diff -r 34716fd837a4 -r be944660c56a wp/wp-includes/block-supports/elements.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/block-supports/elements.php	Wed Sep 21 18:19:35 2022 +0200
@@ -0,0 +1,71 @@
+<?php
+/**
+ * Elements styles block support.
+ *
+ * @package WordPress
+ * @since 5.8.0
+ */
+
+/**
+ * Render the elements stylesheet.
+ *
+ * @since 5.8.0
+ * @access private
+ *
+ * @param  string $block_content Rendered block content.
+ * @param  array  $block         Block object.
+ * @return string                Filtered block content.
+ */
+function wp_render_elements_support( $block_content, $block ) {
+	$link_color = null;
+	if ( ! empty( $block['attrs'] ) ) {
+		$link_color = _wp_array_get( $block['attrs'], array( 'style', 'elements', 'link', 'color', 'text' ), null );
+	}
+
+	/*
+	* For now we only care about link color.
+	* This code in the future when we have a public API
+	* should take advantage of WP_Theme_JSON::compute_style_properties
+	* and work for any element and style.
+	*/
+	if ( null === $link_color ) {
+		return $block_content;
+	}
+
+	$class_name = 'wp-elements-' . uniqid();
+
+	if ( strpos( $link_color, 'var:preset|color|' ) !== false ) {
+		// Get the name from the string and add proper styles.
+		$index_to_splice = strrpos( $link_color, '|' ) + 1;
+		$link_color_name = substr( $link_color, $index_to_splice );
+		$link_color      = "var(--wp--preset--color--$link_color_name)";
+	}
+	$link_color_declaration = esc_html( safecss_filter_attr( "color: $link_color" ) );
+
+	$style = "<style>.$class_name a{" . $link_color_declaration . " !important;}</style>\n";
+
+	// Like the layout hook this assumes the hook only applies to blocks with a single wrapper.
+	// Retrieve the opening tag of the first HTML element.
+	$html_element_matches = array();
+	preg_match( '/<[^>]+>/', $block_content, $html_element_matches, PREG_OFFSET_CAPTURE );
+	$first_element = $html_element_matches[0][0];
+	// If the first HTML element has a class attribute just add the new class
+	// as we do on layout and duotone.
+	if ( strpos( $first_element, 'class="' ) !== false ) {
+		$content = preg_replace(
+			'/' . preg_quote( 'class="', '/' ) . '/',
+			'class="' . $class_name . ' ',
+			$block_content,
+			1
+		);
+	} else {
+		// If the first HTML element has no class attribute we should inject the attribute before the attribute at the end.
+		$first_element_offset = $html_element_matches[0][1];
+		$content              = substr_replace( $block_content, ' class="' . $class_name . '"', $first_element_offset + strlen( $first_element ) - 1, 0 );
+	}
+
+	return $content . $style;
+
+}
+
+add_filter( 'render_block', 'wp_render_elements_support', 10, 2 );