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Attributes And Serialization · Wp Block Development · WordPress/agent-skills · Skills Docs

Repo No. 26 · Wp Block Development

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19 skills · 52 min

Skill 06 · Wp Block Development

Subchapter 6.1

Attributes And Serialization

references/attributes-and-serialization.mdMarkdown759 BView on GitHub

Use this file when attributes aren’t saving, content becomes “Invalid block”, or you’re changing markup.

How attributes persist

Attributes can come from:

the comment delimiter JSON (common and stable)
the block’s saved HTML (from tags/attributes)

6Up to skill 6Wp Block Development

On this page

How attributes persist
Common pitfalls

This file

Number: 6.1
Position: 1 of 11
Type: Markdown
Size: 759 B

Nearby

Next Block JSON

Source

references/attributes-and-serialization.md

context

Read the canonical guide for supported source/selector/attribute patterns:

https://developer.wordpress.org/block-editor/reference-guides/block-api/block-attributes/ (opens in a new tab)

Common pitfalls

Changing saved HTML without a deprecated version breaks existing posts.
Using the meta attribute source (deprecated) causes long-term pain; avoid it.
Choosing brittle selectors leads to attributes “not found” when markup changes slightly.

First file of the skillBack to Wp Block DevelopmentReferenceBlock JSON

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