Current Dev State

static/js/ketcher2/node_modules/nan/doc/callback.md

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+## Nan::Callback
+
+`Nan::Callback` makes it easier to use `v8::Function` handles as callbacks. A class that wraps a `v8::Function` handle, protecting it from garbage collection and making it particularly useful for storage and use across asynchronous execution.
+
+ - <a href="#api_nan_callback"><b><code>Nan::Callback</code></b></a>
+
+<a name="api_nan_callback"></a>
+### Nan::Callback
+
+```c++
+class Callback {
+ public:
+  Callback();
+
+  explicit Callback(const v8::Local<v8::Function> &fn);
+
+  ~Callback();
+
+  bool operator==(const Callback &other) const;
+
+  bool operator!=(const Callback &other) const;
+
+  v8::Local<v8::Function> operator*() const;
+
+  v8::Local<v8::Value> operator()(v8::Local<v8::Object> target,
+                                  int argc = 0,
+                                  v8::Local<v8::Value> argv[] = 0) const;
+
+  v8::Local<v8::Value> operator()(int argc = 0,
+                                  v8::Local<v8::Value> argv[] = 0) const;
+
+  void SetFunction(const v8::Local<v8::Function> &fn);
+
+  v8::Local<v8::Function> GetFunction() const;
+
+  bool IsEmpty() const;
+
+  void Reset(const v8::Local<v8::Function> &fn);
+
+  void Reset();
+
+  v8::Local<v8::Value> Call(v8::Local<v8::Object> target,
+                            int argc,
+                            v8::Local<v8::Value> argv[]) const;
+
+  v8::Local<v8::Value> Call(int argc, v8::Local<v8::Value> argv[]) const;
+};
+```
+
+Example usage:
+
+```c++
+v8::Local<v8::Function> function;
+Nan::Callback callback(function);
+callback.Call(0, 0);
+```