Any block can opt into these alignments. The embed block has them also, and is responsive out of the box:
You can build any block you like, static or dynamic, decorative or plain. Here’s a pullquote block:
Code is Poetry
The WordPress community
If you want to learn more about how to build additional blocks, or if you are interested in helping with the project, head over to the GitHub repository.
Thanks for testing Gutenberg!
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