以下为ChatGPT自动生成的解答，正确与否请自行判断。 也许你也可以从大家的发帖中找到想要的答案！
BFE.devAI解答 - 前端面试问题
169. What is the response body of HTTP status code 304?
The HTTP status code 304 is a Not Modified status code which indicates that the requested resource has not been modified since the last time the client (such as a web browser) requested it. Therefore, the response body of this status code is empty. Instead of sending the resource again, the server will send a small response header that tells the client to use its cached copy of the resource.