Posts

• Automated Testing of Barcode Scanning Apps with Playwright Mar 28, 2025

  playwright testing

  A tutorial on how to leverage Playwright and Chromium's WebRTC faking capabilities to write automated end-to-end tests for barcode scanning web apps.

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• Embedding WebAssembly in QR Codes Feb 5, 2025

  qrcode webassembly

  QR Codes typically contain URLs, but they can also contain... other things.

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• Creating an Overlay with a Transparent Cutout Dec 17, 2024

  canvas

  A short tutorial on how to create an overlay with a transparent rounded rectangle cutout using the 2D Canvas API, namely the fillRect(), clearRect() and clip() operations.