Puppeteer: Cannot cancel DeviceRequestPrompt which is already handled!

The device prompt has already been handled before cancel.

Error message

Cannot cancel DeviceRequestPrompt which is already handled!

How this error happens

A device request prompt can be selected or cancelled only once. Reusing a completed prompt repeats its resolution.

The failing snippet assumes prompt is a live DeviceRequestPrompt from your application’s device chooser. Replace “Test device” with the device you intend to use.

const device = await prompt.waitForDevice(
    (device) => device.name.includes("Test device")
);

await prompt.select(
    device
);

await prompt.cancel();

How to fix

Handle a fresh prompt once. Get a device object from that exact prompt rather than reusing one from an earlier prompt.

const [prompt] = await Promise.all([
    page.waitForDevicePrompt(),
    page.click("#connect-device"),
]);

const device = await prompt.waitForDevice(
    (device) => device.name.includes("Test device")
);

await prompt.select(
    device
);

Things to keep in mind

The application must request a supported device prompt in response to the click, and a matching device must be available. For cancellation, call prompt.cancel once instead of selecting a device.

All Puppeteer errors