineProperty(p.prototype,t,{get(){let e=p.convert(this.coords,this.spaceId,t);return self.Proxy?new Proxy(e,{has:(t,e)=>i.includes(e)||Reflect.has(t,e),get:(t,e,r)=>{let a=i.indexOf(e);return a>-1?t[a]:Reflect.get(t,e,r)},set:(e,r,a,s)=>{let o=i.indexOf(r);return r>-1&&(o=r),o>-1?(e[o]=a,this.coords=p.convert(e,t,this.spaceId),!0):Reflect.set(e,r,a,s)}}):e},set(e){this.coords=p.convert(e,t,this.spaceId)},configurable:!0,enumerable:!0}),r}static defineShortcut(t,e=p.prototype,r){r&&(p.shortcuts[t]=r),Object.defineProperty(e,t,{get(){return c(this,p.shortcuts[t])},set(e){return c(this,p.shortcuts[t],e)},configurable:!0,enumerable:!0})}static statify(t=[]){t=t||Object.getOwnPropertyNames(p.prototype);for(let t of Object.getOwnPropertyNames(p.prototype)){let e=Object.getOwnPropertyDescriptor(p.prototype,t);e.get||e.set||"function"!=typeof e.value||t in p||(p[t]=function(e,...r){return(e=p.get(e))[t](...r)})}}}Object.assign(p,{util:h,hooks:new class{add(t,e,r){if("string"==typeof arguments[0])(Array.isArray(t)?t:[t]).forEach((function(t){this[t]=this[t]||[],e&&this[t][r?"unshift":"push"](e)}),this);else for(var t in arguments[0])this.add(t,arguments[0][t],arguments[1])}run(t,e){this[t]=this[t]||[],this[t].forEach((function(t){t.call(e&&e.context?e.context:e,e)}))}},whites:{D50:[.96422,1,.82521],D65:[.95047,1,1.08883]},spaces:{},shortcuts:{lightness:"lch.lightness",chroma:"lch.chroma",hue:"lch.hue"},defaults:{gamutMapping:"lch.chroma",precision:5,deltaE:"76",fallbackSpaces:["p3","srgb"]}}),p.defineSpace({id:"xyz",name:"XYZ",coords:{X:[],Y:[],Z:[]},white:p.whites.D50,inGamut:t=>!0,toXYZ:t=>t,fromXYZ:t=>t});for(let t in p.shortcuts)p.defineShortcut(t);p.statify(),p.defineSpace({id:"lab",name:"Lab",coords:{L:[0,100],a:[-100,100],b:[-100,100]},inGamut:t=>!0,white:p.whites.D50,"ε":216/24389,"κ":24389/27,fromXYZ(t){const{"κ":e,"ε":r,white:a}=this;let s=t.map((t,e)=>t/a[e]).map(t=>t>r?Math.cbrt(t):(e*t+16)/116);return[116*s[1]-16,500*(s[0]-s[1]),200*(s[1]-s[2])]},toXYZ(t){const{"κ":e,"ε":r,white:a}=this;let s=[];return s[1]=(t[0]+16)/116,s[0]=t[1]/500+s[1],s[2]=s[1]-t[2]/200,[Math.pow(s[0],3)>r?Math.pow(s[0],3):(116*s[0]-16)/e,t[0]>e*r?Math.pow((t[0]+16)/116,3):t[0]/e,Math.pow(s[2],3)>r?Math.pow(s[2],3):(116*s[2]-16)/e].map((t,e)=>t*a[e])},parse(t,e=p.parseFunction(t)){if(e&&"lab"===e.name){let t=e.args[0];return t.percentage&&(e.args[0]=100*t),{spaceId:"lab",coords:e.args.slice(0,3),alpha:e.args.slice(3)[0]}}},instance:{toString({format:t,...e}={}){return t||(t=(t,e)=>0===e?t+"%":t),p.prototype.toString.call(this,{name:"lab",format:t,...e})}}});const u=[0,360];function d(t){return(t%360+360)%360}u.isAngle=!0,p.defineSpace({id:"lch",name:"LCH",coords:{lightness:[0,100],chroma:[0,150],hue:u},inGamut:t=>!0,white:p.whites.D50,from:{lab(t){let e,[r,a,s]=t;const o=5e-4;return e=Math.abs(a)<o&&Math.abs(s)<o?NaN:180*Math.atan2(s,a)/Math.PI,[r,Math.sqrt(a**2+s**2),d(e)]}},to:{lab(t){let[e,r,a]=t;return