%s%s%s ', $field['id'], esc_attr( json_encode( $field['js_options'] ) ), $field['prefix'], $meta, $field['suffix'], $field['field_name'], $meta ); } /** * Normalize parameters for field * * @param array $field * * @return array */ static function normalize_field( $field ) { $field = wp_parse_args( $field, array( 'prefix' => '', 'suffix' => '', 'js_options' => array(), ) ); $field['js_options'] = wp_parse_args( $field['js_options'], array( 'range' => 'min', // range = 'min' will add a dark background to sliding part, better UI ) ); return $field; } } }