Lazy load

Yes there is an option for this in the gallery code.

preload – https://photoswipe.com/documentation/options.html

It’s not built into the plugin so you would have to do this manually sorry.

Do you have any experience with that build in lazyLoad (preload) option?
I’ve tried to add that option to your JavaScript code, but can’t see any difference.

If I look at the network tab of Chromes Dev Tools the same amount of image requests are made. Do I have to do anything additional or how can I check for that lazyLoad?

I assume that lazyLoad only lazy loads the big images not the thumbnails.

Edit:
Ok I’ve checked and _preloadImage function is called. I also see a little loading icon if I open an gallery image and swipe to the next one. But how does this improve my performance if the big images are still requested on initial page load?

These would be questions for the Photoswipe developer. Did you see the info in the docs?https://photoswipe.com/documentation/options.html

And maybe check the github issues first

https://github.com/dimsemenov/PhotoSwipe/search?q=lazyLoad&type=Issues&utf8=%E2%9C%93

Generally I’m not a fan of lazyloads. It has never worked well for me.