I am using bootstrap-vue package in my project. The module includes web-types that are supposed to help with code completion in templates. However, in PyCharm it doesn't seem to work. I get an "unknown HTML tag" hint even tho it does work. On the other hand, WebStorm seems to have this issue resolved and the same project open in WebStorm knows the tags and helps with code completion. I think it should work on both IDEs the same way.