napi_key_filter

typedef enum {
  napi_key_all_properties = 0,
  napi_key_writable = 1,
  napi_key_enumerable = 1 << 1,
  napi_key_configurable = 1 << 2,
  napi_key_skip_strings = 1 << 3,
  napi_key_skip_symbols = 1 << 4
} napi_key_filter; 拷贝

属性过滤位标志。它与位运算符配合使用，可构建复合过滤器。

¥Property filter bit flag. This works with bit operators to build a composite filter.