diff --git a/wp-includes/default-filters.php b/wp-includes/default-filters.php
index 936bbb6a86..a194582657 100644
--- a/wp-includes/default-filters.php
+++ b/wp-includes/default-filters.php
@@ -628,7 +628,8 @@ add_action( 'wp_footer', 'wp_enqueue_stored_styles', 1 );
add_action( 'wp_default_styles', 'wp_default_styles' );
add_filter( 'style_loader_src', 'wp_style_loader_src', 10, 2 );
-add_action( 'wp_head', 'wp_print_auto_sizes_contain_css_fix', 1 );
+add_action( 'wp_head', 'wp_enqueue_img_auto_sizes_contain_css_fix', 0 ); // Must run before wp_print_auto_sizes_contain_css_fix().
+add_action( 'wp_head', 'wp_print_auto_sizes_contain_css_fix', 1 ); // Retained for backwards-compatibility. Unhooked by wp_enqueue_img_auto_sizes_contain_css_fix().
add_action( 'wp_head', 'wp_maybe_inline_styles', 1 ); // Run for styles enqueued in .
add_action( 'wp_footer', 'wp_maybe_inline_styles', 1 ); // Run for late-loaded styles in the footer.
diff --git a/wp-includes/deprecated.php b/wp-includes/deprecated.php
index 7b5abfe52b..2569e5ad30 100644
--- a/wp-includes/deprecated.php
+++ b/wp-includes/deprecated.php
@@ -6460,4 +6460,32 @@ function wp_add_editor_classic_theme_styles( $editor_settings ) {
array_unshift( $editor_settings['styles'], $classic_theme_styles_settings );
return $editor_settings;
-}
\ No newline at end of file
+}
+
+/**
+ * Prints a CSS rule to fix potential visual issues with images using `sizes=auto`.
+ *
+ * This rule overrides the similar rule in the default user agent stylesheet, to avoid images that use e.g.
+ * `width: auto` or `width: fit-content` to appear smaller.
+ *
+ * @since 6.7.1
+ * @deprecated 6.9.0 Use wp_enqueue_img_auto_sizes_contain_css_fix() instead.
+ * @see wp_enqueue_img_auto_sizes_contain_css_fix()
+ *
+ * @see https://html.spec.whatwg.org/multipage/rendering.html#img-contain-size
+ * @see https://core.trac.wordpress.org/ticket/62413
+ * @see https://core.trac.wordpress.org/ticket/62731
+ */
+function wp_print_auto_sizes_contain_css_fix() {
+ _deprecated_function( __FUNCTION__, '6.9.0', 'wp_enqueue_img_auto_sizes_contain_css_fix' );
+
+ /** This filter is documented in wp-includes/media.php */
+ $add_auto_sizes = apply_filters( 'wp_img_tag_add_auto_sizes', true );
+ if ( ! $add_auto_sizes ) {
+ return;
+ }
+
+ ?>
+
+
-
- queue, $handle );
}
/**
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 5eb6b33758..7ea3ee258c 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
*
* @global string $wp_version
*/
-$wp_version = '6.9-alpha-60909';
+$wp_version = '6.9-alpha-60910';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.