`hasPermission` and `hasDevices` cheat sheet

Cheat Sheet 💩

let scanner = new ZXingScannerComponent();

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

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

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.

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