connection, you can setup an ssh tunnel: This starts a ssh tunnel session where a connection to port 9221 on your local Your script starts in another Node.js process started with Each process is also assigned a unique UUID. (SIGUSR1 is not available on Windows.) Note: If you are just getting started with VS Code, you can learn about general debugging features and creating launch.json configuration files in the Debugging topic. To avoid confusion, VS Code always shows breakpoints at the location where Node.js thinks the breakpoint is. WebStorm recognizes --inspect, --inspect-brk, and now deprecated --debug flags so you can make any application accessible for debugging. If the debug session was started in "attach" mode (and the red terminate button in the Debug toolbar shows a superimposed "plug"), pressing Stop disconnects the Node.js debugger from the debuggee that then continues execution. Make sure the application to debug was launched with the following parameters: --debug=. Switch to WebStorm. In the embedded Terminal (Alt+F12) , type npm install --save-dev nodemon or yarn add nodemon --dev to install nodemon as a development dependency. This can be useful in situations where you have found a problem in your source code and you want to rerun a small portion of the code with modified input values. If you omit the minor and patch version and have, for example, "runtimeVersion": "14", then the most recent 14.x.y version installed on your system will be used. The current VS Code JavaScript debugger supports Node version at or above 8.x, recent Chrome versions, and recent Edge versions. To start debugging, hold Ctrl+Shift and click the link. Here is an example: By default, VS Code will stream the debugged source from the remote Node.js folder to the local VS Code and show it in a read-only editor. Instead of launching the Node.js program directly with node, you can use 'npm' scripts or other task runner tools directly from a launch configuration: Let's look at an 'npm' example. Start a Node.js debug configuration from the, From a .js file, choose "Debug As... > Node program", or, Create a Debug Configuration to attach debugger to running Node.js application (already started with, Listen on default address and port (127.0.0.1:9229). Create a Node.js run/debug configuration as described above. See section Restarting debug session automatically. In Node.js 8 and later, it will and use main process to run CLI debugger. You should find your Node.js process in that list and after selecting it, the Node.js debugger tries to attach to it. code on behalf of the Node.js process. Use the node.exe --preserve-symlinks switch in your launch configuration runtimeArgs attribute. you want to be able to debug. The hit count syntax supported by the Node.js debugger is either an integer or one of the operators <, <=, ==, >, >=, % followed by an integer. Click next to the Log files to be shown in console field which lists the available log files (if any). able to make this HTTP connection. Create a Node.js run/debug configuration as described above and go to the Logs tab. For example, this will discover sourcemaps for all .js files in the bin folder: With the smartStep attribute set to true in a launch configuration, VS Code will automatically skip 'uninteresting code' when stepping through code in the debugger. restart - restart session on termination. When started with the --inspect switch, a Node.js process listens for adebugging client. running locally on your machine will have unrestricted access. buttons at the top center of the IDE. If you want VS Code to open the editable source from your workspace instead, you can setup a mapping between the remote and local locations. In Node.js … Copy the port number from the information message Debugger listening : in the Terminal tool window or in the Run tool window that controls the running application. you need to allow remote debugging connections we recommend the use of ssh If you hover the cursor over it, you'll see the message, "Breakpoint ignored because generated code not found (source map problem?)". Setting up a project for Node.js debugging is usually straightforward with VS Code providing appropriate launch configuration defaults and snippets. Node.js is a trademark of Joyent, Inc. and is used with its permission. If you need to debug older Node.js programs, you can revert to the legacy debugger by setting debug.javascript.usePreview: false. The Debug tool window opens. This should make the breakpoints "jump back" to the requested location. If an external terminal is used, you can configure which terminal program to use via the terminal.external.windowsExec, terminal.external.osxExec, and terminal.external.linuxExec settings. When you set a breakpoint in app.ts, the debug adapter has to figure out the path to app.js, the transpiled version of your TypeScript file, which is what is actually running in Node. This option is only available in Node 10+. See Running and debugging scripts for details. If there is no match, then it can't bind the breakpoint, and it will turn gray. which should be able to debug as if the Node.js application was running locally. It can be more stable when debugging very large JavaScript objects. To enable saving the console output to a log file, select the Save console output to file checkbox and specify the file location. This makes it possible to attach to Electron's or VS Code's helper processes. However, you should also consider upgrading, as Node versions prior to 10 are end-of-life and no longer receive security updates as of April 2020. In case you didn't already read the Node.js section, take a look at: To see tutorials on the basics of Node.js debugging, check out these videos: To learn about VS Code's task running support, go to: To write your own debugger extension, visit: Yes, if you've created symlinks for folders inside your project, such as with npm link, you can debug the symlinked sources by telling the Node.js runtime to preserve symlinked paths. In addition to Node.js processes, the picker also shows other programs that were launched with one of the various forms of --debug or --inspect arguments. Proceed as during a debugging session with Chrome Debugging Protocol. It does this by matching the main script against a list of glob patterns. Create a new Node.js debug configuration and hit Debug. 'Uninteresting code' is code that is generated by a transpiling process but is not covered by a source map so it does not map back to the original source. A common issue when debugging with source maps is that you'll set a breakpoint, and it will turn gray. with the inspector listening only to localhost (the default). the useWSL debug configuration attribute has been deprecated and support for it will be dropped soon. The latest version can also be installed independently (e.g. Several commercial and open source tools can connect to the Node.js Inspector. You can debug applications that are started from WebStorm as well as attach to already running applications. Proceed with the debugging session —step through the breakpoints, switch between frames, change values on-the-fly, examine a suspended program, evaluate expressions, and set watches. An initial HTTP connection is necessary to obtain a Node.js will also start listening for debugging messages if it receives aSIGUSR1 signal. remoteRoot - Node's root directory. to allow local debuggers to be able to attach conveniently. Specify the Node.js interpreter to use. Select the newly created Node.js configuration from the Select run/debug configuration list on the toolbar and click next to it. skipFiles - automatically skip files covered by these glob patterns. Now run the application again with npm start, you should get console message that server is listening on 3000. browser security model. debugging client. WebStorm helps you run and debug your Node.js applications. Tip. restriction and will be able to run arbitrary code. Create a new Attach to a Node.js/Chrome configuration as described in Debugging a running Node.js application and select the Reconnect automatically checkbox.