diff --git a/.gitignore b/.gitignore
index 93f1361..1e81a84 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 node_modules
 npm-debug.log
+document-promises.js
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2d13acb..65c8bc9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changes to document-promises
 
+### 2.0.0 (October 25, 2016)
+
+- Re-implemented as a ponyfill
+
 ### 1.0.0 (October 20, 2016)
 
 - Initial version
diff --git a/README.md b/README.md
index 9c1e9de..41af798 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 [![Changelog][log-image]][log-url]
 [![Gitter Chat][git-image]][git-url]
 
-[Document Promises] is a polyfill for [document.interactive], [document.contentLoaded], and [document.loaded] which allow you to run code after specific states of the document.
+[Document Promises] is a ponyfill for [document.interactive], [document.contentLoaded], and [document.loaded] which allow you to run code after specific states of the document.
 
 ```js
 fetch('data.json').then(function (data) {
@@ -28,6 +28,34 @@ fetch('data.json').then(function (data) {
 
 [document.loaded] is a promise that fulfills when the when the document's `readyState` becomes `complete`.
 
+## Usage
+
+[Document Promises] does not attach properties to the document by default, because no browsers have yet implemented this behavior.
+
+Instead, developers may import the features individually.
+
+```js
+// Example ES6 import
+import contentLoaded from 'document-promises';
+
+// Example CommonJS import
+require('document-promises').contentLoaded;
+```
+
+Developers may use the ponyfill as-is immediately.
+
+```js
+contentLoaded.then(function () {
+  /* document is ready */
+});
+```
+
+Developers are strongly advised not to assign these promises to `document`, as the standard may still change substantially, and then such code would be future-incompatible.
+
+```js
+document.contentLoaded = contentLoaded;
+```
+
 ## FAQ
 
 ### What’s the difference between these promises and DOMContentLoaded?
@@ -40,7 +68,7 @@ Using promises for state transitions is much more [developer friendly].
 
 ### What’s the catch?
 
-[Document Promises] is [public domain], dependency free, and 195 bytes when minified and gzipped.
+[Document Promises] is [public domain], dependency free, and 252 bytes or less when minified and gzipped.
 
 ### Any known limitations?
 
diff --git a/document-promises.es6 b/document-promises.es6
new file mode 100644
index 0000000..41c76ae
--- /dev/null
+++ b/document-promises.es6
@@ -0,0 +1,19 @@
+let promisify = (type, readyState) => {
+	return new Promise((resolve) => {
+		let listener = () => {
+			if (readyState.test(document.readyState)) {
+				document.removeEventListener(type, listener);
+
+				resolve();
+			}
+		};
+
+		document.addEventListener(type, listener);
+
+		listener();
+	});
+};
+
+export let interactive = promisify('readystatechange', /^(?:interactive|complete)$/);
+export let contentLoaded = promisify('DOMContentLoaded', /^(?:interactive|complete)$/);
+export let loaded = promisify('readystatechange', /^complete$/);
diff --git a/document-promises.js b/document-promises.js
deleted file mode 100644
index f77c916..0000000
--- a/document-promises.js
+++ /dev/null
@@ -1,30 +0,0 @@
-if (!document.loaded) {
-	(function () {
-		function documentPromise(type, readyState) {
-			// promise an event has fired with a matching ready state
-			return new Promise(function (resolve) {
-				function listener() {
-					if (readyState.test(document.readyState)) {
-						document.removeEventListener(type, listener);
-
-						resolve();
-					}
-				}
-
-				document.addEventListener(type, listener);
-
-				listener();
-			});
-		}
-
-		// mdn ready states: loading, interactive, & complete
-		// https://developer.mozilla.org/en-US/docs/Web/API/Document/readyState
-		// msdn ready states: uninitialized, loading, loaded, interactive, & complete
-		// https://msdn.microsoft.com/en-us/library/ms534358(v=vs.85).aspx
-
-		// document promises
-		document.interactive = documentPromise('readystatechange', /r|m/);
-		document.contentLoaded = documentPromise('DOMContentLoaded', /r|m/);
-		document.loaded = documentPromise('readystatechange', /m/);
-	})();
-}
diff --git a/package.json b/package.json
index e370efd..d9c1719 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "document-promises",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "description": "Document loading states as Promises",
   "author": "Jonathan Neal <jonathantneal@hotmail.com> (http://jonathantneal.com)",
   "license": "CC0-1.0",
@@ -8,28 +8,43 @@
   "homepage": "https://github.com/jonathantneal/document-promises#readme",
   "bugs": "https://github.com/jonathantneal/document-promises/issues",
   "main": "document-promises.js",
+  "jsnext:main": "document-promises.es6",
   "files": [
+    "document-promises.es6",
     "document-promises.js",
     "LICENSE.md"
   ],
   "scripts": {
-    "test": "eslint document-promises.js && jscs document-promises.js"
+    "prepublish": "babel document-promises.es6 --out-file document-promises.js",
+    "test": "eslint document-promises.es6 && jscs document-promises.es6"
   },
   "engines": {
     "node": ">=4.0.0"
   },
   "devDependencies": {
+    "babel-cli": "^6.18.0",
+    "babel-preset-es2015": "^6.18.0",
     "eslint": "^3.8.1",
     "eslint-config-10up": "github:jonathantneal/eslint-config-10up",
-    "jscs": "^3.0.7"
+    "jscs": "^3.0.7",
+    "jscs-config-10up": "github:jonathantneal/jscs-config-10up"
+  },
+  "babel": {
+    "presets": [
+      [
+        "es2015", {
+          "loose": true,
+          "modules": "commonjs"
+        }
+      ]
+    ]
   },
   "eslintConfig": {
     "extends": "10up",
-    "rules": {
-      "consistent-this": [
-        2,
-        "document"
-      ]
+    "parserOptions": {
+      "ecmaVersion": 6,
+      "impliedStrict": true,
+      "sourceType": "module"
     }
   },
   "jscsConfig": {
@@ -44,8 +59,5 @@
     "interactive",
     "state",
     "promise"
-  ],
-  "dependencies": {
-    "jscs-config-10up": "github:jonathantneal/jscs-config-10up"
-  }
+  ]
 }