![]() ![]() Starting in Visual Studio 2019, you can set the -remote-debugging-port=9222 flag at browser launch by selecting Browse With. Start your browser with debugging enabled. ![]() Both the browsers use the same chromium code base. (Browser extensions may be running and intercept full debug mode, so you may need to open Task Manager to find and close unexpected instances of Chrome.)įor best results, shut down all instances of Chrome, even if you're working with Microsoft Edge (Chromium). Other browser instances can prevent the browser from opening with debugging enabled. Prepare the browser for debuggingįor this scenario, use either Microsoft Edge (Chromium) or Chrome.Ĭlose all windows for the target browser. For complex debugging scenarios, you may want to use Chrome Developer Tools or F12 Tools for Microsoft Edge instead.įor help with generating source maps, see Generate source maps for debugging. For example, in a Vue.js app, the minified script gets passed as a string to an eval statement, and there's no way to step through this code effectively using the Visual Studio debugger unless you use source maps. However, you may only be able to set and hit breakpoints in the minified or transpiled file, not in the source file. You can even attach the debugger to a running client-side script without the source maps. If your source is minified or created by a transpiler like a TypeScript or Babel, use source maps for the best debugging experience. JavaScript code must be in separate files to enable debugging. For debugging TypeScript in ASP.NET Core, see Create an ASP.NET Core app with TypeScript.įor Node.js applications and other JavaScript projects, follow the steps described here.įor ASP.NET and ASP.NET Core, debugging embedded scripts in. In some scenarios, the debugger automatically hits breakpoints in JavaScript and TypeScript codes and embedded scripts on HTML files.įor debugging client-side script in ASP.NET apps, choose Tools > Options > Debugging, and then select Enable JavaScript Debugging for ASP.NET (Chrome, Edge, and IE).įor more detailed information, see the blog post Debug JavaScript in Microsoft Edge and this post for Google Chrome. Visual Studio provides client-side debugging support only for Chrome and Microsoft Edge (Chromium). Using these tools, you can examine the DOM or interact with the app using the JavaScript Console. If you want to use the Chrome Developer Tools, press F12 in the Chrome browser. Now, you can inspect your app state by hovering over variables currently in scope, using debugger windows like the Locals and Watch windows. The debugger pauses at the breakpoint you set (IDE highlights the statement in the yellow background). To run your app, press F5 ( Debug > Start Debugging). A breakpoint indicates where Visual Studio should suspend your running code, so you can look at the values of variables or the behavior of memory, or whether or not a branch of code is getting run. With your project open in Visual Studio, open a server-side JavaScript file (such as server.js), click in the gutter to set a breakpoint:īreakpoints are the most basic and essential feature of reliable debugging. If you are developing Node.js applications, you need to install the Node.js development workload with Visual Studio. If you haven't already installed Visual Studio, go to the Visual Studio downloads page to install it for free.
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