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callback_scope.md
[add] server:lib:node_modules
Christian Fraß
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at 2021-03-08 23:52:07
callback_scope.md
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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 N-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 N-API `napi_callback_scope` wrapped by the `Napi::CallbackScope` object. This can be used to mix usage of the C N-API and node-addon-api.