Cheat Sheet 💩

How it works?

let scanner = new ZXingScannerComponent();

scanner.hasPermission check

scanner.hasDevices over check

State meanings

Below we have something I call qubool (quantum booleans), because they're booleans with multiple values, more than 0 and 1, like a qubit.

scanner.hasPermission

State	😎	Description
true	✔	Permission Granted.
false	❌	Permission Denied.
undefined	❔	Not checked yet.
null	⭕	Check has failed and the state couldn't be updated.

scanner.hasDevices

State	😎	Description
true	✔	Usable devices found.
false	❌	No available devices.
undefined	❔	Not checked yet.
null	⭕	Check has failed and the state couldn't be updated.