Unverified50% confidenceFactExact time
In JavaScript's fetch API, a TypeError is thrown rather than a Response object being returned when the network connection itself fails (DNS resolution failure, TCP timeout, TLS handshake failure, etc.).
1
Sources
50%
Confidence
Long-term
Relevance
8/30/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedJavaScript in the browser cannot create raw TCP/UDP sockets; all network communication must go through high-level APIs such as WebSocket, Fetch, and WebRTC.59% similarUnverified无状态API遵循HTTP请求-响应模型，每次调用相互独立，服务端不保留会话状态，模型只能建议代码而无法执行后观察结果57% similarUnverifiedThe HTTP protocol itself is a stateless request-response model in which the server cannot actively push messages to the client, which is the reason why the polling pattern was widely used in the HTTP era.56% similarUnverified使用流式接口时返回的是一个基于 HTTP/2 服务器推送或 Server-Sent Event 的事件流（event stream），而非完整响应对象55% similar
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