Would be great of you have any suggestions.so I can debug my Node.js apps in Google Chrome. Tried all as per node-inspector fails to connect to node but no luckĬouldn't work out what I'm missing. Noticed that I'm not getting 'Express server listening on port 3000'
Node script debugger windows#
It opens up node-inspector but without any code.all windows are empty. This is what I'm doing to start the debugger.
Node script debugger code#
The Visual Studio Code debugger will try to auto-detect the debug environment. When fixing a bug or implementing features, a better flow is to clone the library, and then point to your local copy by using the npm link or yarn link commands.I'm trying to debug my nodejs app using node-inspector. The easiest way to start a debugging session in Visual Studio Code is to open a file in the editor, click the Run View icon in the Activity Bar (or press Ctrl+Shift+D on your keyboard), followed by the Run and Debug button at the top left corner of the application. This is often dist/index.js but that depends on the library and target environment.įor example, in Vite.js the entrypoint is dist/node/index.js. In TypeScript packages (and some JS packages), make sure to edit the transpiled file instead of the sources. You can add console.log as needed, or even modify the behavior of the library, which can be useful to track down bugs. (I use it all the time though, so convenient 😅) Skip to the next section for a better approach. Whereas devtool is more focused on the command-line, Unix-style piping/redirection, and Electron/Browser APIs for interesting use-cases. iron-node includes a built-in command to recompile native addons and a complex graphical interface that shows your package.json and README.md. Editing In-Place ✍️īecause JavaScript is a dynamic language, you can tweak the code in-place, restart the process, and your changes will be picked up.ĭisclaimer: This has many caveats: bugs that only happen in your local, or the opposite, code that only seems to work in your local. iron-node A similar Electron-based debugger is iron-node.
Unlike the previous sections, this is something you can leverage for client-side packages as well. I like using Sublime Text or Visual Studio Code to navigate the file tree.įor example, running npm edit vite will open the copy of the vite package that is installed in the node_modules for the current directory. The EDITOR environment variable will be used to infer the preferred text editor. Npm edit to open a package in your favorite text editor. In order to learn more and understand which files you should be debugging, you can run
Prerequisites You will need Node.js installed in your development environment. You will then use Google Chrome DevTools as a Graphical User Interface (GUI) alternative to the command line Node.js debugger. Dealing with errors involves two very different processes error handling and. You will first debug code using the built-in Node.js debugger tool, setting up watchers and breakpoints so you can find the root cause of a bug. It's useful to ignore Node.js internals to avoid stepping into the framework. Video created by NIIT for the course Server side JavaScript with Node.js.
Visual Studio Code is another great option.
I like to use the Node Inspector Manager extension, which will automatically attach the browser's DevTools to the node process.ĭevTools provide a great debugging environment, with visual breakpoints, watchers, file navigation, and more. You must provide a JS executable as an argument, for example:Īdd an inspect shortcut in your scripts if you need to debug often. Using node -inspect-brk will break execution until a debugger client is attached. Fortunately, there are many ways to start a debugging session. Sometimes debug output is not enough to figure out what's the problem.
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