done

.gitignore

@@ -16,3 +16,5 @@ rsync-exclude
 node_modules
 
 .idea
+
+built

build/build.mjs

@@ -1,5 +1,6 @@
-var fs = require('fs');
-const { resolve } = require('path');
+/* eslint-disable no-undef */
+import { copyFile } from 'fs';
+import path from 'path';
 
 /*
 color-thief.umd.js duplicated as color-thief.min.js for legacy support
@@ -17,20 +18,20 @@ duplicating the UMD compatible file and giving it that name.
 const umdRelPath = 'dist/color-thief.umd.js';
 const legacyRelPath = 'dist/color-thief.min.js';
 
-const umdPath = resolve(process.cwd(), umdRelPath);
-const legacyPath = resolve(process.cwd(), legacyRelPath);
+const umdPath = path.join( path.resolve( path.dirname( '' ) ), umdRelPath );
+const legacyPath = path.join( path.resolve( path.dirname( '' ) ), legacyRelPath );
 
-fs.copyFile(umdPath, legacyPath, (err) => {
-    if (err) throw err;
-    console.log(`${umdRelPath} copied to ${legacyRelPath}.`);
-});
+copyFile( umdPath, legacyPath, ( err ) => {
+    if ( err ) throw err;
+    console.log( `${ umdRelPath } copied to ${ legacyRelPath }.` );
+} );
 
-const srcNodeRelPath = 'src/color-thief-node.js';
+const srcNodeRelPath = 'built/color-thief-node.js';
 const distNodeRelPath = 'dist/color-thief.js';
-const srcNodePath = resolve(process.cwd(), srcNodeRelPath);
-const distNodePath = resolve(process.cwd(), distNodeRelPath);
+const srcNodePath = path.join( path.resolve( path.dirname( '' ) ), srcNodeRelPath );
+const distNodePath = path.join( path.resolve( path.dirname( '' ) ), distNodeRelPath );
 
-fs.copyFile(srcNodePath, distNodePath, (err) => {
-    if (err) throw err;
-    console.log(`${srcNodeRelPath} copied to ${distNodeRelPath}.`);
-});
+copyFile( srcNodePath, distNodePath, ( err ) => {
+    if ( err ) throw err;
+    console.log( `${ srcNodeRelPath } copied to ${ distNodeRelPath }.` );
+} );

cypress.config.cjs

@@ -0,0 +1,15 @@
+/* eslint-disable no-undef */
+/* eslint-disable @typescript-eslint/no-var-requires */
+const { defineConfig } = require( 'cypress' );
+
+module.exports = defineConfig( {
+    'e2e': {
+    // We've imported your old cypress plugins here.
+    // You may want to clean this up later by importing these.
+        setupNodeEvents ( on, config ) {
+            return require( './cypress/plugins/index.cjs' )( on, config );
+        },
+
+        'experimentalRunAllSpecs': true,
+    },
+} );

cypress.config.js

@@ -1,13 +0,0 @@
-const { defineConfig } = require('cypress')
-
-module.exports = defineConfig({
-  e2e: {
-    // We've imported your old cypress plugins here.
-    // You may want to clean this up later by importing these.
-    setupNodeEvents(on, config) {
-      return require('./cypress/plugins/index.js')(on, config)
-    },
-
-    experimentalRunAllSpecs: true,
-  },
-})

cypress/test-pages/es6-module.html

@@ -28,7 +28,7 @@
         if (img.complete) {
             getColorFromImage(img);
         } else {
-            image.addEventListener('load', function() {
+            img.addEventListener('load', function() {
                 getColorFromImage(img);
             });
         }

cypress/test-pages/index.js

@@ -11,49 +11,58 @@ var images = [
 ];
 
 // Render example images
-var examplesHTML = Mustache.to_html(document.getElementById('image-tpl').innerHTML, images);
-document.getElementById('example-images').innerHTML = examplesHTML;
+console.log( Mustache );
+var examplesHTML = Mustache.render( document.getElementById( 'image-tpl' ).innerHTML, images );
+document.getElementById( 'example-images' ).innerHTML = examplesHTML;
 
 // Once images are loaded, process them
-document.querySelectorAll('.image').forEach((image) => {
-    const section = image.closest('.image-section');
-    if (this.complete) {
-        showColorsForImage(image, section);
+document.querySelectorAll( '.image' ).forEach( ( image ) => {
+    const section = image.closest( '.image-section' );
+    if ( this.complete ) {
+        showColorsForImage( image, section );
     } else {
-        image.addEventListener('load', function() {
-            showColorsForImage(image, section);
-        });
+        image.addEventListener( 'load', function () {
+            showColorsForImage( image, section );
+            // showColorsForImageURLNewAPI( )
+        } );
     }
-})
+} );
 
 // Run Color Thief functions and display results below image.
 // We also log execution time of functions for display.
-const showColorsForImage = function(image, section) {
+const showColorsForImage = function ( image, section ) {
     // getColor(img)
     let start = Date.now();
-    let result = colorThief.getColor(image);
+    let result = colorThief.getColor( image );
     let elapsedTime = Date.now() - start;
-    const colorHTML = Mustache.to_html(document.getElementById('color-tpl').innerHTML, {
-        color: result,
-        colorStr: result.toString(),
+    const colorHTML = Mustache.render( document.getElementById( 'color-tpl' ).innerHTML, {
+        'color': result,
+        'colorStr': result.toString(),
         elapsedTime
-    })
+    } );
 
     // getPalette(img)
     let paletteHTML = '';
-    let colorCounts = [2, 3, 5, 7, 10, 20];
-    colorCounts.forEach((count) => {
+    let colorCounts = [
+        2,
+        3,
+        5,
+        7,
+        10,
+        20
+    ];
+    colorCounts.forEach( ( count ) => {
         let start = Date.now();
-        let result = colorThief.getPalette(image, count);
+        let result = colorThief.getPalette( image, count );
         let elapsedTime = Date.now() - start;
-        paletteHTML += Mustache.to_html(document.getElementById('palette-tpl').innerHTML, {
+        paletteHTML += Mustache.render( document.getElementById( 'palette-tpl' ).innerHTML, {
             count,
-            palette: result,
-            paletteStr: result.toString(),
+            'palette': result,
+            'paletteStr': result.toString(),
             elapsedTime
-        })
-    });
+        } );
+    } );
 
-    const outputEl = section.querySelector('.output');
+    const outputEl = section.querySelector( '.output' );
     outputEl.innerHTML += colorHTML + paletteHTML;
 };

dist/color-thief-node.cjs

@@ -0,0 +1 @@
+var t=require("ndarray-pixels"),e=require("@lokesh.dhakar/quantize"),n=require("sharp");function r(t){return t&&"object"==typeof t&&"default"in t?t:{default:t}}var o=/*#__PURE__*/r(e),u=/*#__PURE__*/r(n),a=function(e,n,r){void 0===n&&(n=10),void 0===r&&(r=10);var a=function(t){var e=t.colorCount,n=t.quality;if(void 0!==e&&Number.isInteger(e)){if(1===e)throw new Error("colorCount should be between 2 and 20. To get one color, call getColor() instead of getPalette()");e=Math.max(e,2),e=Math.min(e,20)}else e=10;return(void 0===n||!Number.isInteger(n)||n<1)&&(n=10),{colorCount:e,quality:n}}({colorCount:n,quality:r});return new Promise(function(n,r){(function(e){return new Promise(function(n,r){u.default(e).toBuffer().then(function(t){return u.default(t).metadata().then(function(e){return{buffer:t,format:e.format}})}).then(function(e){return t.getPixels(e.buffer,e.format)}).then(n).catch(r)})})(e).then(function(t){var e=t.shape[0]*t.shape[1],r=function(t,e,n){for(var r=[],o=0;o<e;o+=n){var u=4*o,a=t[u+0],i=t[u+1],f=t[u+2],c=t[u+3];(void 0===c||c>=125)&&(a>250&&i>250&&f>250||r.push([a,i,f]))}return r}(Array.from(t.data),e,a.quality),u=o.default(r,a.colorCount),i=u?u.palette():null;n(i)}).catch(function(t){r(t)})})};module.exports={getColor:function(t,e){return void 0===e&&(e=10),new Promise(function(n,r){a(t,5,e).then(function(t){n(t[0])}).catch(function(t){r(t)})})},getPalette:a};

