Product page: Changing quantity or size reloads product image about classic-rocket

[prestarocket]

it is not handled by the theme but by ProductController and core.js: https://github.com/PrestaShop/PrestaShop/blob/1.7.4.x/controllers/front/ProductController.php#L398

[mortenhartvig]

Blinking images on a white background is bad for everything, including - and not limited to - epilepsy:)

It's not a bug/feature in "native", because it becomes a bug/feature when you add lazy-loading the way this theme does. I currently use lazy-loading with mod_pagespeed for a "prestashop_classic" fork, and even though it behaves worse, it dosn't flickr the images, as it checks if the file is the same before changing:)

Instead of replacing existing (loaded) images with the loading-spinner. Just append the spinner on top of the existing (loaded) image with a higher z-index or similar solution, where you don't replace an image with a blank background.

Please, for the sake of epilepsy, and UX in general. :)

I may add it at some point and do a pull-request/fork, when i update my production shop to 1.7.4.x, but that may take months due to no time.

[prestarocket]

i'm not sure to understand your point but i can remove lazyloading only for the first product img (it s always in the viewport) in order to remove this blinking effect; what do you think about it ?