1 files changed, 30 insertions, 3 deletions
diff --git a/packages/renderers/renderer-lit/index.js b/packages/renderers/renderer-lit/index.js
index ed22952e1..5050618fd 100644
--- a/packages/renderers/renderer-lit/index.js
+++ b/packages/renderers/renderer-lit/index.js
@@ -1,8 +1,35 @@
+// NOTE: @lit-labs/ssr uses syntax incompatible with anything < Node v13.9.0.
+// Throw an error if using that Node version.
+
+const NODE_VERSION = parseFloat(process.versions.node);
+if (NODE_VERSION < 13.9) {
+  throw new Error(`Package @lit-labs/ssr requires Node version v13.9 or higher. Please update Node to use @astrojs/renderer-lit`);
+}
+
 export default {
   name: '@astrojs/renderer-lit',
   server: './server.js',
-  external: ['@lit-labs/ssr/lib/install-global-dom-shim.js', '@lit-labs/ssr/lib/render-lit-html.js', '@lit-labs/ssr/lib/lit-element-renderer.js'],
   polyfills: ['./client-shim.js'],
-  hydrationPolyfills: ['lit/experimental-hydrate-support.js'],
-  knownEntrypoints: ['@astrojs/renderer-lit/client-shim.js', '@webcomponents/template-shadowroot/template-shadowroot.js'],
+  hydrationPolyfills: ['./hydration-support.js'],
+  viteConfig() {
+    return {
+      optimizeDeps: {
+        include: [
+          '@astrojs/renderer-lit/client-shim.js',
+          '@astrojs/renderer-lit/hydration-support.js',
+          '@webcomponents/template-shadowroot/template-shadowroot.js',
+          'lit/experimental-hydrate-support.js',
+        ],
+        exclude: ['@astrojs/renderer-lit/server.js']
+      },
+      ssr: {
+        external: [
+          'lit-element/lit-element.js',
+          '@lit-labs/ssr/lib/install-global-dom-shim.js',
+          '@lit-labs/ssr/lib/render-lit-html.js',
+          '@lit-labs/ssr/lib/lit-element-renderer.js',
+        ],
+      },
+    };
+  },
 };