Response Body

Definition

The data payload sent back from the server to the client after processing an HTTP request.

Explain Like I'm New

You asked the server a question. The Response Body is the server's answer. It could be an HTML webpage, a JPEG image, or a JSON object containing database records.

Real World Example

When a frontend app fetches `/api/weather`, the Response Body contains the actual JSON string: `{"temp": 72, "status": "Sunny"}`. The frontend parses it and puts '72' on the screen.

Common Use Cases

•Delivering requested data
•Providing error details

Interactive Example

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Interview Questions

basic

What JavaScript method is used on the frontend `fetch` API to extract a JSON Response Body from the network response?

intermediate

Does a `204 No Content` response code include a Response Body?

Flash Cards

Question

Which method?

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Answer

`.json()` (e.g., `const data = await response.json();`).

Question

204 have a body?

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Answer

No! By definition, a 204 response must not have a body. If you try to call `.json()` on a 204 response on the frontend, your JavaScript will crash.