dist/color-thief-node.mjs

@@ -0,0 +1 @@
+import{getPixels as t}from"ndarray-pixels";import o from"@lokesh.dhakar/quantize";import n from"sharp";var r=function(r,e,u){void 0===e&&(e=10),void 0===u&&(u=10);var a=function(t){var o=t.colorCount,n=t.quality;if(void 0!==o&&Number.isInteger(o)){if(1===o)throw new Error("colorCount should be between 2 and 20. To get one color, call getColor() instead of getPalette()");o=Math.max(o,2),o=Math.min(o,20)}else o=10;return(void 0===n||!Number.isInteger(n)||n<1)&&(n=10),{colorCount:o,quality:n}}({colorCount:e,quality:u});return new Promise(function(e,u){(function(o){return new Promise(function(r,e){n(o).toBuffer().then(function(t){return n(t).metadata().then(function(o){return{buffer:t,format:o.format}})}).then(function(o){return t(o.buffer,o.format)}).then(r).catch(e)})})(r).then(function(t){var n=t.shape[0]*t.shape[1],r=function(t,o,n){for(var r=[],e=0;e<o;e+=n){var u=4*e,a=t[u+0],i=t[u+1],f=t[u+2],c=t[u+3];(void 0===c||c>=125)&&(a>250&&i>250&&f>250||r.push([a,i,f]))}return r}(Array.from(t.data),n,a.quality),u=o(r,a.colorCount),i=u?u.palette():null;e(i)}).catch(function(t){u(t)})})};module.exports={getColor:function(t,o){return void 0===o&&(o=10),new Promise(function(n,e){r(t,5,o).then(function(t){n(t[0])}).catch(function(t){e(t)})})},getPalette:r};

dist/color-thief-node.modern.js

@@ -0,0 +1 @@
+import{getPixels as t}from"ndarray-pixels";import e from"@lokesh.dhakar/quantize";import o from"sharp";const r=(r,a=10,n=10)=>{const l=(t=>{let e=t.colorCount,o=t.quality;if(void 0!==e&&Number.isInteger(e)){if(1===e)throw new Error("colorCount should be between 2 and 20. To get one color, call getColor() instead of getPalette()");e=Math.max(e,2),e=Math.min(e,20)}else e=10;return(void 0===o||!Number.isInteger(o)||o<1)&&(o=10),{colorCount:e,quality:o}})({colorCount:a,quality:n});return new Promise((a,n)=>{(e=>new Promise((r,a)=>{o(e).toBuffer().then(t=>o(t).metadata().then(e=>({buffer:t,format:e.format}))).then(({buffer:e,format:o})=>t(e,o)).then(r).catch(a)}))(r).then(t=>{const o=t.shape[0]*t.shape[1],r=((t,e,o)=>{const r=[];for(let a=0;a<e;a+=o){const e=4*a,o=t[e+0],n=t[e+1],l=t[e+2],u=t[e+3];(void 0===u||u>=125)&&(o>250&&n>250&&l>250||r.push([o,n,l]))}return r})(Array.from(t.data),o,l.quality),n=e(r,l.colorCount),u=n?n.palette():null;a(u)}).catch(t=>{n(t)})})};module.exports={getColor:(t,e=10)=>new Promise((o,a)=>{r(t,5,e).then(t=>{o(t[0])}).catch(t=>{a(t)})}),getPalette:r};

dist/color-thief-node.umd.js

@@ -0,0 +1 @@
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(require("ndarray-pixels"),require("@lokesh.dhakar/quantize"),require("sharp")):"function"==typeof define&&define.amd?define(["ndarray-pixels","@lokesh.dhakar/quantize","sharp"],t):t((e||self).ndarrayPixels,e.quantize,e.sharp)}(this,function(e,t,n){function o(e){return e&&"object"==typeof e&&"default"in e?e:{default:e}}var r=/*#__PURE__*/o(t),u=/*#__PURE__*/o(n),a=function(t,n,o){void 0===n&&(n=10),void 0===o&&(o=10);var a=function(e){var t=e.colorCount,n=e.quality;if(void 0!==t&&Number.isInteger(t)){if(1===t)throw new Error("colorCount should be between 2 and 20. To get one color, call getColor() instead of getPalette()");t=Math.max(t,2),t=Math.min(t,20)}else t=10;return(void 0===n||!Number.isInteger(n)||n<1)&&(n=10),{colorCount:t,quality:n}}({colorCount:n,quality:o});return new Promise(function(n,o){(function(t){return new Promise(function(n,o){u.default(t).toBuffer().then(function(e){return u.default(e).metadata().then(function(t){return{buffer:e,format:t.format}})}).then(function(t){return e.getPixels(t.buffer,t.format)}).then(n).catch(o)})})(t).then(function(e){var t=e.shape[0]*e.shape[1],o=function(e,t,n){for(var o=[],r=0;r<t;r+=n){var u=4*r,a=e[u+0],i=e[u+1],f=e[u+2],l=e[u+3];(void 0===l||l>=125)&&(a>250&&i>250&&f>250||o.push([a,i,f]))}return o}(Array.from(e.data),t,a.quality),u=r.default(o,a.colorCount),i=u?u.palette():null;n(i)}).catch(function(e){o(e)})})};module.exports={getColor:function(e,t){return void 0===t&&(t=10),new Promise(function(n,o){a(e,5,t).then(function(e){n(e[0])}).catch(function(e){o(e)})})},getPalette:a}});

dist/color-thief.js

@@ -1,17 +1,40 @@
-const getPixels = require('get-pixels');
-const quantize = require('@lokesh.dhakar/quantize');
-
-function createPixelArray(imgData, pixelCount, quality) {
-    const pixels = imgData;
+/**
+ * Color Thief Node v3.0.0
+ * by Lokesh Dhakar - http://www.lokeshdhakar.com
+ *
+ * Thanks
+ * ------
+ * Nick Rabinowitz - For creating quantize.js.
+ * John Schulz - For clean up and optimization. @JFSIII
+ * Nathan Spady - For adding drag and drop support to the demo page.
+ *
+ * License
+ * -------
+ * Copyright Lokesh Dhakar
+ * Released under the MIT license
+ * https://raw.githubusercontent.com/lokesh/color-thief/master/LICENSE
+ *
+ * @license MIT
+ */
+// Thanks to this PR for the work of migrating to ndarray-pixels pr https://github.com/lokesh/color-thief/pull/254
+import { getPixels } from 'ndarray-pixels';
+import quantize from '@lokesh.dhakar/quantize';
+import sharp from 'sharp';
+/**
+ * Create an array of arrays of pixels from an array of pixels
+ * @param {number[]} pixels An array of pixels
+ * @param {number} pixelCount The total number of pixels
+ * @param {number} quality
+ * @returns {number[][]} Returns an array of arrays of pixel values ([ r, g, b ])
+ */
+const createPixelArray = (pixels, pixelCount, quality) => {
     const pixelArray = [];
-
-    for (let i = 0, offset, r, g, b, a; i < pixelCount; i = i + quality) {
-        offset = i * 4;
-        r = pixels[offset + 0];
-        g = pixels[offset + 1];
-        b = pixels[offset + 2];
-        a = pixels[offset + 3];
-
+    for (let i = 0; i < pixelCount; i = i + quality) {
+        const offset = i * 4;
+        const r = pixels[offset + 0];
+        const g = pixels[offset + 1];
+        const b = pixels[offset + 2];
+        const a = pixels[offset + 3];
         // If pixel is mostly opaque and not white
         if (typeof a === 'undefined' || a >= 125) {
             if (!(r > 250 && g > 250 && b > 250)) {
@@ -20,80 +43,99 @@ function createPixelArray(imgData, pixelCount, quality) {
         }
     }
     return pixelArray;
-}
-
-function validateOptions(options) {
-    let { colorCount, quality } = options;
-
+};
+/**
+ * Validate Color-Thief options
+ * @param {{ colorCount: number; quality: number; }} options The options object
+ * @returns {{ colorCount: number, quality: number }} The same object, but validated
+ */
+const validateOptions = (options) => {
+    let colorCount = options.colorCount;
+    let quality = options.quality;
     if (typeof colorCount === 'undefined' || !Number.isInteger(colorCount)) {
         colorCount = 10;
-    } else if (colorCount === 1 ) {
+    }
+    else if (colorCount === 1) {
         throw new Error('colorCount should be between 2 and 20. To get one color, call getColor() instead of getPalette()');
-    } else {
+    }
+    else {
         colorCount = Math.max(colorCount, 2);
         colorCount = Math.min(colorCount, 20);
     }
-
-    if (typeof quality === 'undefined' || !Number.isInteger(quality) || quality < 1) {
+    if (typeof quality === 'undefined' ||
+        !Number.isInteger(quality) ||
+        quality < 1) {
         quality = 10;
     }
-
     return {
         colorCount,
-        quality
-    }
-}
-
-function loadImg(img) {
+        quality,
+    };
+};
+/**
+ * Load an image from the disk an pre-process
+ * @param {string} img Path to the image on the disk
+ * @returns {Promise<ndarray.NdArray<Uint8Array>>} Returns the pre-processed image
+ */
+const loadImg = (img) => {
     return new Promise((resolve, reject) => {
-        getPixels(img, function(err, data) {
-            if(err) {
-                reject(err)
-            } else {
-                resolve(data);
-            }
-        })
+        sharp(img)
+            .toBuffer()
+            .then((buffer) => sharp(buffer).metadata()
+            .then((metadata) => ({ buffer, 'format': metadata.format })))
+            .then(({ buffer, format }) => getPixels(buffer, format))
+            .then(resolve)
+            .catch(reject);
     });
-}
-
-function getColor(img, quality) {
+};
+/**
+ * Get the dominant color of an image
+ * @param {string} img Path to the image on the disk
+ * @param {number?} quality (Optional) 1 = highest quality, 10 = default. The bigger the number, the
+     * faster a color will be returned but the greater the likelihood that it will not be the visually
+     * most dominant color.
+ * @returns {Promise<ColorThiefResult>} Returns the dominant color
+ */
+const getColor = (img, quality = 10) => {
     return new Promise((resolve, reject) => {
         getPalette(img, 5, quality)
-            .then(palette => {
-                resolve(palette[0]);
-            })
-            .catch(err => {
-                reject(err);
-            })
+            .then((palette) => {
+            resolve(palette[0]);
+        })
+            .catch((err) => {
+            reject(err);
+        });
     });
-
-}
-
-function getPalette(img, colorCount = 10, quality = 10) {
+};
+/**
+ * Get the color palette of an image
+ * @param {string} img Path to the image on the disk
+ * @param {number?} colorCount (Optional) the target amount of colors to try and extract
+ * @param {number?} quality (Optional) 1 = highest quality, 10 = default. The bigger the number, the
+     * faster a color will be returned but the greater the likelihood that it will not be the visually
+     * most dominant color.
+ * @returns {Promise<ColorThiefResult[]>} Returns an array of colors
+ */
+const getPalette = (img, colorCount = 10, quality = 10) => {
     const options = validateOptions({
         colorCount,
-        quality
+        quality,
     });
-
     return new Promise((resolve, reject) => {
         loadImg(img)
-            .then(imgData => {
-                const pixelCount = imgData.shape[0] * imgData.shape[1];
-                const pixelArray = createPixelArray(imgData.data, pixelCount, options.quality);
-
-                const cmap = quantize(pixelArray, options.colorCount);
-                const palette = cmap? cmap.palette() : null;
-
-                resolve(palette);
-            })
-            .catch(err => {
-                reject(err);
-            })
+            .then((imgData) => {
+            const pixelCount = imgData.shape[0] * imgData.shape[1];
+            const pixelArray = createPixelArray(Array.from(imgData.data), pixelCount, options.quality);
+            const cmap = quantize(pixelArray, options.colorCount);
+            const palette = cmap ? cmap.palette() : null;
+            resolve(palette);
+        })
+            .catch((err) => {
+            reject(err);
+        });
     });
-}
-
+};
 module.exports = {
     getColor,
-    getPalette
+    getPalette,
 };
-

