Hey Weston, thanks for reply!
I’m confused why you are needing to use PHP functions in the Mustache template. All of the data being rendered should be coming from the REST API response, no?
Well, there are lot of reasons, but firstly — speed. It is way much faster to use <get_the_post_thumbnail($id)> instead of write a bunch of stuff with all thouse srcset, sizes etc.
Now I know, AMP render mustache tags on client, so there is no way to use it in php template
closed