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Created May 28, 2026 08:32
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safari-abortcontroller.md

Ran into some weird behavior with AbortController in Safari 17.

Pretty basic fetch with a timeout:

const controller = new AbortController();

setTimeout(() => controller.abort(), 3000);

try {
  const res = await fetch(url, {
    signal: controller.signal
  });
} catch (e) {
  console.log(e.name);
}

In Chrome and Firefox I consistently get AbortError, but in Safari the request sometimes just keeps hanging, especially when the server keeps the connection alive for a while.

Anyone else seen this?

Is this a Safari bug or am I missing something with signals/cleanup?

Mainly interested in behavior on macOS Sonoma + Safari 17.x.
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