dist/color-thief.umd.js.map

@@ -1 +0,0 @@
-{"version":3,"file":"color-thief.umd.js","sources":["../build/build.js"],"sourcesContent":["var fs = require('fs');\r\nconst { resolve } = require('path');\r\n\r\n/*\r\ncolor-thief.umd.js duplicated as color-thief.min.js for legacy support\r\n\r\nIn Color Thief v2.1 <= there was one distribution file (dist/color-thief.min.js)\r\nand it exposed a global variable ColorThief. Starting from v2.2, the package\r\nincludes multiple dist files for the various module systems. One of these is\r\nthe UMD format which falls back to a global variable if the requirejs AMD format\r\nis not being used. This file is called color-thief.umd.js in the dist folder. We\r\nwant to keep supporting the previous users who were loading\r\ndist/color-thief.min.js and expecting a global var. For this reason we're\r\nduplicating the UMD compatible file and giving it that name.\r\n*/\r\n\r\nconst umdRelPath = 'dist/color-thief.umd.js';\r\nconst legacyRelPath = 'dist/color-thief.min.js';\r\n\r\nconst umdPath = resolve(process.cwd(), umdRelPath);\r\nconst legacyPath = resolve(process.cwd(), legacyRelPath);\r\n\r\nfs.copyFile(umdPath, legacyPath, (err) => {\r\n    if (err) throw err;\r\n    console.log(`${umdRelPath} copied to ${legacyRelPath}.`);\r\n});\r\n\r\nconst srcNodeRelPath = 'src/color-thief-node.js';\r\nconst distNodeRelPath = 'dist/color-thief.js';\r\nconst srcNodePath = resolve(process.cwd(), srcNodeRelPath);\r\nconst distNodePath = resolve(process.cwd(), distNodeRelPath);\r\n\r\nfs.copyFile(srcNodePath, distNodePath, (err) => {\r\n    if (err) throw err;\r\n    console.log(`${srcNodeRelPath} copied to ${distNodeRelPath}.`);\r\n});\r\n"],"names":["fs","require","umdPath","resolve","process","cwd","legacyPath","copyFile","err","console","log","const","srcNodePath","distNodePath"],"mappings":"0IAAA,IAAIA,EAAKC,QAAQ,QACGA,QAAQ,gBAkBtBC,EAAUC,EAAQC,QAAQC,MAHb,2BAIbC,EAAaH,EAAQC,QAAQC,MAHb,2BAKtBL,EAAGO,SAASL,EAASI,WAAaE,MAC1BA,EAAK,MAAMA,EACfC,QAAQC,oEAGZC,IAEMC,EAAcT,EAAQC,QAAQC,MAFb,2BAGjBQ,EAAeV,EAAQC,QAAQC,MAFb,uBAIxBL,EAAGO,SAASK,EAAaC,WAAeL,MAChCA,EAAK,MAAMA,EACfC,QAAQC"}

dist/core.cjs

@@ -0,0 +1 @@
+module.exports={createPixelArray:function(e,o,r){for(var t=[],n=0;n<o;n+=r){var a=4*n,i=e[a+0],l=e[a+1],u=e[a+2],c=e[a+3];(void 0===c||c>=125)&&(i>250&&l>250&&u>250||t.push([i,l,u]))}return t},validateOptions:function(e){var o=e.colorCount,r=e.quality;if(void 0!==o&&Number.isInteger(o)){if(1===o)throw new Error("colorCount should be between 2 and 20. To get one color, call getColor() instead of getPalette()");o=Math.max(o,2),o=Math.min(o,20)}else o=10;return(void 0===r||!Number.isInteger(r)||r<1)&&(r=10),{colorCount:o,quality:r}}};

dist/core.mjs

@@ -0,0 +1 @@
+var e={createPixelArray:function(e,o,r){for(var t=[],a=0;a<o;a+=r){var n=4*a,i=e[n+0],l=e[n+1],u=e[n+2],c=e[n+3];(void 0===c||c>=125)&&(i>250&&l>250&&u>250||t.push([i,l,u]))}return t},validateOptions:function(e){var o=e.colorCount,r=e.quality;if(void 0!==o&&Number.isInteger(o)){if(1===o)throw new Error("colorCount should be between 2 and 20. To get one color, call getColor() instead of getPalette()");o=Math.max(o,2),o=Math.min(o,20)}else o=10;return(void 0===r||!Number.isInteger(r)||r<1)&&(r=10),{colorCount:o,quality:r}}};export{e as default};

dist/core.modern.js

@@ -0,0 +1 @@
+var e={createPixelArray:(e,t,o)=>{const r=[];for(let l=0;l<t;l+=o){const t=4*l,o=e[t+0],a=e[t+1],n=e[t+2],i=e[t+3];(void 0===i||i>=125)&&(o>250&&a>250&&n>250||r.push([o,a,n]))}return r},validateOptions:e=>{let t=e.colorCount,o=e.quality;if(void 0!==t&&Number.isInteger(t)){if(1===t)throw new Error("colorCount should be between 2 and 20. To get one color, call getColor() instead of getPalette()");t=Math.max(t,2),t=Math.min(t,20)}else t=10;return(void 0===o||!Number.isInteger(o)||o<1)&&(o=10),{colorCount:t,quality:o}}};export{e as default};

dist/core.umd.js

@@ -0,0 +1 @@
+!function(e,o){"object"==typeof exports&&"undefined"!=typeof module?module.exports=o():"function"==typeof define&&define.amd?define(o):(e||self).ColorThief=o()}(this,function(){return{createPixelArray:function(e,o,t){for(var n=[],r=0;r<o;r+=t){var i=4*r,l=e[i+0],u=e[i+1],f=e[i+2],a=e[i+3];(void 0===a||a>=125)&&(l>250&&u>250&&f>250||n.push([l,u,f]))}return n},validateOptions:function(e){var o=e.colorCount,t=e.quality;if(void 0!==o&&Number.isInteger(o)){if(1===o)throw new Error("colorCount should be between 2 and 20. To get one color, call getColor() instead of getPalette()");o=Math.max(o,2),o=Math.min(o,20)}else o=10;return(void 0===t||!Number.isInteger(t)||t<1)&&(t=10),{colorCount:o,quality:t}}}});

eslint.config.mjs

@@ -1,75 +1,65 @@
-import stylisticTS from '@stylistic/eslint-plugin';
+// @ts-check
 
