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Script debugger1/20/2024 ![]() ![]() Next, you can start learning how to debug with Visual Studio and how to write code with less bugs. In this article, you've learned a few general debugging concepts. some other tool, you will also learn how to use the debugger more effectively. Sometimes, the right "tool" might be a better coding practice. However, context is king, and it is important to leverage all the tools at your disposable to help you quickly eliminate bugs or errors. The debugger is an essential tool to find and fix bugs in your apps. A release build is optimized for performance, but a debug build is better for debugging. You build the debug version for debugging and the release version for the final release distribution. Visual Studio projects have separate release and debug configurations for your program. When you switch this setting, you change your project from a debug configuration to a release configuration. If you have a project open, choose the drop-down selector where it says Debug and choose Release instead. This enables a full set of debugging features that you can use to help find bugs in your app. When you start the app (press the green arrow or F5) in a debug configuration, you start the app in debug mode, which means you are running your app with a debugger attached. If you are new to Visual Studio, this can leave the impression that debugging your app has something to do with running your app-which it does-but these are fundamentally two very different tasks.Ī Debug value indicates a debug configuration. By default, the Debug value appears in the drop-down to the left. When you run your app in Visual Studio for the first time, you may start it by pressing the green arrow button in the toolbar (or F5). In the debugging documentation for Visual Studio, this is typically what we mean when we say "debugging". Or, you might debug by using a debugger.Ī debugger is a very specialized developer tool that attaches to your running app and allows you to inspect your code. ![]() You might debug code by using a performance profiler. For example, you might debug by scanning your code looking for typos, or by using a code analyzer. The term debugging can mean a lot of different things, but most literally, it means removing bugs from your code. This way, when we talk later about finding and fixing bugs, we'll be talking about the same thing. Before we show how to use it, we want to talk about some terms such as debugger, debugging, and debug mode. The Visual Studio debugger is a powerful tool. ![]() If your DevTools window is wide, this pane is displayed to the right of the Editor pane.Ī common method for debugging this type of problem is to insert several console.log() statements into the code and then to inspect values as the script runs.Applies to: Visual Studio Visual Studio for Mac Visual Studio Code This pane provides tools for inspecting the JavaScript for the webpage. After you select a file in the Navigator pane, this pane displays the contents of the file. The Editor pane (in the upper right corner). Every file that the webpage requests is listed here. The Navigator pane (in the upper left corner). Select the Page tab, and then select the JavaScript file, get-started.js. Or, press Ctrl+Shift+I (Windows, Linux) or Command+Option+I (macOS). To open DevTools, right-click the webpage, and then select Inspect. The Sources tool is where you debug JavaScript. These tasks include changing CSS, profiling page-load performance, and monitoring network requests. Step 2: Get familiar with the Sources tool UIĭevTools provides several tools for different tasks. Next, go to Step 2: Get familiar with the Sources tool UI to start fixing the addition error that's the bug. The label below the button says 5 + 1 = 51. For more information, see Browse InPrivate in Microsoft EdgeĬlick Add Number 1 and Number 2. Tip: Open Microsoft Edge in InPrivate Mode, to ensure that Microsoft Edge runs in a clean state. Alternatively you can press and hold Ctrl (for Windows, Linux) or Command (for macOS), and then click the link. To open the webpage, right-click the link and select "Open link in new tab" or "Open link in new Window" on the popup window. Open the demo webpage Get Started Debugging JavaScript in a new window or tab. The first step in debugging is to find a sequence of actions that consistently reproduce a bug. This article teaches you the basic workflow for debugging any JavaScript issue using DevTools. ![]()
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