use preset-env instead of preset-es2015

Author: Andrew Schmadel

.babelrc

@@ -1,3 +1,12 @@
 {
-  "presets": ["es2015"]
+  "presets": [
+    [
+      "env",
+      {
+        "targets": {
+          "browsers": ["last 2 versions"]
+        }
+      }
+    ]
+  ]
 }

docs/index.html

@@ -87,7 +87,9 @@ <h3>Warnings</h3>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.17.0/codemirror.js"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.17.0/mode/javascript/javascript.js"></script>
 
-<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.10.3/babel.js"></script>
+<script src='https://unpkg.com/babel-standalone@6/babel.js' defer></script>
+<script src='https://unpkg.com/babel-polyfill@6/dist/polyfill.min.js' defer></script>
+<script src='https://unpkg.com/babel-preset-env-standalone@0.0.6/babel-preset-env.js' defer></script>
 <script src="repl-browser.js"></script>
 
 <script>
@@ -105,7 +107,7 @@ <h3>Warnings</h3>
         continueComments: "Enter",
         readOnly: true
 	};
-	
+
 	var input = CodeMirror(document.getElementById('input'), inputOpts);
 	var output = CodeMirror(document.getElementById('output'), outputOpts);
 
@@ -141,4 +143,4 @@ <h3>Warnings</h3>
 	document.getElementById('es5').onchange = function(){ change(input) }
 </script>
 </body>
-</html>
+</html>

docs/repl-browser.js

@@ -157,15 +157,16 @@ module.exports = function () {
 
 // super-simple in-browser REPL for testing this thing
 // to build:
-// 
+//
 // npm install -g browserify
 // browserify repl.js -o repl-browser.js
 
 var plugin = require('../babel-ng-annotate');
 
 window.transform = function (code, es2015) {
+
 	return Babel.transform(code, {
-		presets: es2015 ? ['es2015'] : [],
+		presets: es2015 ? [window.babelPresetEnv.default] : [],
 		plugins: [plugin]
 	});
 };

docs/repl.js

@@ -1,14 +1,15 @@
 // super-simple in-browser REPL for testing this thing
 // to build:
-// 
+//
 // npm install -g browserify
 // browserify repl.js -o repl-browser.js
 
 var plugin = require('../babel-ng-annotate');
 
 window.transform = function(code, es2015){
+
 	return Babel.transform(code, {
-		presets: es2015 ? ['es2015'] : [],
+		presets: es2015 ? [window.babelPresetEnv.default] : [],
 		plugins: [plugin]
 	});
-}
+}