-export default [
-    {   
-        plugins: {
-            '@stylistic/ts': stylisticTS,
-        },
-        languageOptions: {
-            ecmaVersion: 6,
-            sourceType: 'module',
-        },
-        rules: {
-            // Error prevention
-            'prefer-const': 'error',
-            'no-async-promise-executor': 'error',
-            'no-cond-assign': 'error',
-            'no-const-assign': 'error',
-            'no-constant-condition': 'error',
-            'no-debugger': 'error',
-            'no-dupe-else-if': 'error',
-            'no-dupe-keys': 'warn',
-            'no-dupe-class-members': 'error',
-            'no-dupe-args': 'error',
-            'no-duplicate-case': 'error',
-            'no-duplicate-imports': 'error',
-            'no-empty-pattern': 'error',
-            'no-fallthrough': 'error',
-            'no-invalid-regexp': 'warn',
-            'no-loss-of-precision': 'warn',
-            'no-import-assign': 'error',
-            'no-irregular-whitespace': 'error',
-            'no-self-assign': 'error',
-            'no-undef': 'warn',
-            'no-unreachable': 'error',
-            'no-unsafe-finally': 'error',
-            'no-unsafe-negation': 'error',
-            'no-unused-private-class-members': 'warn',
-            'no-unused-vars': 'error',
-            'no-use-before-define': 'error',
-            
-            // Style
-            'arrow-body-style': [ 'error', 'always' ],
-            'camelcase': 'warn',
-            'curly': [ 'error', 'all' ],
-            'eqeqeq': [ 'error', 'always' ],
-            'func-style': [ 'error', 'expression' ],
-            'no-array-constructor': 'error',
-            'no-else-return': 'error',
-            'no-empty': 'warn',
-            'no-empty-static-block': 'warn',
-            'no-eval': 'error',
-            'no-implicit-coercion': 'error',
-            'no-invalid-this': 'warn',
-            'no-multi-assign': 'warn',
-            'no-new': 'error',
-            'no-redeclare': 'error',
-            'no-script-url': 'error',
-            'no-shadow': 'error',
-            'no-shadow-restricted-names': 'error',
-            'no-underscore-dangle': 'warn',
-            'no-unused-expressions': 'warn',
-            'no-useless-constructor': 'warn',
-            'no-var': 'warn',
-            'prefer-arrow-callback': 'error',
-            'prefer-exponentiation-operator': 'warn',
-            'prefer-numeric-literals': 'error',
-            'require-await': 'warn',
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+import stylistic from '@stylistic/eslint-plugin';
 
+export default tseslint.config(
+    eslint.configs.recommended,
+    ...tseslint.configs.recommended,
+    {
+        'plugins': {
+            '@stylistic/js': stylistic,
+            '@stylistic/ts': stylistic,
+        },
+        'rules': {
             // Formatting
-            // https://eslint.style/rules/js/array-bracket-newline
-            // TODO: Finish up
-            '@stylistic/ts/indent': [ 'error', 4 ]
+            '@stylistic/js/array-bracket-newline': [ 'error', { 'multiline': true, 'minItems': 4 } ],
+            '@stylistic/js/array-bracket-spacing': [ 'error', 'always' ],
+            '@stylistic/js/array-element-newline': [ 'error', { 'multiline': true, 'minItems': 4 } ],
+            '@stylistic/js/arrow-parens': [ 'error', 'always' ],
+            '@stylistic/js/arrow-spacing': [ 'error', { 'before': true, 'after': true } ],
+            '@stylistic/js/block-spacing': [ 'error', 'always' ],
+            '@stylistic/js/brace-style': [ 'error', '1tbs' ],
+            '@stylistic/js/comma-spacing': [ 'error', { 'before': false, 'after': true } ],
+            '@stylistic/js/comma-style': [ 'error', 'last' ],
+            '@stylistic/js/dot-location': [ 'error', 'property' ],
+            '@stylistic/js/eol-last': [ 'error', 'always' ],
+            '@stylistic/js/function-call-spacing': [ 'error', 'never' ],
+            '@stylistic/js/implicit-arrow-linebreak': [ 'error', 'beside' ],
+            '@stylistic/js/indent': [ 'error', 4 ],
+            '@stylistic/js/key-spacing': [ 'error', { 'beforeColon': false, 'afterColon': true } ],
+            '@stylistic/js/keyword-spacing': [ 'error', { 'before': true, 'after': true } ],
+            '@stylistic/js/lines-between-class-members': [ 'error', 'always' ],
+            '@stylistic/js/new-parens': [ 'error', 'always' ],
+            '@stylistic/js/no-extra-parens': [ 'error', 'all' ],
+            '@stylistic/js/no-extra-semi': 'error',
+            '@stylistic/js/no-floating-decimal': 'error',
+            '@stylistic/js/no-mixed-operators': 'error',
+            '@stylistic/js/no-mixed-spaces-and-tabs': 'error',
+            '@stylistic/js/no-multi-spaces': 'error',
+            '@stylistic/js/no-trailing-spaces': 'error',
+            '@stylistic/js/no-whitespace-before-property': 'error',
+            '@stylistic/js/object-curly-newline': [ 'error', { 'multiline': true, 'minProperties': 3 } ],
+            '@stylistic/js/object-curly-spacing': [ 'error', 'always' ],
+            '@stylistic/js/one-var-declaration-per-line': 'error',
+            '@stylistic/js/quote-props': [ 'error', 'always' ],
+            '@stylistic/js/quotes': [ 'error', 'single' ],
+            '@stylistic/js/rest-spread-spacing': [ 'error', 'never' ],
+            '@stylistic/js/semi': [ 'error', 'always' ],
+            '@stylistic/js/semi-spacing': [ 'error', { 'before': false, 'after': true } ],
+            '@stylistic/js/semi-style': [ 'error', 'last' ],
+            '@stylistic/js/space-before-blocks': [ 'error', 'always' ],
+            '@stylistic/js/space-before-function-paren': [ 'error', 'always' ],
+            '@stylistic/js/space-in-parens': [ 'error', 'always' ],
+            '@stylistic/js/space-infix-ops': [ 'error', { 'int32Hint': false } ],
+            '@stylistic/js/space-unary-ops': 'error',
+            '@stylistic/js/spaced-comment': [ 'error', 'always' ],
+            '@stylistic/js/switch-colon-spacing': 'error',
+            '@stylistic/js/template-curly-spacing': [ 'error', 'always' ],
+            '@stylistic/js/wrap-iife': [ 'error', 'inside' ],
+            '@stylistic/js/wrap-regex': 'error',
+            '@stylistic/ts/type-annotation-spacing': 'error',
         }
     }
-]
+);

