![]() The following is a copy of the launch.json after clicking the Create launch.json button in the extension. For example, when you test your webpage by clicking a button in the webpage to cause your JavaScript code to run, the Visual Studio Code debugger listens to the browser and steps through the JavaScript code of the webpage. This file also controls which web browser to use in conjunction with the debugger. launch.json is a debugger configuration file. Visual Studio Code uses a launch.json file to configure and customize the debugger. If you open a particular, smaller folder, such as \Demos\demo-to-do\, the Generate launch.json button puts a launch.json file in that folder only. vscode folder at the root of the folder that you opened.įor a repo, such as the Demos repo, if you open the entire repo folder, the Generate launch.json button creates a \.vscode\launch.json file near the root, for the entire repo directory. In Visual Studio Code's Explorer pane, the launch.json file is placed in a. This approach is the built-in Visual Studio Code UI for starting the debugger, rather than the DevTools UI that's described in Opening DevTools and the DevTools browser. The two DevTools tabs open, and Visual Studio Code enters Debug mode. In the Run and Debug Side Bar, click Start Debugging. "url": "file://c:\\Users\\collabera\\Documents\\GitHub\\Demos\\demo-to-do\\index.html", ![]() "name": "Launch Microsoft Edge in headless mode", It's the name of an individual configuration, not of a compound configuration: "configurations": [ This is a string not about the Edge DevTools tab, but about the Edge DevTools: Browser tab. In the Debug Console in the lower right, the string is Launch Microsoft Edge in headless mode. "name": "Launch Edge and attach DevTools", "Launch Microsoft Edge in headless mode", "name": "Launch Edge Headless and attach DevTools", json file, telling the Visual Studio Code debugger to open the two DevTools tabs, or else the DevTools tab and an external browser: "compounds": [ These are names of compound configurations in the. In the bottom of the Visual Studio Code window, the string is Launch Edge Headless and attach DevTools. In the Run and Debug Side Bar in the upper left, the strings are Launch Edge Headless and attach DevTools and Launch Edge and attach DevTools. Select Activity Bar > Run and Debug > click the Run and Debug button. In Activity Bar > Explorer, double-click index.html to open it. Select Activity Bar > Microsoft Edge Tools > click the Generate launch.json button. Suppose no launch.json file exists in the. Select File > Open Recent > C:\Users\username\Documents\GitHub\Demos\demo-to-do\index.html, cloned per Step 5: Clone the Demos repo in Installing the DevTools extension for Visual Studio Code. The "name" string of each debug configuration populates dropdown lists in several places. You normally don't need to change anything in the file except to replace several instances of the URL string, as explained in Opening DevTools by clicking the Launch Project button in Opening DevTools and the DevTools browser. vscode directory.ĭetails about the launch.json file format are below. If you want to use Visual Studio Code's UI such as F5 to start the DevTools tabs along with Debug mode, your opened folder (workspace) must contain a DevTools-generated (DevTools-compatible) launch.json file in the. Read this article if you want to use custom, advanced debug configurations. In most cases, the only thing you need to know about the content of the DevTools-generated launch.json file (if you choose to use it) is that you need to enter your desired URL in the "url" string in several places. To use the DevTools extension, a launch.json file is only needed if you want to use the debugger and your webpage requires running on a web server, not just a local file system. Visual Studio Code uses a launch.json file to define debug configurations.
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