V2.3.3 fix error in Firefox

changelog.md

@@ -1,3 +1,6 @@
+### Version 2.3.3
+Quick fix for - [issue#621](https://github.com/mebjas/html5-qrcode/issues/621). With this zoom & torch is not supported in firefox for now.
+
 ### Version 2.3.2
 
 #### Features or bug fixes.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "html5-qrcode",
-  "version": "2.3.2",
+  "version": "2.3.3",
   "description": "A cross platform HTML5 QR Code & bar code scanner",
   "main": "./cjs/index.js",
   "module": "./esm/index.js",

src/camera/core-impl.ts

@@ -34,6 +34,12 @@ abstract class AbstractCameraCapability<T> implements CameraCapability<T> {
     }
 
     public isSupported(): boolean {
+        // TODO(minhazav): Figure out fallback for getCapabilities()
+        // in firefox.
+        // https://developer.mozilla.org/en-US/docs/Web/API/Media_Capture_and_Streams_API/Constraints
+        if (!this.track.getCapabilities) {
+            return false;
+        }
         return this.name in this.track.getCapabilities();
     }