package.json

@@ -16,34 +16,50 @@
         "photo",
         "canvas"
     ],
+    "type": "module",
     "homepage": "http://lokeshdhakar.com/projects/color-thief/",
     "repository": {
         "type": "git",
         "url": "https://github.com/lokesh/color-thief.git"
     },
     "license": "MIT",
-    "source": "src/color-thief.js",
-    "main": "dist/color-thief.js",
-    "module": "dist/color-thief.mjs",
+    "source": "src/color-thief.ts",
+    "main": "dist/color-thief-node.cjs",
+    "browser": {
+        "dist/color-thief.mjs": "dist/color-thief.mjs",
+        "dist/color-thief.js": "dist/color-thief.js"
+    },
+    "module": "dist/color-thief-node.mjs",
     "umd:main": "dist/color-thief.umd.js",
     "amdName": "ColorThief",
     "scripts": {
-        "build": "microbundle --no-sourcemap && node ./build/build.js",
+        "build": "tsc --declaration && microbundle build --no-sourcemap built/*.js && node ./build/build.mjs",
         "watch": "microbundle watch --no-sourcemap",
         "dev": "http-server",
         "test": "mocha && cypress run --config video=false",
-        "test:browser": "./node_modules/.bin/cypress run --headed --browser chrome",
+        "test:browser": "./node_modules/.bin/cypress run --headed",
         "test:node": "mocha",
         "cypress": "./node_modules/.bin/cypress open",
-        "lint": "eslint ./src && prettier ./src"
+        "lint": "eslint ./src/*"
     },
     "devDependencies": {
+        "@eslint/js": "^9.5.0",
         "@stylistic/eslint-plugin": "^2.3.0",
+        "@types/eslint__js": "^8.42.3",
+        "chai": "^5.1.1",
+        "chai-as-promised": "^8.0.0",
         "cypress": "^13.12.0",
-        "eslint": "^8.40.0"
+        "eslint": "^8.57.0",
+        "http-server": "^14.1.1",
+        "microbundle": "^0.15.1",
+        "mocha": "^10.5.2",
+        "mustache": "^4.2.0",
+        "typescript": "^5.5.2",
+        "typescript-eslint": "^7.14.1"
     },
     "dependencies": {
         "@lokesh.dhakar/quantize": "^1.3.0",
-        "ndarray-pixels": "^4.1.0"
+        "ndarray-pixels": "^4.1.0",
+        "sharp": "^0.33.4"
     }
 }

src/color-thief-node.js

@@ -1,108 +0,0 @@
-// TODO: Update using this pr https://github.com/lokesh/color-thief/pull/254
-const getPixels = require('get-pixels');
-const quantize = require('@lokesh.dhakar/quantize');
-
-function createPixelArray(imgData, pixelCount, quality) {
-    const pixels = imgData;
-    const pixelArray = [];
-
-    for (let i = 0, offset, r, g, b, a; i < pixelCount; i = i + quality) {
-        offset = i * 4;
-        r = pixels[offset + 0];
-        g = pixels[offset + 1];
-        b = pixels[offset + 2];
-        a = pixels[offset + 3];
-
-        // If pixel is mostly opaque and not white
-        if (typeof a === 'undefined' || a >= 125) {
-            if (!(r > 250 && g > 250 && b > 250)) {
-                pixelArray.push([r, g, b]);
-            }
-        }
-    }
-    return pixelArray;
-}
-
-function validateOptions(options) {
-    let { colorCount, quality } = options;
-
-    if (typeof colorCount === 'undefined' || !Number.isInteger(colorCount)) {
-        colorCount = 10;
-    } else if (colorCount === 1) {
-        throw new Error(
-            'colorCount should be between 2 and 20. To get one color, call getColor() instead of getPalette()',
-        );
-    } else {
-        colorCount = Math.max(colorCount, 2);
-        colorCount = Math.min(colorCount, 20);
-    }
-
-    if (
-        typeof quality === 'undefined' ||
-        !Number.isInteger(quality) ||
-        quality < 1
-    ) {
-        quality = 10;
-    }
-
-    return {
-        colorCount,
-        quality,
-    };
-}
-
-function loadImg(img) {
-    return new Promise((resolve, reject) => {
-        getPixels(img, function (err, data) {
-            if (err) {
-                reject(err);
-            } else {
-                resolve(data);
-            }
-        });
-    });
-}
-
-function getColor(img, quality) {
-    return new Promise((resolve, reject) => {
-        getPalette(img, 5, quality)
-            .then((palette) => {
-                resolve(palette[0]);
-            })
-            .catch((err) => {
-                reject(err);
-            });
-    });
-}
-
-function getPalette(img, colorCount = 10, quality = 10) {
-    const options = validateOptions({
-        colorCount,
-        quality,
-    });
-
-    return new Promise((resolve, reject) => {
-        loadImg(img)
-            .then((imgData) => {
-                const pixelCount = imgData.shape[0] * imgData.shape[1];
-                const pixelArray = createPixelArray(
-                    imgData.data,
-                    pixelCount,
-                    options.quality,
-                );
-
-                const cmap = quantize(pixelArray, options.colorCount);
-                const palette = cmap ? cmap.palette() : null;
-
-                resolve(palette);
-            })
-            .catch((err) => {
-                reject(err);
-            });
-    });
-}
-
-module.exports = {
-    getColor,
-    getPalette,
-};

src/color-thief-node.ts

@@ -0,0 +1,169 @@
+/**
+ * Color Thief Node v3.0.0
+ * by Lokesh Dhakar - http://www.lokeshdhakar.com
+ *
+ * Thanks
+ * ------
+ * Nick Rabinowitz - For creating quantize.js.
+ * John Schulz - For clean up and optimization. @JFSIII
+ * Nathan Spady - For adding drag and drop support to the demo page.
+ *
+ * License
+ * -------
+ * Copyright Lokesh Dhakar
+ * Released under the MIT license
+ * https://raw.githubusercontent.com/lokesh/color-thief/master/LICENSE
+ *
+ * @license MIT
+ */
+
+// Thanks to this PR for the work of migrating to ndarray-pixels pr https://github.com/lokesh/color-thief/pull/254
+import { getPixels } from 'ndarray-pixels';
+import quantize from '@lokesh.dhakar/quantize';
+import sharp from 'sharp';
+import ndarray from 'ndarray';
+
+interface ColorThiefResult {
+    'r': number;
+    'g': number;
+    'b': number;
+}
+
+/**
+ * Create an array of arrays of pixels from an array of pixels
+ * @param {number[]} pixels An array of pixels
+ * @param {number} pixelCount The total number of pixels
+ * @param {number} quality
+ * @returns {number[][]} Returns an array of arrays of pixel values ([ r, g, b ])
+ */
+const createPixelArray = ( pixels: number[], pixelCount: number, quality: number ): number[][] => {
+    const pixelArray: number[][] = [];
+
+    for ( let i = 0; i < pixelCount; i = i + quality ) {
+        const offset = i * 4;
+        const r = pixels[ offset + 0 ];
+        const g = pixels[ offset + 1 ];
+        const b = pixels[ offset + 2 ];
+        const a = pixels[ offset + 3 ];
+
+        // If pixel is mostly opaque and not white
+        if ( typeof a === 'undefined' || a >= 125 ) {
+            if ( !( r > 250 && g > 250 && b > 250 ) ) {
+                pixelArray.push( [ r, g, b ] );
+            }
+        }
+    }
+    return pixelArray;
+};
+
+/**
+ * Validate Color-Thief options
+ * @param {{ colorCount: number; quality: number; }} options The options object
+ * @returns {{ colorCount: number, quality: number }} The same object, but validated
+ */
+const validateOptions = ( options: { 'colorCount': number; 'quality': number; } ): { 'colorCount': number; 'quality': number; } => {
+    let colorCount = options.colorCount;
+    let quality = options.quality;
+
+    if ( typeof colorCount === 'undefined' || !Number.isInteger( colorCount ) ) {
+        colorCount = 10;
+    } else if ( colorCount === 1 ) {
+        throw new Error(
+            'colorCount should be between 2 and 20. To get one color, call getColor() instead of getPalette()',
+        );
+    } else {
+        colorCount = Math.max( colorCount, 2 );
+        colorCount = Math.min( colorCount, 20 );
+    }
+
+    if (
+        typeof quality === 'undefined' ||
+        !Number.isInteger( quality ) ||
+        quality < 1
+    ) {
+        quality = 10;
+    }
+
+    return {
+        colorCount,
+        quality,
+    };
+};
+
+/**
+ * Load an image from the disk an pre-process
+ * @param {string} img Path to the image on the disk
+ * @returns {Promise<ndarray.NdArray<Uint8Array>>} Returns the pre-processed image
+ */
+const loadImg = ( img: string ): Promise<ndarray.NdArray<Uint8Array>> => {
+    return new Promise( ( resolve, reject ) => {
+        sharp( img )
+            .toBuffer()
+            .then( ( buffer ) => sharp( buffer ).metadata()
+                .then( ( metadata ) => ( { buffer, 'format': metadata.format } ) ) )
+            .then( ( { buffer, format } ) => getPixels( buffer, format ) )
+            .then( resolve )
+            .catch( reject );
+    } );
+};
+
+/**
+ * Get the dominant color of an image
+ * @param {string} img Path to the image on the disk
+ * @param {number?} quality (Optional) 1 = highest quality, 10 = default. The bigger the number, the
+     * faster a color will be returned but the greater the likelihood that it will not be the visually
+     * most dominant color.
+ * @returns {Promise<ColorThiefResult>} Returns the dominant color
+ */
+const getColor = ( img: string, quality: number = 10 ): Promise<ColorThiefResult> => {
+    return new Promise( ( resolve, reject ) => {
+        getPalette( img, 5, quality )
+            .then( ( palette ) => {
+                resolve( palette[0] );
+            } )
+            .catch( ( err ) => {
+                reject( err );
+            } );
+    } );
+};
+
+/**
+ * Get the color palette of an image
+ * @param {string} img Path to the image on the disk
+ * @param {number?} colorCount (Optional) the target amount of colors to try and extract
+ * @param {number?} quality (Optional) 1 = highest quality, 10 = default. The bigger the number, the
+     * faster a color will be returned but the greater the likelihood that it will not be the visually
+     * most dominant color.
+ * @returns {Promise<ColorThiefResult[]>} Returns an array of colors
+ */
+const getPalette = ( img: string, colorCount: number = 10, quality: number = 10 ): Promise<ColorThiefResult[]> => {
+    const options = validateOptions( {
+        colorCount,
+        quality,
+    } );
+
+    return new Promise( ( resolve, reject ) => {
+        loadImg( img )
+            .then( ( imgData ) => {
+                const pixelCount = imgData.shape[0] * imgData.shape[1];
+                const pixelArray = createPixelArray(
+                    Array.from( imgData.data ),
+                    pixelCount,
+                    options.quality,
+                );
+
+                const cmap = quantize( pixelArray, options.colorCount );
+                const palette = cmap ? cmap.palette() : null;
+
+                resolve( palette );
+            } )
+            .catch( ( err ) => {
+                reject( err );
+            } );
+    } );
+};
+
+module.exports = {
+    getColor,
+    getPalette,
+};

