It seems paper-elements are elements that have some distinctive visual characteristics that relate to Material Design – things like paper-input and paper-progress look and feel like it's of Material Design. For something like an autogrowing textarea a la paper-autogrow-textarea, however, it seems more standard, or "core". There's nothing about it that is specific to Material Design. As I am using none of the distinctive Material Design but wanted a autogrowing textarea, I find myself using all core-elements except in this case where I'm using paper-autogrow-textarea. No biggie, just sharing FWIW.
I agree the paper-autogrow-textarea probably should be split from paper-input since it's more general purpose. We're going to reorganize the element set in the next major release, stay tuned!
It seems paper-elements are elements that have some distinctive visual characteristics that relate to Material Design – things like
paper-input
andpaper-progress
look and feel like it's of Material Design. For something like an autogrowing textarea a lapaper-autogrow-textarea
, however, it seems more standard, or "core". There's nothing about it that is specific to Material Design. As I am using none of the distinctive Material Design but wanted a autogrowing textarea, I find myself using all core-elements except in this case where I'm usingpaper-autogrow-textarea
. No biggie, just sharing FWIW.