and by checking, for all external libraries that it uses, that the external

library makes ABI stability guarantees similar to Node-API.

### Enum values in ABI stability

All enum data types defined in Node-API should be considered as a fixed size

`int32_t` value. Bit flag enum types should be explicitly documented, and they

work with bit operators like bit-OR (`|`) as a bit value. Unless otherwise

documented, an enum type should be considered to be extensible.

A new enum value will be added at the end of the enum definition. An enum value

will not be removed or renamed.

For an enum type returned from a Node-API function, or provided as an out

parameter of a Node-API function, the value is an integer value and an addon

should handle unknown values. New values are allowed to be introduced without

a version guard. For example, when checking `napi_status` in switch statements,

an addon should include a default branch, as new status codes may be introduced

in newer Node.js versions.

For an enum type used in an in-parameter, the result of passing an unknown

integer value to Node-API functions is undefined unless otherwise documented.

A new value is added with a version guard to indicate the Node-API version in

which it was introduced. For example, `napi_get_all_property_names` can be

extended with new enum value of `napi_key_filter`.

For an enum type used in both in-parameters and out-parameters, new values are

allowed to be introduced without a version guard.

## Building

Unlike modules written in JavaScript, developing and deploying Node.js

} napi_key_filter;

```

Property filter bits. They can be or'ed to build a composite filter.

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

#### `napi_key_conversion`

} napi_property_attributes;

```

`napi_property_attributes` are flags used to control the behavior of properties

set on a JavaScript object. Other than `napi_static` they correspond to the

attributes listed in [Section property attributes][]

`napi_property_attributes` are bit flags used to control the behavior of

properties set on a JavaScript object. Other than `napi_static` they

correspond to the attributes listed in [Section property attributes][]

of the [ECMAScript Language Specification][].

They can be one or more of the following bitflags:

They can be one or more of the following bit flags:

* `napi_default`: No explicit attributes are set on the property. By default, a

property is read only, not enumerable and not configurable.