Tweet
Hey everyone,
I recently finished a small HTML5 browser game project and learned a lot the hard way — mostly about security and performance. Thought I’d share in case it helps someone else avoid the same mistakes.
Security pitfalls:
At first, I trusted everything the client sent — big mistake. Players could easily fake scores and resubmit the same payloads. I had to add server-side validation, tokens for each session, and rate limiting on API calls. I also realized how easy it is to overlook input sanitization; even usernames in a leaderboard can become XSS vectors if you’re careless.
Performance pitfalls:
I underestimated how heavy a few images and animations can be. Initially, I loaded all assets at startup and redrew the entire canvas every frame, which tanked performance. Now I lazy-load images, reuse objects instead of constantly creating new ones, and only update parts of the screen that change. Reducing alpha blending and unnecessary shadows also made a big difference.
Overall, it was a great learning experience — fun, frustrating, and humbling. If anyone else here has built browser games, I’d love to hear your performance or security horror stories.
I recently finished a small HTML5 browser game project and learned a lot the hard way — mostly about security and performance. Thought I’d share in case it helps someone else avoid the same mistakes.
Security pitfalls:
At first, I trusted everything the client sent — big mistake. Players could easily fake scores and resubmit the same payloads. I had to add server-side validation, tokens for each session, and rate limiting on API calls. I also realized how easy it is to overlook input sanitization; even usernames in a leaderboard can become XSS vectors if you’re careless.
Performance pitfalls:
I underestimated how heavy a few images and animations can be. Initially, I loaded all assets at startup and redrew the entire canvas every frame, which tanked performance. Now I lazy-load images, reuse objects instead of constantly creating new ones, and only update parts of the screen that change. Reducing alpha blending and unnecessary shadows also made a big difference.
Overall, it was a great learning experience — fun, frustrating, and humbling. If anyone else here has built browser games, I’d love to hear your performance or security horror stories.