feat: add ESM support

Closes #9, closes #10

.github/workflows/build.yml

@@ -26,6 +26,9 @@ jobs:
       - name: Run unit tests
         run: npm run test:coverage
 
+      - name: Run ES modules tests
+        run: npm run test:module
+
       - name: Build bundle
         run: npm run build
 

index.js

@@ -40,3 +40,4 @@ function StyleToObject(style, iterator) {
 }
 
 module.exports = StyleToObject;
+module.exports.default = StyleToObject; // ESM support

index.mjs

@@ -0,0 +1,3 @@
+import StyleToObject from './index.js';
+
+export default StyleToObject;

package.json

@@ -5,6 +5,11 @@
   "author": "Mark <mark@remarkablemark.org>",
   "main": "index.js",
   "types": "index.d.ts",
+  "module": "index.mjs",
+  "exports": {
+    "import": "./index.mjs",
+    "require": "./index.js"
+  },
   "scripts": {
     "build": "run-s build:*",
     "build:min": "NODE_ENV=production rollup --config --file dist/style-to-object.min.js --sourcemap",
@@ -16,9 +21,10 @@
     "postinstall": "husky install",
     "postpublish": "pinst --enable",
     "prepublishOnly": "pinst --disable && run-s lint lint:dts test clean build",
-    "test": "mocha",
+    "test": "mocha --exclude **/*.mjs",
     "test:coverage": "nyc npm test",
-    "test:watch": "mocha --watch"
+    "test:module": "node --experimental-modules test/index.mjs",
+    "test:watch": "npm run test -- --watch"
   },
   "repository": {
     "type": "git",
@@ -60,7 +66,9 @@
   },
   "files": [
     "/dist",
-    "index.d.ts"
+    "index.d.ts",
+    "index.js",
+    "index.mjs"
   ],
   "license": "MIT"
 }

test/index.mjs

@@ -0,0 +1,5 @@
+import assert from 'assert';
+import StyleToObject from '../index.mjs';
+
+assert.strictEqual(typeof StyleToObject, 'function');
+assert.deepEqual(StyleToObject('foo: bar'), { foo: 'bar' });