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<title>[61014] trunk: Block visibility: Add block visibility support.</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/61014">61014</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/61014","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>cbravobernal</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2025-10-21 10:47:08 +0000 (Tue, 21 Oct 2025)</dd>
</dl>
<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 visibility: Add block visibility support.
Adds block support to control block visibility. This support will prevent blocks from being rendered on the frontend, i.e., server-side.
Props wildworks, mukesh27, rollybueno.
Fixes <a href="https://core.trac.wordpress.org/ticket/64061">#64061</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpsettingsphp">trunk/src/wp-settings.php</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesblocksupportsblockvisibilityphp">trunk/src/wp-includes/block-supports/block-visibility.php</a></li>
<li><a href="#trunktestsphpunittestsblocksupportsblockvisibilityphp">trunk/tests/phpunit/tests/block-supports/block-visibility.php</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesblocksupportsblockvisibilityphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/src/wp-includes/block-supports/block-visibility.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/block-supports/block-visibility.php (rev 0)
+++ trunk/src/wp-includes/block-supports/block-visibility.php 2025-10-21 10:47:08 UTC (rev 61014)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,33 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * Block visibility block support flag.
+ *
+ * @package WordPress
+ * @since 6.9.0
+ */
+
+/**
+ * Render nothing if the block is hidden.
+ *
+ * @since 6.9.0
+ * @access private
+ *
+ * @param string $block_content Rendered block content.
+ * @param array $block Block object.
+ * @return string Filtered block content.
+ */
+function wp_render_block_visibility_support( $block_content, $block ) {
+ $block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
+
+ if ( ! $block_type || ! block_has_support( $block_type, 'blockVisibility', true ) ) {
+ return $block_content;
+ }
+
+ if ( isset( $block['attrs']['metadata']['blockVisibility'] ) && false === $block['attrs']['metadata']['blockVisibility'] ) {
+ return '';
+ }
+
+ return $block_content;
+}
+
+add_filter( 'render_block', 'wp_render_block_visibility_support', 10, 2 );
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/src/wp-includes/block-supports/block-visibility.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunksrcwpsettingsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-settings.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-settings.php 2025-10-21 08:45:33 UTC (rev 61013)
+++ trunk/src/wp-settings.php 2025-10-21 10:47:08 UTC (rev 61014)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -393,6 +393,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> require ABSPATH . WPINC . '/block-supports/background.php';
</span><span class="cx" style="display: block; padding: 0 10px"> require ABSPATH . WPINC . '/block-supports/block-style-variations.php';
</span><span class="cx" style="display: block; padding: 0 10px"> require ABSPATH . WPINC . '/block-supports/aria-label.php';
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+require ABSPATH . WPINC . '/block-supports/block-visibility.php';
</ins><span class="cx" style="display: block; padding: 0 10px"> require ABSPATH . WPINC . '/style-engine.php';
</span><span class="cx" style="display: block; padding: 0 10px"> require ABSPATH . WPINC . '/style-engine/class-wp-style-engine.php';
</span><span class="cx" style="display: block; padding: 0 10px"> require ABSPATH . WPINC . '/style-engine/class-wp-style-engine-css-declarations.php';
</span></span></pre></div>
<a id="trunktestsphpunittestsblocksupportsblockvisibilityphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/tests/block-supports/block-visibility.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/block-supports/block-visibility.php (rev 0)
+++ trunk/tests/phpunit/tests/block-supports/block-visibility.php 2025-10-21 10:47:08 UTC (rev 61014)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,110 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * Test the block visibility block support.
+ *
+ * @package WordPress
+ * @subpackage Block Supports
+ * @since 6.9.0
+ *
+ * @group block-supports
+ *
+ * @covers ::wp_render_block_visibility_support
+ */
+class Tests_Block_Supports_Block_Visibility extends WP_UnitTestCase {
+ /**
+ * @var string|null
+ */
+ private $test_block_name;
+
+ public function set_up() {
+ parent::set_up();
+ $this->test_block_name = null;
+ }
+
+ public function tear_down() {
+ unregister_block_type( $this->test_block_name );
+ $this->test_block_name = null;
+ parent::tear_down();
+ }
+
+ /**
+ * Registers a new block for testing block visibility support.
+ *
+ * @param string $block_name Name for the test block.
+ * @param array $supports Array defining block support configuration.
+ *
+ * @return WP_Block_Type The block type for the newly registered test block.
+ */
+ private function register_visibility_block_with_support( $block_name, $supports = array() ) {
+ $this->test_block_name = $block_name;
+ register_block_type(
+ $this->test_block_name,
+ array(
+ 'api_version' => 3,
+ 'attributes' => array(
+ 'metadata' => array(
+ 'type' => 'object',
+ ),
+ ),
+ 'supports' => $supports,
+ )
+ );
+ $registry = WP_Block_Type_Registry::get_instance();
+
+ return $registry->get_registered( $this->test_block_name );
+ }
+
+ /**
+ * Tests that block visibility support renders empty string when block is hidden
+ * and blockVisibility support is opted in.
+ *
+ * @ticket 64061
+ */
+ public function test_block_visibility_support_hides_block_when_visibility_false() {
+ $block_type = $this->register_visibility_block_with_support(
+ 'test/visibility-block',
+ array( 'blockVisibility' => true )
+ );
+
+ $block_content = '<p>This is a test block.</p>';
+ $block = array(
+ 'blockName' => 'test/visibility-block',
+ 'attrs' => array(
+ 'metadata' => array(
+ 'blockVisibility' => false,
+ ),
+ ),
+ );
+
+ $result = wp_render_block_visibility_support( $block_content, $block );
+
+ $this->assertSame( '', $result, 'Block content should be empty when blockVisibility is false and support is opted in.' );
+ }
+
+ /**
+ * Tests that block visibility support renders block normally when visibility is false
+ * but blockVisibility support is not opted in.
+ *
+ * @ticket 64061
+ */
+ public function test_block_visibility_support_shows_block_when_support_not_opted_in() {
+ $block_type = $this->register_visibility_block_with_support(
+ 'test/visibility-block',
+ array( 'blockVisibility' => false )
+ );
+
+ $block_content = '<p>This is a test block.</p>';
+ $block = array(
+ 'blockName' => 'test/visibility-block',
+ 'attrs' => array(
+ 'metadata' => array(
+ 'blockVisibility' => false,
+ ),
+ ),
+ );
+
+ $result = wp_render_block_visibility_support( $block_content, $block );
+
+ $this->assertSame( $block_content, $result, 'Block content should remain unchanged when blockVisibility support is not opted in.' );
+ }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/phpunit/tests/block-supports/block-visibility.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span></div>
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