如何调试Node.js服务器?调试器跳过了我的断点！ (使用VSCode) [英] How to debug a Node.js server? The debugger skips my breakpoints! (Using VSCode)

问题描述

我正在尝试使用自定义服务器调试Next.js应用，该服务器通常使用执行node server.js的dev Yarn脚本运行.

I'm trying to debug a Next.js app with a custom server which I normally run with a dev Yarn script that executes node server.js.

VSCode包括一个Node.js调试扩展程序和本指南， ve跟着.我创建了一个名为dev:debug的新纱线脚本，该脚本运行node --inspect server.js，并在launch.json中进行以下配置:

VSCode includes a Node.js debugging extension and this guide, which I've followed. I created a new Yarn script called dev:debug that runs node --inspect server.js, and the following configuration in launch.json:

{
  "type": "node",
  "request": "launch",
  "name": "Debug via Yarn",
  "runtimeExecutable": "yarn",
  "runtimeArgs": ["dev:debug"],
  "port": 9229
}

但是，跳过了server.js导入的模块中的某些断点，我不确定为什么.当我在Web应用程序中加载页面时，Next组件中的其他断点会起作用.有什么想法吗?

However some breakpoints in modules imported by server.js are skipped and I'm not sure why. Other breakpoints in Next components do work when I load pages in my web app. Any ideas?

推荐答案

好！这是正在发生的事情(由于无法在线找到答案，我将所有这些信息都发布到了SO中):

OK! Here's what's happening (and I'm posting all this to SO because I couldn't find the answer online):

构建Next.js应用程序时，您要同时编写服务器应用程序(节点)和服务器端Web应用程序(下一个)，这是分开的事情！此外，您还基于此构建一个客户端应用程序(React). (如果您习惯使用诸如内置服务器，Apache或NginX之类的服务器的PHP或Python Web应用程序之类的其他平台，这并不明显！)

When you build a Next.js app, you're writing BOTH the server app (node), AND the server-side web app (next), which are separate things! Additionally, you're also building a client-side app (React) on top of that. (If you're used to other platforms like PHP or Python web apps that use servers like the built-in ones, Apache, or NginX, this isn't obvious!)

运行node --inspect server.js告诉调试器加载服务器，然后仅开始调试Web应用程序(用户代码").

Running node --inspect server.js tells the debugger to load the server and THEN start debugging your web app ONLY ("user code").

解决方案:node CLI具有特殊的--inspect-brk 选项！是的，解决方案是再添加4个字符(-brk).

Solution: node CLI has a special --inspect-brk option to use when you also want to debug the code of the server itself! Yep, the solution is 4 more characters (-brk).

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