Lazy Loading Advice

I have a site wih many images I have to design, now the only way I can pull this off is with lazy loading. I have tried some plugins but they all seem to have some issues with Gavick .js scripts. I have yet to start targeting divs.

So I'm asking for some advice from the editors, based on the strengths and limitations of the .js scripts developed by Gavick, what would be the best way of compressing js, and lazy loading?