Reddit Clone Series Ep 18 – Cropped Image with Canvas & React Image Crop Utils

In this episode of our Reddit Clone series, we extend the image cropping functionality using HTML canvas. We implement logic to extract the cropped portion of an image, convert it to a Blob and File, and update both the form data and the preview card. This ensures users can upload properly cropped banner and avatar images without losing quality.

Resources:
Buy me a coffee: buymeacoffee.com/bartingyo
Code Repository: https://github.com/bartingyo/reddit-clone/commit/0f40aa0480fbd837cde30062f7500eb51b3c3f8d
React Image Crop: https://www.npmjs.com/package/react-image-crop
Canvas DrawImage: https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/drawImage

Timeline:
00:00 – Intro & Save button plan
01:05 – Pseudo-code for canvas cropping workflow
03:40 – Convert percent crop → pixel crop with utility
09:30 – Render cropped image on canvas element
20:00 – Preserve resolution & prevent blurry output
25:16 – Convert canvas → Blob/File
31:30 – Update form fields & preview state
36:20 – Reset cropping & final Stage Two test
39:18 – Commit & wrap-up
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Видео Reddit Clone Series Ep 18 – Cropped Image with Canvas & React Image Crop Utils канала Bartingyo