Ensure canvas style is set.

Author: dlongley

lib/barcodes.js

@@ -39,6 +39,7 @@ async function _detectWithHspLuminance({barcodeDetector, video}) {
   const height = video.videoHeight;
   canvas.width = width;
   canvas.height = height;
+  canvas.style = `width: ${width}px; height: ${height}px`;
   const ctx = canvas.getContext('2d');
   ctx.drawImage(video, 0, 0);
   const imageData = ctx.getImageData(0, 0, width, height);