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| author | 8cy <[email protected]> | 2020-04-03 02:37:42 -0700 |
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| committer | 8cy <[email protected]> | 2020-04-03 02:37:42 -0700 |
| commit | 60867fb030bae582082340ead7dbc7efdc2f5398 (patch) | |
| tree | 4c6a7356351be2e4914e15c4703172597c45656e /node_modules/node-addon-api/doc/promises.md | |
| parent | commenting (diff) | |
| download | s5nical-60867fb030bae582082340ead7dbc7efdc2f5398.tar.xz s5nical-60867fb030bae582082340ead7dbc7efdc2f5398.zip | |
2020/04/03, 02:34, v1.2.0
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| -rw-r--r-- | node_modules/node-addon-api/doc/promises.md | 74 |
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diff --git a/node_modules/node-addon-api/doc/promises.md b/node_modules/node-addon-api/doc/promises.md new file mode 100644 index 0000000..6252900 --- /dev/null +++ b/node_modules/node-addon-api/doc/promises.md @@ -0,0 +1,74 @@ +# Promise + +The `Napi::Promise` class, along with its `Napi::Promise::Deferred` class, implement the ability to create, resolve, and reject Promise objects. + +The basic approach is to create a `Napi::Promise::Deferred` object and return to your caller the value returned by the `Napi::Promise::Deferred::Promise` method. For example: + +```cpp +Napi::Value YourFunction(const Napi::CallbackInfo& info) { + // your code goes here... + Napi::Promise::Deferred deferred = Napi::Promise::Deferred::New(info.Env()); + // deferred needs to survive this call... + return deferred.Promise(); +} +``` + +Later, when the asynchronous process completes, call either the `Resolve` or `Reject` method on the `Napi::Promise::Deferred` object created earlier: + +```cpp + deferred.Resolve(String::New(info.Env(), "OK")); +``` + +## Promise::Deferred Methods + +### Factory Method + +```cpp +static Napi::Promise::Deferred Napi::Promise::Deferred::New(napi_env env); +``` + +* `[in] env`: The `napi_env` environment in which to create the `Napi::Promise::Deferred` object. + +### Constructor + +```cpp +Napi::Promise::Deferred(napi_env env); +``` + +* `[in] env`: The `napi_env` environment in which to construct the `Napi::Promise::Deferred` object. + +### Env + +```cpp +Napi::Env Napi::Promise::Deferred::Env() const; +``` + +Returns the Env environment this `Napi::Promise::Deferred` object is associated with. + +### Promise + +```cpp +Napi::Promise Napi::Promise::Deferred::Promise() const; +``` + +Returns the `Napi::Promise` object held by the `Napi::Promise::Deferred` object. + +### Resolve + +```cpp +void Napi::Promise::Deferred::Resolve(napi_value value) const; +``` + +Resolves the `Napi::Promise` object held by the `Napi::Promise::Deferred` object. + +* `[in] value`: The N-API primitive value with which to resolve the `Napi::Promise`. + +### Reject + +```cpp +void Napi::Promise::Deferred::Reject(napi_value value) const; +``` + +Rejects the Promise object held by the `Napi::Promise::Deferred` object. + +* `[in] value`: The N-API primitive value with which to reject the `Napi::Promise`. |