Add es module

index.es.js

@@ -0,0 +1,35 @@
+import assert from 'www.unpkg.com/nanoassert?module'
+
+var placeholder = {
+  cancel: noop,
+  finish: noop,
+  pause: noop,
+  play: noop,
+  reverse: noop,
+  finished: {
+    then: Promise.resolve  // Animations can be chained with promises or property definitions
+  }
+}
+
+export default function animate (keyframes, timingProperties) {
+  assert.equal(typeof keyframes, 'object', 'nanoanimation: keyframes should be an array or an object')
+  assert.ok(typeof timingProperties === 'object' || typeof timingProperties === 'number', 'nanoanimation: timingProperties should be type object or number')
+
+  return function (element, _done) {
+    var done = _done || noop
+    assert.equal(typeof element, 'object', 'nanoanimation: element should be type object')
+    assert.equal(typeof done, 'function', 'nanoanimation: done should be type function')
+
+    if (typeof window === 'undefined' || !('AnimationEvent' in window)) {
+      done()
+      return placeholder
+    }
+
+    var animation = element.animate(keyframes, timingProperties)
+    animation.pause()
+    animation.onfinish = done
+    return animation
+  }
+}
+
+function noop () {}

package.json

@@ -3,6 +3,8 @@
   "description": "Safety wrapper around the Web Animation API",
   "repository": "choojs/nanoanimation",
   "version": "2.1.0",
+  "main": "index.js",
+  "module": "index.es.js",
   "scripts": {
     "deps": "dependency-check . && dependency-check . --extra --no-dev",
     "start": "node .",