Use one image in multiple places

I have images which all load on page load (SPA). Those same images are used in several modals. I’m working on a PWA where I’d like users to be able to view data offline. The initial images are all available offline, but the ones in the modals are not if the modal for that record hasn’t been opened. Is there a way to use the same cached image from the front page in the modals?

Thanks for any pointers!