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# CallbackScope
There are cases (for example, resolving promises) where it is necessary to have
the equivalent of the scope associated with a callback in place when making
certain Node-API calls.
## Methods
### Constructor
Creates a new callback scope on the stack.
```cpp
Napi::CallbackScope::CallbackScope(napi_env env, napi_callback_scope scope);
```
- `[in] env`: The environment in which to create the `Napi::CallbackScope`.
- `[in] scope`: The pre-existing `napi_callback_scope` or `Napi::CallbackScope`.
### Constructor
Creates a new callback scope on the stack.
```cpp
Napi::CallbackScope::CallbackScope(napi_env env, napi_async_context context);
```
- `[in] env`: The environment in which to create the `Napi::CallbackScope`.
- `[in] async_context`: The pre-existing `napi_async_context` or `Napi::AsyncContext`.
### Destructor
Deletes the instance of `Napi::CallbackScope` object.
```cpp
virtual Napi::CallbackScope::~CallbackScope();
```
### Env
```cpp
Napi::Env Napi::CallbackScope::Env() const;
```
Returns the `Napi::Env` associated with the `Napi::CallbackScope`.
## Operator
```cpp
Napi::CallbackScope::operator napi_callback_scope() const;
```
Returns the Node-API `napi_callback_scope` wrapped by the `Napi::CallbackScope`
object. This can be used to mix usage of the C Node-API and node-addon-api.
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