Puppeteer: Unknown error code:

request.abort receives an error code absent from the supported mapping.

Error message

Unknown error code:

How this error happens

request.abort accepts Puppeteer’s abort reasons, not a numeric HTTP status or an arbitrary browser error label.

The snippets use an open Chrome/CDP page named page.

await page.setRequestInterception(
    true
);

const waiting = page.waitForRequest(
    () => true
);

const navigation = page.goto(
    "https://example.com/"
);

navigation.catch(() => { });

const request = await waiting;

await request.abort(
    "404"
);

How to fix

Use a supported abort reason such as failed. If you want an HTTP 404 response rather than a network failure, use respond.

await request.respond({
    status: 404,
    contentType: "text/plain",
    body: "Not found",
});

await navigation;

Things to keep in mind

The correction continues from the paused request above. An HTTP error response and an aborted network request have different semantics.

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