r<0&&(r=0),isNaN(a)&&(a=0),[e,r*Math.cos(a*Math.PI/180),r*Math.sin(a*Math.PI/180)]}},parse(t,e=p.parseFunction(t)){if(e&&"lch"===e.name){let t=e.args[0];return t.percentage&&(e.args[0]=100*t),{spaceId:"lch",coords:e.args.slice(0,3),alpha:e.args.slice(3)[0]}}},instance:{toString({format:t,...e}={}){return t||(t=(t,e)=>0===e?t+"%":t),p.prototype.toString.call(this,{name:"lch",format:t,...e})}}}),p.defineSpace({id:"srgb",name:"sRGB",coords:{red:[0,1],green:[0,1],blue:[0,1]},white:p.whites.D65,toLinear:t=>t.map((function(t){return t<.04045?t/12.92:Math.pow((t+.055)/1.055,2.4)})),toGamma:t=>t.map((function(t){return t>.0031308?1.055*Math.pow(t,1/2.4)-.055:12.92*t})),toXYZ_M:[[.4124564,.3575761,.1804375],[.2126729,.7151522,.072175],[.0193339,.119192,.9503041]],fromXYZ_M:[[3.2404542,-1.5371385,-.4985314],[-.969266,1.8760108,.041556],[.0556434,-.2040259,1.0572252]],toXYZ(t){return t=this.toLinear(t),e(this.toXYZ_M,t)},fromXYZ(t){return this.toGamma(e(this.fromXYZ_M,t))},properties:{toHex({alpha:t=!0,collapse:e=!0}={}){let r=this.to("srgb",{inGamut:!0}).coords;this.alpha<1&&t&&r.push(this.alpha),r=r.map(t=>Math.round(255*t));let a=e&&r.every(t=>t%17==0);return"#"+r.map(t=>a?(t/17).toString(16):t.toString(16).padStart(2,"0")).join("")},get hex(){return this.toHex()}},instance:{toString({inGamut:t=!0,commas:e,format:r="%",...a}={}){if(255===r)r=t=>255*t;else if("hex"===r)return this.toHex(arguments[0]);return p.prototype.toString.call(this,{inGamut:t,commas:e,format:r,name:"rgb"+(e&&this.alpha<1?"a":""),...a})}},parseHex(t){t.length<=5&&(t=t.replace(/[a-f0-9]/gi,"$&$&"));let e=[];return t.replace(/[a-f0-9]{2}/gi,t=>{e.push(parseInt(t,16)/255)}),{spaceId:"srgb",coords:e.slice(0,3),alpha:e.slice(3)[0]}}}),p.hooks.add("parse-start",t=>{let e=t.str;/^#([a-f0-9]{3,4}){1,2}$/i.test(e)&&(t.color=p.spaces.srgb.parseHex(e))}),p.defineSpace({id:"hsl",name:"HSL",coords:{hue:u,saturation:[0,100],lightness:[0,100]},inGamut(t){let e=this.to.srgb(t);return p.inGamut("srgb",e)},white:p.whites.D65,from:{srgb(t){t=t.map(t=>100*t);let e=Math.max.apply(Math,t),r=Math.min.apply(Math,t),[a,s,o]=t,[i,n,c]=[NaN,0,(r+e)/2],h=e-r;if(0!==h){switch(n=100*h/(100-Math.abs(2*c-100)),e){case a:i=(s-o)/h+(s<o?6:0);break;case s:i=(o-a)/h+2;break;case o:i=(a-s)/h+4}i*=60}return[i,n,c]}},to:{srgb(t){let[e,r,a]=t;function s(t){let s=(t+e/30)%12,o=r*Math.min(a,1-a);return a-o*Math.max(-1,Math.min(s-3,9-s,1))}return e%=360,e<0&&(e+=360),r/=100,a/=100,[s(0),s(8),s(4)]}},parse(t,e=p.parseFunction(t)){if(e&&/^hsla?$/.test(e.name)){let t=e.args;return t[1]*=100,t[2]*=100,{spaceId:"hsl",coords:t.slice(0,3),alpha:t[3]}}},instance:{toString({precision:t,commas:e,format:r,inGamut:a,...s}={}){return r||(r=(t,e)=>e>0?t+"%":t),p.prototype.toString.call(this,{inGamut:!0,commas:e,format:r,name:"hsl"+(e&&this.alpha<1?"a":""),...s})}}}),p.defineSpace({id:"hwb",name:"HWB",coords:{hue:u,whiteness:[0,100],blackness:[0,100]},inGamut(t){let 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