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Dynamsoft Barcode Reader SDK - JavaScript BarcodeScanner Class

The BarcodeScanner class is used for video decoding.

`BarcodeScanner` Class Methods

The following methods are related to the initialization of BarcodeScanner instances.

Method	Description
`createInstance`	Create a `BarcodeScanner` instance.
`detectEnvironment`	Detect the current environment. Inherited from the `BarcodeReader` class.
`isLoaded`	Check if the decoding module is loaded. Inherited from the `BarcodeReader` class.
`loadWasm`	Manually load and compile the decoding WASM module. Inherited from the `BarcodeReader` class.

Method	Description
`destroy`	Destroy the `BarcodeScanner` instance.

Method	Description
`getUIElement`	Get HTML element containing the `BarcodeScanner` instance.
`setUIElement`	Set html element containing the `BarcodeScanner` instance.

The following methods are related to controlling the camera and its settings.

Method	Description
`getAllCameras`	Get information of all available cameras on the device.
`getCurrentCamera`	Get information about the currently used camera.
`setCurrentCamera`	Set camera by its information or device ID.
`show`	Show the camera UI element, open the camera, and start decoding.
`hide`	Stop the camera and hide the camera UI element.
`open`	Open the camera.
`close`	Close and release the camera.
`isOpen`	Check if the camera is open.
`play`	Continue the video stream.
`pause`	Pause the video stream.
`stop`	Stop the video and release the camera.
`pauseScan`	Pause the video decoding process.
`resumeScan`	Resume the video decoding process.

The following methods are related to the camera’s capture settings.

Method	Description
`getCapabilities`	Get the camera capabilities.
`getResolution`	Get current video resolution.
`setResolution`	Set current video resolution.
`getScanSettings`	Get current scan settings.
`updateScanSettings`	Modify and update scan settings.
`getVideoSettings`	Get current video settings.
`updateVideoSettings`	Modify and update video settings.
`setColorTemperature`	Adjust the video colour temperature.
`setExposureCompensation`	Adjust the video exposure level.
`setFrameRate`	Adjust the video frame rate.
`setZoom`	Adjust the video zoom ratio.
`turnOnTorch`	Turn on the torch/flashlight.
`turnOffTorch`	Turn off the torch/flashlight.

The following methods are related to customizing runtime settings.

Method	Description
`getRuntimeSettings`	Get current runtime settings. Inherited from the `BarcodeReader` class.
`resetRuntimeSettings`	Reset runtime settings to default.Inherited from the `BarcodeReader` class.
`updateRuntimeSettings`	Modify and update the current runtime settings.
`getModeArgument`	Get argument value for the specified mode parameter. Inherited from the `BarcodeReader` class.
`setModeArgument`	Set argument value for the specified mode parameter. Inherited from the `BarcodeReader` class.

Property	Description
`defaultUIElementURL`	Get or set the default scanner UI.
`_bUseFullFeature`	If set to `true`, use the full-featured WASM module. Inherited from the `BarcodeReader` class.
`engineResourcePath`	Get or set the engine (WASM) location. Inherited from the `BarcodeReader` class.
`productKeys`	Get or set the Dynamsoft Barcode Reader SDK product keys. Inherited from the `BarcodeReader` class.
`version`	Get the current version. Inherited from the `BarcodeReader` class.
`licenseServer`	Specify by URL the license server from where authorization is acquired at runtime. Inherited from the `BarcodeReader` class.
`handshakeCode`	Specify the Handshake Code which determines what authorization is acquired. Inherited from the `BarcodeReader` class.
`sessionPassword`	Specify a password which protects the Handshake Code from abuse. Inherited from the `BarcodeReader` class.

Property	Description
`bDestroyed`	Indicates whether a `BarcodeScanner` instance has been destroyed. Inherited from the `BarcodeReader` class.
`bSaveOriCanvas`	If set to `true`, save the original image in `oriCanvas`. Inherited from the `BarcodeReader` class.
`oriCanvas`	An OffscreenCanvas object that holds the original image. Inherited from the `BarcodeReader` class.
`_bUseWebgl`	Whether to enable image preprocessing with WebGL APIs, this API may change in the future. Inherited from the `BarcodeReader` class.
`bPlaySoundOnSuccessfulRead`	If set to `true`, a sound will be played when a barcode is read successfully. You can change the sound using `soundOnSuccessfulRead`
`barcodeFillStyle`	Set the style used when filling in located barcode.
`barcodeLineWidth`	Set the width of the located barcode border.
`barcodeStrokeStyle`	Set the style of the located barcode border.
`regionMaskFillStyle`	Set the style used when filling the mask beyond the region.
`regionMaskLineWidth`	Set the width of the region border.
`regionMaskStrokeStyle`	Set the style of the region border.
`onFrameRead`	Triggered a frame has been scanned.
`onPlayed`	Triggered when the camera video stream is played.
`onUnduplicatedRead`	Triggered when a new, unduplicated barcode is found.
`singleFrameMode`	If set to `true`, single video frames will be used instead of a continuous video stream.
`soundOnSuccessfulRead`	Get or set the sound to play when a barcode is read successfully.

Interface	Description
`FrameFilter`	Filter and discard video frames while focusing.
`ScanSettings`	Configures the video stream settings.
`ScannerPlayCallbackInfo`	Stores the height and width constraints of the video stream.
`VideoDeviceInfo`	Stores the video device information.