c 执行js函数

#include <v8.h>
#include <libplatform/libplatform.h>
#include <iostream>

int main(int argc, char* argv[]) {
    // Initialize V8.
    v8::V8::InitializeICUDefaultLocation(argv[0]);
    v8::V8::InitializeExternalStartupData(argv[0]);
    std::unique_ptr<v8::Platform> platform = v8::platform::NewDefaultPlatform();
    v8::V8::InitializePlatform(platform.get());
    v8::V8::Initialize();

    // Create a new Isolate and make it the current one.
    v8::Isolate::CreateParams create_params;
    create_params.array_buffer_allocator =
        v8::ArrayBuffer::Allocator::NewDefaultAllocator();
    v8::Isolate* isolate = v8::Isolate::New(create_params);
    {
        v8::Isolate::Scope isolate_scope(isolate);
        v8::HandleScope handle_scope(isolate);
        v8::Local<v8::Context> context = v8::Context::New(isolate);
        v8::Context::Scope context_scope(context);

        // Define a JavaScript function
        const char* js_source = R"(
            function add(a, b) {
                return a + b;
            }
            add(2, 3);
        )";

        // Compile and run the JavaScript code
        v8::Local<v8::String> source =
            v8::String::NewFromUtf8(isolate, js_source,
                                     v8::NewStringType::kNormal).ToLocalChecked();
        v8::Local<v8::Script> script =
            v8::Script::Compile(context, source).ToLocalChecked();
        v8::Local<v8::Value> result = script->Run(context).ToLocalChecked();

        // Convert the result to an int
        int32_t int_result = result->Int32Value(context).ToChecked();
        std::cout << "Result of add function: " << int_result << std::endl;
    }

    // Dispose the isolate and tear down V8.
    isolate->Dispose();
    v8::V8::Dispose();
    v8::V8::ShutdownPlatform();
    delete create_params.array_buffer_allocator;

    return 0;
}

// addon.cc
#include <node.h>

void CallJavaScriptFunction(const v8::FunctionCallbackInfo<v8::Value>& args) {
    v8::Isolate* isolate = args.GetIsolate();
    v8::Local<v8::Context> context = isolate->GetCurrentContext();

    // Call a JavaScript function
    v8::Local<v8::String> js_source =
        v8::String::NewFromUtf8(isolate, "function add(a, b) { return a + b; } add(2, 3);",
                                 v8::NewStringType::kNormal).ToLocalChecked();
    v8::Local<v8::Script> script =
        v8::Script::Compile(context, js_source).ToLocalChecked();
    v8::Local<v8::Value> result = script->Run(context).ToLocalChecked();

    args.GetReturnValue().Set(result);
}

void Initialize(v8::Local<v8::Object> exports) {
    NODE_SET_METHOD(exports, "callJavaScriptFunction", CallJavaScriptFunction);
}

NODE_MODULE(addon, Initialize)

node-gyp configure build
node -e "const addon = require('./build/Release/addon'); console.log(addon.callJavaScriptFunction());"