javascript - What is app shell? What are the standard definitions or learning materials or usage?

Question

When looking up relevant information about pwa and vue-ssr, this term was mentioned repeatedly, but there are few relevant explanations and introductions online, so I have this question~

Answer 1

I don’t know about vue-ssr, but as far as I know, there is no clear definition in pwa. In fact, it is just some html elements. Let’s take one of my pwa as an example https://neal1991.github.io/ pwa is an example. The header part can be understood as app shell. For more information about app shell, please refer to https://developers.google.com...