brother-ql / web/src / requestPrinters

Function: requestPrinters()

requestPrinters(opts): Promise<Readonly<Record<string, PrinterAdapter>>>

Unified browser-picker factory for the brother-ql driver family.

Dispatches on opts.transport:

'usb' — opens navigator.usb picker. Auto-identifies via usbDevice.vendorId/productId against the registry. Throws DeviceIdentificationRequiredError only if the picked device's VID/PID is not in the brother-ql registry.
'bluetooth-spp' — always-ask (Web Serial has no BT name surface). opts.deviceKey required; if omitted, throws DeviceIdentificationRequiredError with the BT-SPP-capable subset of DEVICES (e.g. QL_820NWBc, PT_P910BT). continueWith(deviceKey) opens the Web Serial picker for the chosen device.
'serial' — not declared in the brother-ql registry today; throws unconditionally.
'bluetooth-gatt' — not declared in the brother-ql registry today; throws unconditionally.

Returns a 1-key PrinterAdapterMap keyed by the device's primary engine role.

Parameters

Promise<Readonly<Record<string, PrinterAdapter>>>