docs: add example notebook for the JS SDK

components-mdx/get-started-js-sdk.mdx

@@ -0,0 +1,28 @@
+```ts filename="server.ts"
+import { Langfuse } from "langfuse";
+
+const langfuse = new Langfuse();
+
+const trace = langfuse.trace({
+  name: "my-AI-application-endpoint",
+});
+
+// Example generation creation
+const generation = trace.generation({
+  name: "chat-completion",
+  model: "gpt-3.5-turbo",
+  modelParameters: {
+    temperature: 0.9,
+    maxTokens: 2000,
+  },
+  input: messages,
+});
+
+// Application code
+const chatCompletion = await llm.respond(prompt);
+
+// End generation - sets endTime
+generation.end({
+  output: chatCompletion,
+});
+```

cookbook/_routes.json

@@ -154,5 +154,9 @@
   {
     "notebook": "example_query_data_via_sdk.ipynb",
     "docsPath": null
+  },
+  {
+    "notebook": "js_langfuse_sdk.ipynb",
+    "docsPath": "docs/sdk/typescript/example-notebook"
   }
 ]