src/color-thief.js

@@ -1,147 +0,0 @@
-import quantize from '../node_modules/@lokesh.dhakar/quantize/dist/index.mjs';
-import core from './core.js';
-
-/*
- * Color Thief v2.4.0
- * by Lokesh Dhakar - http://www.lokeshdhakar.com
- *
- * Thanks
- * ------
- * Nick Rabinowitz - For creating quantize.js.
- * John Schulz - For clean up and optimization. @JFSIII
- * Nathan Spady - For adding drag and drop support to the demo page.
- *
- * License
- * -------
- * Copyright Lokesh Dhakar
- * Released under the MIT license
- * https://raw.githubusercontent.com/lokesh/color-thief/master/LICENSE
- *
- * @license
- */
-
-/*
-  CanvasImage Class
-  Class that wraps the html image element and canvas.
-  It also simplifies some of the canvas context manipulation
-  with a set of helper functions.
-*/
-
-const CanvasImage = function (image) {
-    this.canvas = document.createElement('canvas');
-    this.context = this.canvas.getContext('2d');
-    this.width = this.canvas.width = image.naturalWidth;
-    this.height = this.canvas.height = image.naturalHeight;
-    this.context.drawImage(image, 0, 0, this.width, this.height);
-};
-
-CanvasImage.prototype.getImageData = function () {
-    return this.context.getImageData(0, 0, this.width, this.height);
-};
-
-var ColorThief = function () {};
-
-/*
- * getColor(sourceImage[, quality])
- * returns {r: num, g: num, b: num}
- *
- * Use the median cut algorithm provided by quantize.js to cluster similar
- * colors and return the base color from the largest cluster.
- *
- * Quality is an optional argument. It needs to be an integer. 1 is the highest quality settings.
- * 10 is the default. There is a trade-off between quality and speed. The bigger the number, the
- * faster a color will be returned but the greater the likelihood that it will not be the visually
- * most dominant color.
- *
- * */
-ColorThief.prototype.getColor = function (sourceImage, quality = 10) {
-    const palette = this.getPalette(sourceImage, 5, quality);
-    const dominantColor = palette[0];
-    return dominantColor;
-};
-
-/*
- * getPalette(sourceImage[, colorCount, quality])
- * returns array[ {r: num, g: num, b: num}, {r: num, g: num, b: num}, ...]
- *
- * Use the median cut algorithm provided by quantize.js to cluster similar colors.
- *
- * colorCount determines the size of the palette; the number of colors returned. If not set, it
- * defaults to 10.
- *
- * quality is an optional argument. It needs to be an integer. 1 is the highest quality settings.
- * 10 is the default. There is a trade-off between quality and speed. The bigger the number, the
- * faster the palette generation but the greater the likelihood that colors will be missed.
- *
- *
- */
-ColorThief.prototype.getPalette = function (sourceImage, colorCount, quality) {
-    const options = core.validateOptions({
-        colorCount,
-        quality,
-    });
-
-    // Create custom CanvasImage object
-    const image = new CanvasImage(sourceImage);
-    const imageData = image.getImageData();
-    const pixelCount = image.width * image.height;
-
-    const pixelArray = core.createPixelArray(
-        imageData.data,
-        pixelCount,
-        options.quality,
-    );
-
-    // Send array to quantize function which clusters values
-    // using median cut algorithm
-    const cmap = quantize(pixelArray, options.colorCount);
-    const palette = cmap ? cmap.palette() : null;
-
-    return palette;
-};
-
-ColorThief.prototype.getColorFromUrl = function (imageUrl, callback, quality) {
-    const sourceImage = document.createElement('img');
-
-    sourceImage.addEventListener('load', () => {
-        const palette = this.getPalette(sourceImage, 5, quality);
-        const dominantColor = palette[0];
-        callback(dominantColor, imageUrl);
-    });
-    sourceImage.src = imageUrl;
-};
-
-ColorThief.prototype.getImageData = function (imageUrl, callback) {
-    let xhr = new XMLHttpRequest();
-    xhr.open('GET', imageUrl, true);
-    xhr.responseType = 'arraybuffer';
-    xhr.onload = function () {
-        if (this.status == 200) {
-            let uInt8Array = new Uint8Array(this.response);
-            i = uInt8Array.length;
-            let binaryString = new Array(i);
-            for (let i = 0; i < uInt8Array.length; i++) {
-                binaryString[i] = String.fromCharCode(uInt8Array[i]);
-            }
-            let data = binaryString.join('');
-            let base64 = window.btoa(data);
-            callback('data:image/png;base64,' + base64);
-        }
-    };
-    xhr.send();
-};
-
-ColorThief.prototype.getColorAsync = function (imageUrl, callback, quality) {
-    const thief = this;
-    this.getImageData(imageUrl, function (imageData) {
-        const sourceImage = document.createElement('img');
-        sourceImage.addEventListener('load', function () {
-            const palette = thief.getPalette(sourceImage, 5, quality);
-            const dominantColor = palette[0];
-            callback(dominantColor, this);
-        });
-        sourceImage.src = imageData;
-    });
-};
-
-export default ColorThief;

src/color-thief.ts

@@ -1,8 +1,8 @@
 import quantize from '../node_modules/@lokesh.dhakar/quantize/dist/index.mjs';
 import core from './core.js';
 
-/*
- * Color Thief v2.4.0
+/**
+ * Color Thief v3.0.0
  * by Lokesh Dhakar - http://www.lokeshdhakar.com
  *
  * Thanks
@@ -17,50 +17,61 @@ import core from './core.js';
  * Released under the MIT license
  * https://raw.githubusercontent.com/lokesh/color-thief/master/LICENSE
  *
- * @license
+ * @license MIT
  */
 
-/*
-  CanvasImage Class
-  Class that wraps the html image element and canvas.
+/**
+  @class CanvasImage that wraps the html image element and canvas.
   It also simplifies some of the canvas context manipulation
   with a set of helper functions.
 */
+class CanvasImage {
+    canvas: HTMLCanvasElement;
 
-const CanvasImage = function (image: HTMLImageElement) {
-    this.canvas = document.createElement('canvas');
-    this.context = this.canvas.getContext('2d');
-    this.width = this.canvas.width = image.naturalWidth;
-    this.height = this.canvas.height = image.naturalHeight;
-    this.context.drawImage(image, 0, 0, this.width, this.height);
-};
+    context: CanvasRenderingContext2D;
 
-CanvasImage.prototype.getImageData = function () {
-    return this.context.getImageData(0, 0, this.width, this.height);
-};
+    width: number;
 
-interface ColorThiefResult {
-    r: number;
-    g: number;
-    b: number;
+    height: number;
+
+    constructor ( image: HTMLImageElement ) {
+        this.canvas = document.createElement( 'canvas' );
+        this.context = this.canvas.getContext( '2d' );
+        this.width = this.canvas.width = image.naturalWidth;
+        this.height = this.canvas.height = image.naturalHeight;
+        this.context.drawImage( image, 0, 0, this.width, this.height );
+    }
+
+    getImageData = function () {
+        return this.context.getImageData( 0, 0, this.width, this.height );
+    };
 }
 
