child_process生成无法获取下载处理

Question

我要捕获npm安装处理状态，包括下载文件列表 这是我的代码：

const { spawn } = require('child_process');
const install = spawn('npm',['install','--save', $anyPackageName],{env:process.env,cwd:$projPath});

install.stdout.on('data',(data)=>{
    console.log(data);    // I want to get downloading process here with downloading status
                          // only result shows without downloading process

})

谢谢你