remove_attribute example

        }

        $this->classname_updates = array();
        if ( ! $modified ) {
            return;
        }

        if ( strlen( $class ) > 0 ) {
            $this->set_attribute( 'class', $class );
        } else {
            $this->remove_attribute( 'class' );
        }
    }

    /** * Applies attribute updates to HTML document. * * @since 6.2.0 * @since 6.2.1 Accumulates shift for internal cursor and passed pointer. * @since 6.3.0 Invalidate any bookmarks whose targets are overwritten. * * @param int $shift_this_point Accumulate and return shift for this position. * @return int How many bytes the given pointer moved in response to the updates. */