@@ -2639,6 +2639,7 @@ function kses_init() {
  * @since 7.1.0 Extended gradient support to allow any single-level nested function.
  *              Added support for transform functions, `clip-path` basic shapes,
  *              and URLs in the SVG element reference properties.
+ * @since 7.2.0 Added support for CSS anchor positioning properties.
  *
  * @param string $css        A string of CSS rules, decoded from an HTML `style` attribute.
  * @param string $deprecated Not used.
@@ -2885,6 +2886,15 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
 			'pointer-events',
 			'visibility',
 
+			'anchor-name',
+			'anchor-scope',
+			'position-anchor',
+			'position-area',
+			'position-try',
+			'position-try-fallbacks',
+			'position-try-order',
+			'position-visibility',
+
 			// Custom CSS properties.
 			'--*',
 		)
 
@@ -1225,6 +1225,7 @@ public function test_wp_kses_attr_no_attributes_allowed_with_false() {
 	 * @ticket 65457
 	 * @ticket 64974
 	 * @ticket 65832
+	 * @ticket 64972
 	 *
 	 * @dataProvider data_safecss_filter_attr
 	 *
@@ -1882,6 +1883,11 @@ public function data_safecss_filter_attr() {
 				'css'      => 'clip-path: url(javascript:alert(1))',
 				'expected' => '',
 			),
+			// CSS anchor positioning properties introduced in 7.2.
+			array(
+				'css'      => 'anchor-name: --tooltip;anchor-scope: all;position-anchor: --tooltip;position-area: top;position-try: flip-block;position-try-fallbacks: --fallback;position-try-order: most-height;position-visibility: anchors-visible',
+				'expected' => 'anchor-name: --tooltip;anchor-scope: all;position-anchor: --tooltip;position-area: top;position-try: flip-block;position-try-fallbacks: --fallback;position-try-order: most-height;position-visibility: anchors-visible',
+			),
 		);
 	}
Original file line number	Diff line number	Diff line change
`@@ -1225,6 +1225,7 @@ public function test_wp_kses_attr_no_attributes_allowed_with_false() {`
`1225`	`1225`	`* @ticket 65457`
`1226`	`1226`	`* @ticket 64974`
`1227`	`1227`	`* @ticket 65832`
	`1228`	`+ * @ticket 64972`
`1228`	`1229`	`*`
`1229`	`1230`	`* @dataProvider data_safecss_filter_attr`
`1230`	`1231`	`*`
`@@ -1882,6 +1883,11 @@ public function data_safecss_filter_attr() {`
`1882`	`1883`	`'css' => 'clip-path: url(javascript:alert(1))',`
`1883`	`1884`	`'expected' => '',`
`1884`	`1885`	`),`
	`1886`	`+ // CSS anchor positioning properties introduced in 7.2.`
	`1887`	`+ array(`
	`1888`	`+ 'css' => 'anchor-name: --tooltip;anchor-scope: all;position-anchor: --tooltip;position-area: top;position-try: flip-block;position-try-fallbacks: --fallback;position-try-order: most-height;position-visibility: anchors-visible',`
	`1889`	`+ 'expected' => 'anchor-name: --tooltip;anchor-scope: all;position-anchor: --tooltip;position-area: top;position-try: flip-block;position-try-fallbacks: --fallback;position-try-order: most-height;position-visibility: anchors-visible',`
	`1890`	`+ ),`
`1885`	`1891`	`);`
`1886`	`1892`	`}`
`1887`	`1893`