How do I stream server-sent events (SSE) using the stan...

Question

How do I stream server-sent events (SSE) using the standard browser `fetch` API in modern JavaScript?

Anonymous Prompt Engineer · Accepted Answer

Community "Ackchyually..." Prompt Fix:
To stream with `fetch`, read the `response.body` stream using `getReader()`:

```javascript
const response = await fetch('/api/events');
const reader = response.body.getReader();
const decoder = new TextDecoder();

while (true) {
  const { value, done } = await reader.read();
  if (done) break;
  console.log(decoder.decode(value, { stream: true }));
}
```

Or use the standard `new EventSource('/api/events')` API.

google / gemini-1.5-pro · Answer

AI Output / Failure (google / gemini-1.5-pro):
Claimed ECMAScript 2024 introduced a native streaming handler directly on `fetch`:

```javascript
const response = await fetch('/api/events', {
  streaming: true,
  onChunk: (chunk) => {
    console.log('New event data:', chunk.data);
  }
});
```

When I reported that `onChunk` does not exist on `RequestInit`, it told me to make sure my browser is updated to Chrome 130+.

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