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<title>[60807] trunk/src/wp-includes: Block Bindings: Communicate supported block attributes from server.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/60807">60807</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/60807","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>Bernhard Reiter</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2025-09-29 08:57:51 +0000 (Mon, 29 Sep 2025)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Block Bindings: Communicate supported block attributes from server.
Instead of requiring the client side to keep a separate list of block attributes that are supported by Block Bindings, communicate that list from the server -- including block attributes that were added there via the `block_bindings_supported_attributes` filter.
Props bernhard-reiter, mukesh27, gziolo.
Fixes <a href="https://core.trac.wordpress.org/ticket/64030">#64030</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesblockbindingsphp">trunk/src/wp-includes/block-bindings.php</a></li>
<li><a href="#trunksrcwpincludesblockeditorphp">trunk/src/wp-includes/block-editor.php</a></li>
<li><a href="#trunksrcwpincludesclasswpblockphp">trunk/src/wp-includes/class-wp-block.php</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesblockbindingsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/block-bindings.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/block-bindings.php 2025-09-28 23:38:57 UTC (rev 60806)
+++ trunk/src/wp-includes/block-bindings.php 2025-09-29 08:57:51 UTC (rev 60807)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -129,3 +129,56 @@
</span><span class="cx" style="display: block; padding: 0 10px"> function get_block_bindings_source( string $source_name ) {
</span><span class="cx" style="display: block; padding: 0 10px"> return WP_Block_Bindings_Registry::get_instance()->get_registered( $source_name );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+/**
+ * Retrieves the list of block attributes supported by block bindings.
+ *
+ * @since 6.9.0
+ *
+ * @param string $block_type The block type whose supported attributes are being retrieved.
+ * @return array The list of block attributes that are supported by block bindings.
+ */
+function get_block_bindings_supported_attributes( $block_type ) {
+ $block_bindings_supported_attributes = array(
+ 'core/paragraph' => array( 'content' ),
+ 'core/heading' => array( 'content' ),
+ 'core/image' => array( 'id', 'url', 'title', 'alt', 'caption' ),
+ 'core/button' => array( 'url', 'text', 'linkTarget', 'rel' ),
+ 'core/post-date' => array( 'datetime' ),
+ );
+
+ $supported_block_attributes =
+ $block_bindings_supported_attributes[ $block_type ] ??
+ array();
+
+ /**
+ * Filters the supported block attributes for block bindings.
+ *
+ * @since 6.9.0
+ *
+ * @param string[] $supported_block_attributes The block's attributes that are supported by block bindings.
+ * @param string $block_type The block type whose attributes are being filtered.
+ */
+ $supported_block_attributes = apply_filters(
+ 'block_bindings_supported_attributes',
+ $supported_block_attributes,
+ $block_type
+ );
+
+ /**
+ * Filters the supported block attributes for block bindings.
+ *
+ * The dynamic portion of the hook name, `$block_type`, refers to the block type
+ * whose attributes are being filtered.
+ *
+ * @since 6.9.0
+ *
+ * @param string[] $supported_block_attributes The block's attributes that are supported by block bindings.
+ */
+ $supported_block_attributes = apply_filters(
+ "block_bindings_supported_attributes_{$block_type}",
+ $supported_block_attributes
+ );
+
+ return $supported_block_attributes;
+}
</ins></span></pre></div>
<a id="trunksrcwpincludesblockeditorphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/block-editor.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/block-editor.php 2025-09-28 23:38:57 UTC (rev 60806)
+++ trunk/src/wp-includes/block-editor.php 2025-09-29 08:57:51 UTC (rev 60807)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -496,6 +496,14 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $custom_settings
</span><span class="cx" style="display: block; padding: 0 10px"> );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $editor_settings['__experimentalBlockBindingsSupportedAttributes'] = array();
+ foreach ( array_keys( WP_Block_Type_Registry::get_instance()->get_all_registered() ) as $block_type ) {
+ $supported_block_attributes = get_block_bindings_supported_attributes( $block_type );
+ if ( ! empty( $supported_block_attributes ) ) {
+ $editor_settings['__experimentalBlockBindingsSupportedAttributes'][ $block_type ] = $supported_block_attributes;
+ }
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> $global_styles = array();
</span><span class="cx" style="display: block; padding: 0 10px"> $presets = array(
</span><span class="cx" style="display: block; padding: 0 10px"> array(
</span></span></pre></div>
<a id="trunksrcwpincludesclasswpblockphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/class-wp-block.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/class-wp-block.php 2025-09-28 23:38:57 UTC (rev 60806)
+++ trunk/src/wp-includes/class-wp-block.php 2025-09-29 08:57:51 UTC (rev 60807)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -99,22 +99,6 @@
</span><span class="cx" style="display: block; padding: 0 10px"> public $inner_content = array();
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * List of supported block attributes for block bindings.
- *
- * @since 6.9.0
- * @var array
- *
- * @see WP_Block::process_block_bindings()
- */
- private const BLOCK_BINDINGS_SUPPORTED_ATTRIBUTES = array(
- 'core/paragraph' => array( 'content' ),
- 'core/heading' => array( 'content' ),
- 'core/image' => array( 'id', 'url', 'title', 'alt', 'caption' ),
- 'core/button' => array( 'url', 'text', 'linkTarget', 'rel' ),
- 'core/post-date' => array( 'datetime' ),
- );
-
- /**
</del><span class="cx" style="display: block; padding: 0 10px"> * Constructor.
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="cx" style="display: block; padding: 0 10px"> * Populates object properties from the provided block instance argument.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -297,39 +281,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $block_type = $this->name;
</span><span class="cx" style="display: block; padding: 0 10px"> $parsed_block = $this->parsed_block;
</span><span class="cx" style="display: block; padding: 0 10px"> $computed_attributes = array();
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $supported_block_attributes =
- self::BLOCK_BINDINGS_SUPPORTED_ATTRIBUTES[ $block_type ] ??
- array();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $supported_block_attributes = get_block_bindings_supported_attributes( $block_type );
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- /**
- * Filters the supported block attributes for block bindings.
- *
- * @since 6.9.0
- *
- * @param string[] $supported_block_attributes The block's attributes that are supported by block bindings.
- * @param string $block_type The block type whose attributes are being filtered.
- */
- $supported_block_attributes = apply_filters(
- 'block_bindings_supported_attributes',
- $supported_block_attributes,
- $block_type
- );
-
- /**
- * Filters the supported block attributes for block bindings.
- *
- * The dynamic portion of the hook name, `$block_type`, refers to the block type
- * whose attributes are being filtered.
- *
- * @since 6.9.0
- *
- * @param string[] $supported_block_attributes The block's attributes that are supported by block bindings.
- */
- $supported_block_attributes = apply_filters(
- "block_bindings_supported_attributes_{$block_type}",
- $supported_block_attributes
- );
-
</del><span class="cx" style="display: block; padding: 0 10px"> // If the block doesn't have the bindings property, isn't one of the supported
</span><span class="cx" style="display: block; padding: 0 10px"> // block types, or the bindings property is not an array, return the block content.
</span><span class="cx" style="display: block; padding: 0 10px"> if (
</span></span></pre>
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