How to check the camera permissions programmatically in Dynamsoft Barcode Reader JavaScript SDK?

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version 10 or recent

In version 10, use the dynamsoft camera enhancer to utilize the testCameraAccess method to check the camera status programmatically.

version 9.6.10 till version 10

you can utilize the testCameraAccess method to check the camera status programmatically.

version older than 9.6.10

you can check the status using a try-catch block as shown below:

try {
  await scanner.open(); // or 'await scanner.show()'
} catch(e) {
  if(e.name === "NotAllowedError") {
    // it means the user denied permission  
    // add your code here to guide users to grant permission
  }
}

In case permission is denied, you can prompt the user (using an alert or something similar) to manually grant permission for your website to access the camera via the site settings.