+
+interface ColorThiefResult {
+    'r': number;
+    'g': number;
+    'b': number;
+}
+
+/**
+ * @class The main ColorThief class
+ */
 class ColorThief {
     /**
      * Use the median cut algorithm provided by quantize.js to cluster similar
      * colors and return the base color from the largest cluster.
      * @param {HTMLImageElement} sourceImage:HTMLImageElement
-     * @param {number} quality Quality is an optional argument. It needs to be an integer. 1 is the highest quality settings.
-     * 10 is the default. There is a trade-off between quality and speed. The bigger the number, the
+     * @param {number?} quality (Optional) 1 = highest quality, 10 = default. The bigger the number, the
      * faster a color will be returned but the greater the likelihood that it will not be the visually
      * most dominant color.
      * @returns {ColorThiefResult} returns {r: num, g: num, b: num}
      */
-    getColor(
+    getColor (
         sourceImage: HTMLImageElement,
         quality: number = 10,
     ): ColorThiefResult {
-        const palette = this.getPalette(sourceImage, 5, quality);
+        const palette = this.getPalette( sourceImage, 5, quality );
         return palette[0];
     }
 
@@ -69,23 +80,23 @@ class ColorThief {
      * @param {HTMLImageElement} sourceImage The image you want to have processed, as an HTMLImageElement
      * @param {number?} colorCount colorCount determines the size of the palette; the number of colors returned. If not set, it
      * defaults to 10.
-     * @param {number?} quality quality is an optional argument. It needs to be an integer. 1 is the highest quality settings.
-     * 10 is the default. There is a trade-off between quality and speed. The bigger the number, the
-     * faster the palette generation but the greater the likelihood that colors will be missed.
-     * @returns {ColorThiefResult[]} returns array[ {r: num, g: num, b: num}, {r: num, g: num, b: num}, ...]
+     * @param {number?} quality (Optional) 1 = highest quality, 10 = default. The bigger the number, the
+     * faster a color will be returned but the greater the likelihood that it will not be the visually
+     * most dominant color.
+     * @returns {ColorThiefResult[] | null} returns array[ {r: num, g: num, b: num}, {r: num, g: num, b: num}, ...]
      */
-    getPalette(
+    getPalette (
         sourceImage: HTMLImageElement,
         colorCount?: number,
         quality: number = 10,
-    ): ColorThiefResult[] {
-        const options = core.validateOptions({
+    ): ColorThiefResult[] | null {
+        const options = core.validateOptions( {
             colorCount,
             quality,
-        });
+        } );
 
         // Create custom CanvasImage object
-        const image = new CanvasImage(sourceImage);
+        const image = new CanvasImage( sourceImage );
         const imageData = image.getImageData();
         const pixelCount = image.width * image.height;
 
@@ -97,83 +108,127 @@ class ColorThief {
 
         // Send array to quantize function which clusters values
         // using median cut algorithm
-        const cmap = quantize(pixelArray, options.colorCount);
-        const palette = cmap ? cmap.palette() : null;
+        const cmap = quantize( pixelArray, options.colorCount );
+        const palette: null | ColorThiefResult[] = cmap ? cmap.palette() : null;
 
         return palette;
     }
 
     /**
-     * Description
-     * @param {any} imageUrl
-     * @param {any} callback
-     * @param {any} quality
-     * @returns {any}
+     * [ DEPRECATED ] Get the dominant color of an image, which is fetched from a URL.
+     * @param {string} imageUrl
+     * @param {( color: ColorThiefResult, url: string ) => void} callback The callback function called when the image has finished processing
+     * @param {number?} quality (Optional) 1 = highest quality, 10 = default. The bigger the number, the
+     * faster a color will be returned but the greater the likelihood that it will not be the visually
+     * most dominant color.
+     * @returns {void}
+     * @deprecated since Version 3.0, use getColorFromURLPromise instead
      */
-    getColorFromUrl(imageUrl, callback, quality) {
-        const sourceImage = document.createElement('img');
+    getColorFromUrl ( imageUrl: string, callback: ( color: ColorThiefResult, url: string ) => void, quality: number = 10 ): void {
+        const sourceImage = document.createElement( 'img' );
 
-        sourceImage.addEventListener('load', () => {
-            const palette = this.getPalette(sourceImage, 5, quality);
+        sourceImage.addEventListener( 'load', () => {
+            const palette = this.getPalette( sourceImage, 5, quality );
             const dominantColor = palette[0];
-            callback(dominantColor, imageUrl);
-        });
+            callback( dominantColor, imageUrl );
+        } );
         sourceImage.src = imageUrl;
     }
 
     /**
-     * Description
-     * @param {string} imageUrl
-     * @param {string} callback
+     * [ DEPRECATED ] Get Image Data as a Base64 string from a URL
+     * @param {string} imageUrl The URL to the image. Has to be a full URL, if not relative
+     * @param {( data: string ) => void} callback The callback function called, once download is complete. Will only be called if successful at downloading
      * @returns {void}
+     * @deprecated since Version 3.0, use getImageDataFromURL instead
      */
-    getImageData(imageUrl: string, callback) {
-        let xhr = new XMLHttpRequest();
-        xhr.open('GET', imageUrl, true);
-        xhr.responseType = 'arraybuffer';
-
-        fetch(imageUrl).then((res) => {
-            if (res.status === 200) {
-                res.arrayBuffer().then((response) => {
-                    const uInt8Array = new Uint8Array(response);
-                    let binaryString = new Array(uInt8Array.length);
-                    for (let i = 0; i < uInt8Array.length; i++) {
-                        binaryString[i] = String.fromCharCode(uInt8Array[i]);
+    getImageData ( imageUrl: string, callback: ( data: string ) => void ): void {
+        fetch( imageUrl ).then( ( res ) => {
+            if ( res.status === 200 ) {
+                res.arrayBuffer().then( ( response ) => {
+                    const uInt8Array = new Uint8Array( response );
+                    const binaryString = new Array( uInt8Array.length );
+                    for ( let i = 0; i < uInt8Array.length; i++ ) {
+                        binaryString[i] = String.fromCharCode( uInt8Array[i] );
                     }
-                    let data = binaryString.join('');
-                    let base64 = window.btoa(data);
-                });
+                    const data = binaryString.join( '' );
+                    callback( 'data:image/png;base64,' + window.btoa( data ) );
+                } );
             }
-        });
-
-        xhr.onload = function () {
-            if (this.status == 200) {
-                let uInt8Array = new Uint8Array(this.response);
-
-                callback('data:image/png;base64,' + base64);
-            }
-        };
-        xhr.send();
+        } );
     }
 
