chore: bundle commonjs

package.json

@@ -36,6 +36,7 @@
   "devDependencies": {
     "@commitlint/cli": "^11.0.0",
     "@commitlint/config-conventional": "^12.0.1",
+    "@rollup/plugin-commonjs": "^19.0.0",
     "@types/benchmark": "^2.1.0",
     "@types/color-string": "^1.5.0",
     "@types/jest": "^26.0.20",
@@ -83,12 +84,12 @@
   "limit-size": [
     {
       "path": "dist/scale.min.js",
-      "limit": "8 Kb",
+      "limit": "10 Kb",
       "gzip": true
     },
     {
       "path": "dist/scale.min.js",
-      "limit": "24 Kb"
+      "limit": "30 Kb"
     }
   ],
   "author": {

rollup.config.js

@@ -1,18 +1,17 @@
+import commonjs from '@rollup/plugin-commonjs';
 import { uglify } from 'rollup-plugin-uglify';
 import resolve from 'rollup-plugin-node-resolve';
 import typescript from 'rollup-plugin-typescript';
 
-module.exports = [{
-  input: 'src/index.ts',
-  output: {
-    file: 'dist/scale.min.js',
-    name: 'Scale',
-    format: 'umd',
-    sourcemap: false,
+module.exports = [
+  {
+    input: 'src/index.ts',
+    output: {
+      file: 'dist/scale.min.js',
+      name: 'Scale',
+      format: 'umd',
+      sourcemap: false,
+    },
+    plugins: [resolve(), typescript(), commonjs(), uglify()],
   },
-  plugins: [
-    resolve(),
-    typescript(),
-    uglify(),
-  ],
-}];
+];

src/utils/color.ts

@@ -1,4 +1,4 @@
-const colorString = require('color-string');
+import colorString from 'color-string';
 
 function hue2rgb(p: number, q: number, m: number) {
   let t = m;