Playground: autofold for Markdown and other languages (#8331)

website/playground/util.js

@@ -56,6 +56,9 @@ const astAutoFold = {
   estree: /^\s*"(loc|start|end)":/,
   postcss: /^\s*"(source|input|raws|file)":/,
   html: /^\s*"(sourceSpan|valueSpan|nameSpan|startSourceSpan|endSourceSpan|tagDefinition)":/,
+  mdast: /^\s*"position":/,
+  yaml: /^\s*"position":/,
+  glimmer: /^\s*"loc":/,
 };
 
 export function getAstAutoFold(parser) {
@@ -76,7 +79,14 @@ export function getAstAutoFold(parser) {
     case "html":
     case "angular":
     case "vue":
-    case "lws":
+    case "lwc":
       return astAutoFold.html;
+    case "markdown":
+    case "mdx":
+      return astAutoFold.mdast;
+    case "yaml":
+      return astAutoFold.yaml;
+    case "glimmer":
+      return astAutoFold.glimmer;
   }
 }