     /**
-     * Description
-     * @param {any} imageUrl
-     * @param {any} callback
-     * @param {any} quality
-     * @returns {any}
+     * Get Image Data as a Base64 string from a URL
+     * @param {string} imageUrl The URL to the image. Has to be a full URL, if not relative
+     * @returns {Promise<string>} returns a Promise resolving to a string with the base64 string
      */
-    getColorAsync = function (imageUrl, callback, quality) {
+    getImageDataFromURL ( imageUrl: string ): Promise<string> {
+        return new Promise( ( resolve, reject ) => {
+            fetch( imageUrl ).then( ( res ) => {
+                if ( res.status === 200 ) {
+                    res.arrayBuffer().then( ( response ) => {
+                        const uInt8Array = new Uint8Array( response );
+                        const binaryString = new Array( uInt8Array.length );
+                        for ( let i = 0; i < uInt8Array.length; i++ ) {
+                            binaryString[i] = String.fromCharCode( uInt8Array[i] );
+                        }
+                        const data = binaryString.join( '' );
+                        resolve( 'data:image/png;base64,' + window.btoa( data ) );
+                    } );
+                } else {
+                    reject( 'ERR_LOADING' );
+                }
+            } );
+        } );
+    }
+
+    /**
+     * [ DEPRECATED ] Same as getColor, but async
+     * @param {string} imageUrl
+     * @param {( data: ColorThiefResult ) => void} callback
+     * @param {number?} quality (Optional) 1 = highest quality, 10 = default. The bigger the number, the
+     * faster a color will be returned but the greater the likelihood that it will not be the visually
+     * most dominant color.
+     * @returns {void}
+     * @deprecated since Version 3.0, in favour of getColorPromise. Only retained for compatibility
+     */
+    getColorAsync = ( imageUrl: string, callback: ( data: ColorThiefResult, img: HTMLImageElement ) => void, quality: number | null ): void => {
+        // eslint-disable-next-line @typescript-eslint/no-this-alias
         const thief = this;
-        this.getImageData(imageUrl, function (imageData) {
-            const sourceImage = document.createElement('img');
-            sourceImage.addEventListener('load', function () {
-                const palette = thief.getPalette(sourceImage, 5, quality);
-                const dominantColor = palette[0];
-                callback(dominantColor, this);
-            });
+        this.getImageDataFromURL( imageUrl ).then( ( imageData ) => {
+            const sourceImage = document.createElement( 'img' );
+            sourceImage.addEventListener( 'load', () => {
+                const palette = thief.getPalette( sourceImage, 5, quality );
+                callback( palette[ 0 ], sourceImage );
+            } );
             sourceImage.src = imageData;
-        });
+        } );
+    };
+
+    /**
+     * Same as getColor, but promise-based
+     * @param {string} imageUrl
+     * @param {number?} quality (Optional) 1 = highest quality, 10 = default. The bigger the number, the
+     * faster a color will be returned but the greater the likelihood that it will not be the visually
+     * most dominant color.
+     * @returns {Promise<{ 'color': ColorThiefResult, 'img': HTMLImageElement }>} Returns a promise resolving to an object containing the color and the image element
+     */
+    getColorPromise = ( imageUrl: string, quality: number | null ): Promise<{ 'color': ColorThiefResult, 'img': HTMLImageElement }> => {
+        return new Promise( ( resolve, reject ) => {
+            // eslint-disable-next-line @typescript-eslint/no-this-alias
+            const thief = this;
+            this.getImageDataFromURL( imageUrl ).then( ( imageData ) => {
+                const sourceImage = document.createElement( 'img' );
+                sourceImage.addEventListener( 'load', () => {
+                    const palette = thief.getPalette( sourceImage, 5, quality );
+                    resolve( { 'color': palette[ 0 ], 'img': sourceImage } );
+                } );
+                sourceImage.src = imageData;
+            } ).catch( ( e ) => {
+                reject( e );
+            } );
+        } );
     };
 }
 

src/core.js

@@ -1,53 +0,0 @@
-function createPixelArray(imgData, pixelCount, quality) {
-    const pixels = imgData;
-    const pixelArray = [];
-
-    for (let i = 0, offset, r, g, b, a; i < pixelCount; i = i + quality) {
-        offset = i * 4;
-        r = pixels[offset + 0];
-        g = pixels[offset + 1];
-        b = pixels[offset + 2];
-        a = pixels[offset + 3];
-
-        // If pixel is mostly opaque and not white
-        if (typeof a === 'undefined' || a >= 125) {
-            if (!(r > 250 && g > 250 && b > 250)) {
-                pixelArray.push([r, g, b]);
-            }
-        }
-    }
-    return pixelArray;
-}
-
-function validateOptions(options) {
-    let { colorCount, quality } = options;
-
-    if (typeof colorCount === 'undefined' || !Number.isInteger(colorCount)) {
-        colorCount = 10;
-    } else if (colorCount === 1) {
-        throw new Error(
-            'colorCount should be between 2 and 20. To get one color, call getColor() instead of getPalette()',
-        );
-    } else {
-        colorCount = Math.max(colorCount, 2);
-        colorCount = Math.min(colorCount, 20);
-    }
-
-    if (
-        typeof quality === 'undefined' ||
-        !Number.isInteger(quality) ||
-        quality < 1
-    ) {
-        quality = 10;
-    }
-
-    return {
-        colorCount,
-        quality,
-    };
-}
-
-export default {
-    createPixelArray,
-    validateOptions,
-};

src/core.ts

@@ -0,0 +1,84 @@
+/**
+ * Color Thief Core v3.0.0
+ * by Lokesh Dhakar - http://www.lokeshdhakar.com
+ *
+ * Thanks
+ * ------
+ * Nick Rabinowitz - For creating quantize.js.
+ * John Schulz - For clean up and optimization. @JFSIII
+ * Nathan Spady - For adding drag and drop support to the demo page.
+ *
+ * License
+ * -------
+ * Copyright Lokesh Dhakar
+ * Released under the MIT license
+ * https://raw.githubusercontent.com/lokesh/color-thief/master/LICENSE
+ *
+ * @license MIT
+ */
+
+/**
+ * Create an array of arrays of pixels from an array of pixels
+ * @param {number[]} pixels An array of pixels
+ * @param {number} pixelCount The total number of pixels
+ * @param {number} quality
+ * @returns {number[][]} Returns an array of arrays of pixel values ([ r, g, b ])
+ */
+const createPixelArray = ( pixels: number[], pixelCount: number, quality: number ): number[][] => {
+    const pixelArray: number[][] = [];
+
+    for ( let i = 0; i < pixelCount; i = i + quality ) {
+        const offset = i * 4;
+        const r = pixels[ offset + 0 ];
+        const g = pixels[ offset + 1 ];
+        const b = pixels[ offset + 2 ];
+        const a = pixels[ offset + 3 ];
+
+        // If pixel is mostly opaque and not white
+        if ( typeof a === 'undefined' || a >= 125 ) {
+            if ( !( r > 250 && g > 250 && b > 250 ) ) {
+                pixelArray.push( [ r, g, b ] );
+            }
+        }
+    }
+    return pixelArray;
+};
+
+/**
+ * Validate Color-Thief options
+ * @param {{ colorCount: number; quality: number; }} options The options object
+ * @returns {{ colorCount: number, quality: number }} The same object, but validated
+ */
+const validateOptions = ( options: { 'colorCount': number; 'quality': number; } ): { 'colorCount': number; 'quality': number; } => {
+    let colorCount = options.colorCount;
+    let quality = options.quality;
+
+    if ( typeof colorCount === 'undefined' || !Number.isInteger( colorCount ) ) {
+        colorCount = 10;
+    } else if ( colorCount === 1 ) {
+        throw new Error(
+            'colorCount should be between 2 and 20. To get one color, call getColor() instead of getPalette()',
+        );
+    } else {
+        colorCount = Math.max( colorCount, 2 );
+        colorCount = Math.min( colorCount, 20 );
+    }
+
+    if (
+        typeof quality === 'undefined' ||
+        !Number.isInteger( quality ) ||
+        quality < 1
+    ) {
+        quality = 10;
+    }
+
+    return {
+        colorCount,
+        quality,
+    };
+};
+
+export default {
+    createPixelArray,
+    validateOptions,
+};

test/node-test.js

@@ -1,24 +1,24 @@
-const { resolve } = require('path');
-const ColorThief = require(resolve(process.cwd(), "dist/color-thief.js"));
-const img = resolve(process.cwd(), 'cypress/test-pages/img/rainbow-vertical.png');
-const chai = require("chai");
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
+import { resolve } from 'path';
+import ColorThief from '../dist/color-thief-node.cjs';
+const img = resolve( process.cwd(), 'cypress/test-pages/img/rainbow-vertical.png' );
+import { expect as _expect, use } from 'chai';
+const expect = _expect;
+import chaiAsPromised from 'chai-as-promised';
+use( chaiAsPromised );
 
+describe( 'getColor()', function () {
+    it( 'returns valid color', function () {
+        return expect( ColorThief.getColor( img ) ).to.eventually.have.lengthOf( 3 );
+    } );
+} );
 
-describe('getColor()', function() {
-    it('returns valid color', function() {
-        return expect(ColorThief.getColor(img)).to.eventually.have.lengthOf(3);
-    });
-});
+describe( 'getPalette()', function () {
+    it( 'returns 5 colors when colorCount set to 5', function () {
+        return expect( ColorThief.getPalette( img, 5 ) ).to.eventually.have.lengthOf( 5 );
+    } );
 
-describe('getPalette()', function() {
-    it('returns 5 colors when colorCount set to 5', function() {
-        return expect(ColorThief.getPalette(img, 5)).to.eventually.have.lengthOf(5);
-    });
-
-    it('returns 9 colors when colorCount set to 9', function() {
-        return expect(ColorThief.getPalette(img, 9)).to.eventually.have.lengthOf(9);
-    });
-});
+    it( 'returns 9 colors when colorCount set to 9', function () {
+        return expect( ColorThief.getPalette( img, 9 ) ).to.eventually.have.lengthOf( 9 );
+    } );
+} );
 

tsconfig.json

@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "outDir": "./built",
+    "allowJs": true,
+    "target": "ES6",
+    "skipLibCheck": true,
+    "moduleResolution": "NodeNext",
+    "module": "NodeNext"
+  },
+  "include": [ "./src/**/*" ],
+}