Include babel for codesandbox

examples/templates/example.html

@@ -144,7 +144,7 @@
     <style>
       .map {
         width: 100%;
-        height:400px;
+        height: 400px;
       }
 {{#if css.source}}{{ indent css.source spaces=6 }}{{/if}}    </style>
   </head>

examples/webpack/example-builder.js

@@ -346,6 +346,7 @@ export default class ExampleBuilder {
         dependencies: getDependencies(jsSources, pkg),
         devDependencies: {
           vite: '^3.0.3',
+          '@babel/core': 'latest',
         },
         scripts: {
           start: 'vite',