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1. VISUAL STUDIO CODE JS EXPRESSION EXPECTED INSTALL
2. VISUAL STUDIO CODE JS EXPRESSION EXPECTED FULL
3. VISUAL STUDIO CODE JS EXPRESSION EXPECTED WINDOWS

To find the specific code in a transpiled file, use Ctrl+ F ( Edit > Find and Replace > Quick Find).įor client-side code, to hit a breakpoint in a TypeScript file. (Set the breakpoint in a line of code that allows breakpoints, such as a return statement or a var declaration.) Switch to Visual Studio and then set a breakpoint in your source code, which might be a JavaScript file, TypeScript file, or a JSX file. To attach the debugger from Visual Studio and hit breakpoints in the client-side code, it needs help with identifying the correct process. The app isn't yet running, so you get an empty browser page.Īttach the debugger to client-side script This starts your browser with debugging enabled.

VISUAL STUDIO CODE JS EXPRESSION EXPECTED WINDOWS

For details, see the Release Notes.Īlternatively, open the Run command from the Windows Start button (right-click and choose Run), and enter the following command: Use a different friendly name for the browser, like Edge with Debugging or Chrome with Debugging. > from the Debug toolbar, then choose Add, and then set the flag in the Arguments field. 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.

VISUAL STUDIO CODE JS EXPRESSION EXPECTED FULL

(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. Use Chrome Developer Tools or F12 Tools for Microsoft Edge for complex debugging scenarios.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.įor applications other than ASP.NET, follow the steps described here. For debugging TypeScript in ASP.NET Core, see Create an ASP.NET Core app with TypeScript.įor ASP.NET and ASP.NET Core, debugging embedded scripts in. For debugging client-side script in ASP.NET apps, see the blog post Debug JavaScript in Microsoft Edge and this post for Google Chrome. In some scenarios, the debugger automatically hits breakpoints in JavaScript and TypeScript codes and embedded scripts on HTML files. 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.

VISUAL STUDIO CODE JS EXPRESSION EXPECTED INSTALL

Depending on the type of app development you're doing, you may 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.