Resource Base
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Javascript API Reference - BarcodeScanner Camera Control Methods
| 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. |
hide |
Stop the camera and hide the camera UI element. |
show |
Show the camera UI element, open the camera, and start decoding. |
close |
Close and release the camera. |
isOpen |
Check if the camera is open. |
open |
Open the camera. |
pause |
Pause the video stream. |
play |
Continue the video stream. |
stop |
Stop the video and release the camera. |
pauseScan |
Pause the video decoding process. |
resumeScan |
Resume the video decoding process. |
getAllCameras
Get information of all available cameras on the device.
getAllCameras() returns Promise
Return Value
Promise<VideoDeviceInfo[]>
Sample
let cameras = await scanner.getAllCameras();
if(cameras.length){
await scanner.setCurrentCamera(cameras[0]);
}
getCurrentCamera
Get information about the currently used camera.
getCurrentCamera() returns Promise
Return Value
Promise<VideoDeviceInfo[] | null>
setCurrentCamera
Set camera by its information or device ID.
setCurrentCamera(cameraInfoOrDeviceId) returns Promise
Parameters
cameraInfoOrDeviceId any
Return Value
Promise<ScannerPlayCallbackInfo>
Sample
Read barcodes from live camera
hide
Stop decoding, close and release the camera, unbind from UI, and set the UI element with display:none;
hide() returns void
Return Value
void
Sample
Read barcodes from live camera
show
Bind UI, open the camera, remove the UIElement display style if the original style is display:none;, and start decoding.
show() returns Promise
Return Value
Promise<ScannerPlayCallbackInfo>
Sample
Read barcodes from live camera
close
Stop decoding, close and release the camera, and unbind from UI.
close() returns void
Return Value
void
Sample
Read barcodes from live camera
isOpen
Check if the scanner is open.
isOpen() returns Boolean
Return Value
Boolean
Sample
Read barcodes from live camera
open
Bind UI, open the camera, and start decoding.
open() returns Promise
Return Value
Promise<ScannerPlayCallbackInfo>
Sample
Read barcodes from live camera
pause
Pause the video stream but will not release the camera.
pause() returns void
Return Value
void
Sample
Read barcodes from live camera
play
Continue the video stream.
play(deviceId, width, height) returns Promise
Parameters
deviceIdstringwidthnumberheightnumber
Return Value
Promise<ScannerPlayCallbackInfo>
Sample
Read barcodes from live camera
stop
Stop the video, and release the camera.
stop() returns void
Return Value
void
Sample
Read barcodes from live camera
pauseScan
Pause the video decoding process.
pauseScan() returns void
Return Value
void
Sample
Read barcodes from live camera
resumeScan
Resume the video decoding process.
resumeScan() returns void
Return Value
void
Yes
No