diff --git a/apps/docs/components/MarkdownDoc.tsx b/apps/docs/components/MarkdownDoc.tsx
index 012b638..31ebe8a 100644
--- a/apps/docs/components/MarkdownDoc.tsx
+++ b/apps/docs/components/MarkdownDoc.tsx
@@ -10,6 +10,7 @@ import {
 } from "@decadez/web-dev-ui/mdx";
 import { MdxComponentGallery } from "./MdxComponentGallery";
 import { getHeadingId } from "@/utils/headings";
+import { getSandboxAppFile } from "@/utils/sandbox";
 
 type Token =
   | { type: "heading"; depth: 2 | 3; text: string }
@@ -75,12 +76,13 @@ function renderToken(token: Token, index: number) {
       return null;
     case "code":
       if (token.meta.includes("sandbox")) {
+        const appFile = getSandboxAppFile(token.language);
         return (
           <MDXSandbox
             key={index}
-            activeFile="/src/App.js"
+            activeFile={appFile}
             files={{
-              "/src/App.js": token.code,
+              [appFile]: token.code,
               "/src/styles.css": sandboxStyles,
             }}
           />
diff --git a/apps/docs/next-env.d.ts b/apps/docs/next-env.d.ts
index 1970904..7996d35 100644
--- a/apps/docs/next-env.d.ts
+++ b/apps/docs/next-env.d.ts
@@ -1,6 +1,6 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
-import "./.next/types/routes.d.ts";
+import "./.next/dev/types/routes.d.ts";
 
 // NOTE: This file should not be edited
 // see https://nextjs.org/docs/pages/api-reference/config/typescript for more information.
diff --git a/apps/docs/utils/sandbox.ts b/apps/docs/utils/sandbox.ts
new file mode 100644
index 0000000..08d1dd9
--- /dev/null
+++ b/apps/docs/utils/sandbox.ts
@@ -0,0 +1,11 @@
+const sandboxLanguageExtensions: Record<string, string> = {
+  js: "js",
+  jsx: "jsx",
+  ts: "ts",
+  tsx: "tsx",
+};
+
+export function getSandboxAppFile(language: string) {
+  const extension = sandboxLanguageExtensions[language.toLowerCase()] ?? "js";
+  return `/src/App.${extension}`;
+}
diff --git a/packages/web-dev-ui/package.json b/packages/web-dev-ui/package.json
index 71d6905..be145ea 100644
--- a/packages/web-dev-ui/package.json
+++ b/packages/web-dev-ui/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@decadez/web-dev-ui",
-  "version": "0.3.1",
+  "version": "0.3.2",
   "type": "module",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
diff --git a/packages/web-dev-ui/src/mdx/sandpack/Preview.tsx b/packages/web-dev-ui/src/mdx/sandpack/Preview.tsx
index 2976f2f..0dfec23 100644
--- a/packages/web-dev-ui/src/mdx/sandpack/Preview.tsx
+++ b/packages/web-dev-ui/src/mdx/sandpack/Preview.tsx
@@ -24,6 +24,37 @@ type CustomPreviewProps = {
   preview?: ReactNode;
 };
 
+type SandpackPreviewError = {
+  title?: string;
+  message: string;
+} | null;
+
+export function shouldShowSandpackConsole(_error: SandpackPreviewError) {
+  return true;
+}
+
+export function shouldHideSandpackPreview({
+  bundlerIsReady,
+  currentError,
+  displayedError,
+  iframeComputedHeight,
+  previewIsSettled,
+}: {
+  bundlerIsReady: boolean;
+  currentError: SandpackPreviewError;
+  displayedError: SandpackPreviewError;
+  iframeComputedHeight: number | null;
+  previewIsSettled: boolean;
+}) {
+  return (
+    currentError !== null ||
+    displayedError !== null ||
+    iframeComputedHeight === null ||
+    !bundlerIsReady ||
+    !previewIsSettled
+  );
+}
+
 function useDebounced<T>(value: T): T {
   const ref = useRef<ReturnType<typeof setTimeout> | null>(null);
   const [saved, setSaved] = useState(value);
@@ -123,6 +154,12 @@ function LivePreview({
   }
 
   const error = useDebounced(rawError);
+  const previewCanBeShown =
+    rawError === null &&
+    error === null &&
+    iframeComputedHeight !== null &&
+    bundlerIsReady;
+  const previewIsSettled = useDebounced(previewCanBeShown);
   const clientId = useId();
   const iframeRef = useRef<HTMLIFrameElement | null>(null);
   const sandpackIdle = sandpack.status === "idle";
@@ -173,7 +210,13 @@ function LivePreview({
     [listen, clientId, sandpackIdle]
   );
 
-  const hideContent = error || !iframeComputedHeight || !bundlerIsReady;
+  const hideContent = shouldHideSandpackPreview({
+    bundlerIsReady,
+    currentError: rawError,
+    displayedError: error,
+    iframeComputedHeight,
+    previewIsSettled,
+  });
 
   const iframeWrapperPosition = (): CSSProperties => {
     if (hideContent) {
@@ -234,7 +277,7 @@ function LivePreview({
           />
         </div>
       </SandpackStack>
-      <SandpackConsole visible={!error} />
+      <SandpackConsole visible={shouldShowSandpackConsole(error)} />
     </>
   );
 }
diff --git a/packages/web-dev-ui/src/mdx/sandpack/template.ts b/packages/web-dev-ui/src/mdx/sandpack/template.ts
index 250be8c..da59426 100644
--- a/packages/web-dev-ui/src/mdx/sandpack/template.ts
+++ b/packages/web-dev-ui/src/mdx/sandpack/template.ts
@@ -29,9 +29,12 @@ root.render(
         },
         dependencies: {
           "@decadez/web-dev-ui": "latest",
+          "@types/react": "^19.2.17",
+          "@types/react-dom": "^19.2.3",
           react: "^19.2.7",
           "react-dom": "^19.2.7",
           "react-scripts": "^5.0.0",
+          typescript: "^4.9.5",
         },
       },
       null,