Attributes: what do the source and selector properties do?

[bph]

Discussed in #138

^{Originally posted by mburridge June 29, 2023}
Block attributes are typically stored in the comment delimiter, and the values are fetched from there when the block is parsed to be displayed in the editor. But did you know that attribute values can also be stored in the block content? You can use the source and selector properties to determine where in the saved block the attribute values are fetched from at parse time.

This post will be an introduction to using and saving attributes - basically a friendlier and more tutorial-based version of the content in the Attributes page in the handbook, and with more examples.

[mburridge]

A draft of this post is now ready for review.

[mburridge]

A public preview of the attributes post is now available for review:
https://developer.wordpress.org/news/?p=1981&preview=1&_ppp=ec5d6c5e35

[mburridge]

Pre and post publishing checklist:

• Post Title in Sentence case
• Are Category or Categories selected?
• Are Tags identifies?
• Is there an explicit Excerpt?
• Props added?
• 🙌 Publish! 📗
• add Props for reviews to #props channel in WP Slack
• close the issue with a comment to link to the published post
• close the accompanying discussion with w link to the publish post.

[bph]

Hi @mburridge
I really like that you want through the topic one step at a time. This is an excellent post for beginners.

• added one more subheader at the beginning
• added a Table of contents.
• added alt-text to all images (was missing from your copy of the pre-publish checklist)
• uploaded all images from Google doc
• selected the social image.

I went ahead and published it. 🚢

Hope, you are ok with the small changes.

Please review your post-publish check from this issue

[mburridge]

Now published: https://developer.wordpress.org/news/2023/09/understanding-block-attributes/