Working browsers

[unixfox]

Hello,

Very nice idea on the lazy load verification.

I did some testing using https://www.browserstack.com (you can do too, it's free).

Here is a table of browsers where your project works and after how many tries.

Browser	Works	Works after X retry
iOS Safari 18.3	Yes	1
Windows Chrome 134	Yes	0/direct
Android Chrome 128	Yes	0/direct
Android Firefox 133	Yes	0/direct
MacOS Safari 18.3	Yes	random 2 or 3
Windows Firefox 136	Yes	0/direct

[yzqzss]

Nice test!

The demo server backend is in Finland, and the connection to cloudflare is kinda unstable. In most places on the earth, HTTP RTT should be around 200~600ms.
The current hard-coded cssAnimationTS requires the browser to request 6 images in sequence within 3.5s. Considering the latency and jitter, there is a high possibility that the packets will arrive at the server out of order.

Gradually increasing the cssAnimationTS when retrying should improve the UX.

[unixfox]

The current hard-coded cssAnimationTS requires the browser to request 6 images in sequence within 3.5s. Considering the latency and jitter, there is a high possibility that the packets will arrive at the server out of order.

To be fair that worked great even in "emulated" 3G mode, something that you can test yourself using the devtools.