Interactivity API: Skip binding event handler attributes. The corresponding data-wp-on-- attribute should be used instead.

Merges [61885] to the 6.9 branch.
Props luisherranz, peterwilsoncc, johnbillion, ocean90, jorbin, xknown.



git-svn-id: https://develop.svn.wordpress.org/branches/6.9@61896 602fd350-edb4-49c9-b593-d223f7449a82

Author: audrasjb

src/wp-includes/interactivity-api/class-wp-interactivity-api.php

@@ -1032,6 +1032,20 @@ private function data_wp_bind_processor( WP_Interactivity_API_Directives_Process
 						return;
 				}
 
+				// Skip if the suffix is an event handler.
+				if ( str_starts_with( $entry['suffix'], 'on' ) ) {
+					_doing_it_wrong(
+						__METHOD__,
+						sprintf(
+							/* translators: %s: The directive, e.g. data-wp-on--click. */
+							__( 'Binding event handler attributes is not supported. Please use "%s" instead.' ),
+							esc_attr( 'data-wp-on--' . substr( $entry['suffix'], 2 ) )
+						),
+						'6.9.2'
+					);
+					continue;
+				}
+
 				$result = $this->evaluate( $entry );
 
 				if (