expand modification after init

[tomasmozeris]

Hey, thanks for great library!

I would like not lazyload off screen images until first user action, my config contains:
lazySizes.cfg.expand = 1
On first user action I'm changing expand value:
lazySizes.cfg.expand = 500
However preloadExpand has been already set and this config modification has no effect so I end up commenting statement:
if(preloadExpand == null)
Any chances in future release config modifications would be taking into account after init?

[aFarkas]

This is basically already done by lazySizes.cfg.loadMode. Simply set it to 1 initially.

[tomasmozeris]

With loadMode: 1 bellow the fold images is loaded after load event. Lets say 90% of my users clicks CTA on hero image, so I'm waisting their bandwidth. I guess I could play around with data-expand and after first scroll modify attribute or loader.unveil images I wish, but still I believe modifying expand after init would be useful.

Sorry for bothering with minor things, I'll see if I can find meaningful solution and PR it

[aFarkas]

I see the general usefulness of being able to change the expand option dynamically so I have changed it. But to be honest in your case it is probably just some kind of premature optimization.