get_data( $handle, $attr ) ) { continue; } // Prevent adding attribute when already added in #12009. if ( ! preg_match( ":\s$attr(=|>|\s):", $tag ) ) { $tag = preg_replace( ':(?=>):', " $attr", $tag, 1 ); } // Only allow async or defer, not both. break; } return $tag; } } }