Identify if webcam is allowed by user or not about ngx-webcam

[basst314]

Hi @peddikishore,

sorry it took a while to get back to you.

Unfortunately there's currently no 'flag' that you could just query to get this info, but if you add the webcam-component to your page and webcam initialization was not successful (i.e. due to blocked access), then an error will be emitted through the initError EventEmitter of the component.

Capture that error object and check for an error message like 'Permission denied'.
Example object: { "message": "Permission denied" ... }

The demo page will show these messages when they occur, so best try for yourself - visit the page and block webcam access.

Hope that helps.

I will still try to find out more whether checking for blocked access is possible through the browser API.

[basst314]

Hi @peddikishore,

I found a better way to check for blocked camera access:

When the camera was blocked, the webcam component publishes a WebcamInitError through the initError EventEmitter. While checking for the message is probably not a good practice (message might change), according to Mozilla Docs, the name attribute of the wrapped MediaStreamError has the value NotAllowedError in case webcam access was blocked / not allowed by the user:

If the user denies permission, or matching media is not available, then the promise is rejected with NotAllowedError or NotFoundError respectively.

I verified this with some example code like this:

  <webcam (initError)="handleInitError($event)"></webcam>

---

  public handleInitError(error: WebcamInitError): void {
    if (error.mediaStreamError && error.mediaStreamError.name === "NotAllowedError") {
      console.warn("Camera access was not allowed by user!");
    }
  }

I also updated the readme file with this information.

Hope this is helpful!

Cheers!