Add missing grid alignment utilities

[adamwathan]

This PR introduces utilities for place-items, place-content, place-self, justify-items, and justify-self. Responsive variants are generated for each by default.

I haven't added comprehensive coverage for each property just to keep things simple for now. When someone actually needs one that's missing, we can add it then.

Here's a complete list of what has been added:

Class	CSS
content-evenly	align-content: space-evenly
justify-items-auto	justify-items: auto
justify-items-start	justify-items: start
justify-items-end	justify-items: end
justify-items-center	justify-items: center
justify-items-stretch	justify-items: stretch
justify-self-auto	justify-self: auto
justify-self-start	justify-self: start
justify-self-end	justify-self: end
justify-self-center	justify-self: center
justify-self-stretch	justify-self: stretch
place-content-center	place-content: center
place-content-start	place-content: start
place-content-end	place-content: end
place-content-between	place-content: space-between
place-content-around	place-content: space-around
place-content-evenly	place-content: space-evenly
place-content-stretch	place-content: stretch
place-items-auto	place-items: auto
place-items-start	place-items: start
place-items-end	place-items: end
place-items-center	place-items: center
place-items-stretch	place-items: stretch
place-self-auto	place-self: auto
place-self-start	place-self: start
place-self-end	place-self: end
place-self-center	place-self: center
place-self-stretch	place-self: stretch

Closes #2241.

[benface]

@adamwathan What do you think about adding justify-content-*, align-content-*, and align-items-* utilities that would simply be aliases for justify-*, content-*, and items-*?

[adamwathan]

I've thought about it but don't think it's great to have two ways to do something, and don't want to make the existing ones more verbose either since they are definitely the most commonly used ones. So for now just going to stick with the concise versions for the flexbox ones and verbose ones to disambiguate for the less common ones.

[IRediTOTO]

hmm why can't i find this in docs?

[adamwathan]

It was released yesterday and I haven’t had time.

https://twitter.com/adamwathan/status/1301978813165903876?s=21

[IRediTOTO]

It was released yesterday and I haven’t had time.

https://twitter.com/adamwathan/status/1301978813165903876?s=21

why dont you open for people edit homepage tailwind? I can wait :D Thank you for made taildwind, i very love it.

[adamwathan]

You can! Here’s the repo:

https://github.com/tailwindlabs/tailwindcss.com