c++使用quickjs执行JavaScript

环境 windows10 + clion 2024.x + MinGWx32 + quickjspp（2025-12-06）

直接使用官方的quickjs在windows系统坑比较多，所以使用 https://github.com/ftk/quickjspp 它是 QuickJS 的 c++ 包装

开始

下载 quickjspp 的源码直接使用 clion 2024.x打开 quickjspp-master，然后创建一个 main.cpp

#include "quickjspp.hpp"
#include <iostream>

class MyClass
{
public:
    MyClass() {}
    MyClass(std::vector<int>) {}

    double member_variable = 5.5;
    std::string member_function(const std::string& s) { return "Hello, " + s; }
};

void println(qjs::rest<std::string> args) {
    for (auto const & arg : args) std::cout << arg << " ";
    std::cout << "\n";
}

int main()
{
    qjs::Runtime runtime;
    qjs::Context context(runtime);
    try
    {
        // export classes as a module
        auto& module = context.addModule("MyModule");
        module.function<&println>("println");
        module.class_<MyClass>("MyClass")
                .constructor<>()
                .constructor<std::vector<int>>("MyClassA")
                .fun<&MyClass::member_variable>("member_variable")
                .fun<&MyClass::member_function>("member_function");
        // import module
        context.eval(R"xxx(
            import * as my from 'MyModule';
            globalThis.my = my;
        )xxx", "<import>", JS_EVAL_TYPE_MODULE);
        // evaluate js code
        context.eval(R"xxx(
            let v1 = new my.MyClass();
            v1.member_variable = 1;
            let v2 = new my.MyClassA([1,2,3]);
            function my_callback(str) {
              my.println("at callback:", v2.member_function(str));
            }
        )xxx");

        // callback
        auto cb = (std::function<void(const std::string&)>) context.eval("my_callback");
        cb("world");
    }
    catch(qjs::exception)
    {
        auto exc = context.getException();
        std::cerr << (std::string) exc << std::endl;
        if((bool) exc["stack"])
            std::cerr << (std::string) exc["stack"] << std::endl;
        return 1;
    }
}

修改 CMakeLists.txt 将执行指向 main

# add_executable(qjs qjs.cpp)
# 改为我们的 main.cpp
add_executable(qjs main.cpp)

cmake_minimum_required(VERSION 3.13)
project(quickjspp LANGUAGES CXX)

#set(CMAKE_CXX_STANDARD 17)
set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)

if(CMAKE_COMPILER_IS_GNUCC)
    add_compile_options(-Wall -Wno-unused-parameter)
endif()

add_subdirectory(quickjs)

add_library(quickjspp INTERFACE)
target_link_libraries(quickjspp INTERFACE quickjs ${CMAKE_REQUIRED_LIBRARIES})
target_compile_features(quickjspp INTERFACE cxx_std_17)
target_include_directories(quickjspp INTERFACE .)
set_target_properties(quickjspp PROPERTIES PUBLIC_HEADER quickjspp.hpp)

add_executable(qjs main.cpp)
target_link_libraries(qjs quickjspp)

# cmake -DBUILD_TESTING=OFF to disable tests
include(CTest)
if(BUILD_TESTING)
    add_subdirectory(test)
endif()

install(TARGETS quickjspp qjs)

Reload CMake Project 后直接起动 main即可

已有项目引用

将 CMakeLists.txt 内容复制到现有项目，修改即可。还需要复制：

• quickjs
• quickjspp.hpp

迁移截图如下：

cmake_minimum_required(VERSION 3.13)
project(demo_quickjspp LANGUAGES CXX)

#set(CMAKE_CXX_STANDARD 17)
set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)

if(CMAKE_COMPILER_IS_GNUCC)
    add_compile_options(-Wall -Wno-unused-parameter)
endif()

add_subdirectory(quickjs)

add_library(demo_quickjspp INTERFACE)
target_link_libraries(demo_quickjspp INTERFACE quickjs ${CMAKE_REQUIRED_LIBRARIES})
target_compile_features(demo_quickjspp INTERFACE cxx_std_17)
target_include_directories(demo_quickjspp INTERFACE .)
set_target_properties(demo_quickjspp PROPERTIES PUBLIC_HEADER demo_quickjspp.hpp)

add_executable(demo_quickjspp_win main.cpp)
target_link_libraries(demo_quickjspp_win demo_quickjspp)


install(TARGETS demo_quickjspp demo_quickjspp_win)