OptionalengineEngine configuration
OptionalfeedbackFeedback configuration
OptionalframeFrame source configuration
OptionallocatorLocator configuration
OptionalmodeMode: can be 'immediate' (default) for always-on scanning, and 'touch', to only scan when a touch occurs.
OptionaloverlayOverlay configuration
CSS Selector or reference to the HTML element that will host the visible elements of the BarcodeReader.
BarcodeReader configuration object.