Attributes: what do the source and selector properties do?

[mburridge]

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.

[justintadlock]

Sounds like a good topic, @mburridge. We could definitely use a post exploring this.

[bph]

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• Attributes: what do the source and selector properties do? #147

[mburridge]

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