node.js 如何使用断点和所有内容调试节点 js 应用程序？
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How to debug node js app with breakpoints and everything?
提问by jayarjo
I've installed node-inspector just to find out that it doesn't support breakpoints :| What's the point in it at all, bearing in mind that on big part node code is asynchronous and you simply cannot follow it step by step?..
我安装了节点检查器只是为了发现它不支持断点：| 这有什么意义，记住大部分节点代码是异步的，你根本无法一步一步地遵循它？...
I'm definitely missing a point here...
我在这里肯定错过了一点......
Anyway to debug node code with breakpoints and everything?
无论如何要使用断点和所有内容调试节点代码？
采纳答案by Yuci
(For Node 8 and later)
（适用于节点 8 及更高版本）
Node.js has a built-in debugger. Normally you can turn on the debugger in two ways:
Node.js 有一个内置的调试器。通常，您可以通过两种方式打开调试器：
Start your Node.js app or script with the
--inspector--inspect-brkswitch. For example:$ node.js --inspect index.js
使用
--inspect或--inspect-brk开关启动您的 Node.js 应用程序或脚本。例如：$ node.js --inspect index.js
(Note: --inspect-brkbreaks before user code starts)
（注意：--inspect-brk在用户代码开始之前中断）
If for some reason you cannot start your Node.js app or script with the
--inspectswitch, you can still instruct the Node.js process to start listening for debugging messages by signalling it with SIGUSR1 (on Linux and OS X). For Node 8 and later it will activate the Inspector API, same as the --inspect switch$ kill -sigusr1 23485
如果由于某种原因您无法使用
--inspect开关启动 Node.js 应用程序或脚本，您仍然可以通过使用 SIGUSR1（在 Linux 和 OS X 上）发出信号来指示 Node.js 进程开始侦听调试消息。对于 Node 8 及更高版本，它将激活 Inspector API，与 --inspect 开关相同$ kill -sigusr1 23485
(Note: you need to replace 23485 with your own Node.js process ID)
（注意：23485 需要替换为自己的 Node.js 进程 ID）
With the debugger turned on, you can open the Google Chrome browser, and type in the address bar chrome://inspect
打开调试器后，您可以打开 Google Chrome 浏览器，然后在地址栏中输入 chrome://inspect
Then you should see an entry listed under "Remote Target". Go ahead and click "inspect".
然后您应该会看到在“远程目标”下列出的条目。继续并单击“检查”。
Now you can set breakpoints and start debugging your code.
现在您可以设置断点并开始调试您的代码。
Reference:
参考：
回答by rdrey
yupp, I've successfully used node-inspector. If you want permanentbreakpoints, simply insert debugger;in your code. See http://nodejs.org/api/debugger.html.
是的，我已经成功使用了节点检查器。如果您想要永久断点，只需debugger;在您的代码中插入即可。请参阅http://nodejs.org/api/debugger.html。
Making node wait until a debugger is attached, using node --inspect-brk script.js(previously node --debug-brk script.js), can also be very helpful.
使用node --inspect-brk script.js（以前的node --debug-brk script.js）使节点等待直到连接调试器也非常有帮助。
回答by Shekar Mania
To Debug a Node js application, one can use the debug inbuilt module
要调试 Node js 应用程序，可以使用 debug 内置模块
Insert debugger;statement where you want to insert breakpoints
debugger;在要插入断点的地方插入语句
Run the file with command node inspect index.js
使用命令运行文件 node inspect index.js
Press C to continue to next breakpoint
按C继续下一个断点
you can even debug values associated to variables at that breakpoint by typing repl
您甚至可以通过键入来调试与该断点处的变量关联的值 repl
For more information, Please Refer https://nodejs.org/api/debugger.html
回答by Alvaro
Have you tried using nodemonlibrary? it can be found here.
您是否尝试过使用nodemon库？可以在这里找到。
For development purposes you could start the app running nodemon. I have this script:
出于开发目的，您可以启动运行 nodemon 的应用程序。我有这个脚本：
"dev": "nodemon --inspect src/index.js"
"dev": "nodemon --inspect src/index.js"
It will break any time a debuggerstatement is reached in the code. To open the console where you can see the server code, open the console in chrome and click on the nodejs icon:
任何时候debugger在代码中到达语句时它都会中断。要打开可以看到服务器代码的控制台，请在 chrome 中打开控制台并单击 nodejs 图标：
It also helps you refreshing the server every time you save any file on the server.
每次在服务器上保存任何文件时，它还可以帮助您刷新服务器。
Let me know if it works!
让我知道它是否有效！
回答by bsiddiqui
Just to elaborate a bit here:
只是在这里详细说明一下：
Set a debugger wherever you want the breakpoints to be and then run your code with node debug script.js/index.js
在您希望断点所在的任何位置设置调试器，然后使用 node debug script.js/index.js 运行您的代码
When the debugger stops at you breakpoint, you will need to repl to inspect the variables.
当调试器在您的断点处停止时，您将需要 repl 来检查变量。
