docs(v6): update JavaScript example for refresher

Author: soundproofboot

static/usage/v6/refresher/advanced/index.md

@@ -1,6 +1,7 @@
 import Playground from '@site/src/components/global/Playground';
 
-import javascript from './javascript.md';
+import javascript_index_html from './javascript/index_html.md';
+import javascript_index_ts from './javascript/index_ts.md';
 
 import react_main_tsx from './react/main_tsx.md';
 import react_main_css from './react/main_css.md';
@@ -14,7 +15,12 @@ import angular_example_component_css from './angular/example_component_css.md';
 <Playground
   version="6"
   code={{
-    javascript,
+    javascript: {
+      files: {
+        'index.html': javascript_index_html,
+        'index.ts': javascript_index_ts,
+      },
+    },
     react: {
       files: {
         'src/main.tsx': react_main_tsx,

static/usage/v6/refresher/advanced/javascript.md renamed to static/usage/v6/refresher/advanced/javascript/index_html.md

@@ -0,0 +1,29 @@
+```ts
+import { defineCustomElements } from '@ionic/core/loader';
+
+import { addIcons } from 'ionicons';
+import { ellipse } from 'ionicons/icons';
+
+/* Core CSS required for Ionic components to work properly */
+import '@ionic/core/css/core.css';
+
+/* Basic CSS for apps built with Ionic */
+import '@ionic/core/css/normalize.css';
+import '@ionic/core/css/structure.css';
+import '@ionic/core/css/typography.css';
+
+/* Optional CSS utils that can be commented out */
+import '@ionic/core/css/padding.css';
+import '@ionic/core/css/float-elements.css';
+import '@ionic/core/css/text-alignment.css';
+import '@ionic/core/css/text-transformation.css';
+import '@ionic/core/css/flex-utils.css';
+import '@ionic/core/css/display.css';
+
+/* Theme variables */
+import './theme/variables.css';
+
+addIcons({ ellipse });
+
+defineCustomElements();
+```