Can vscode launch.json be launched

The launch.json configuration file for VS Code can be used to debug applications. It defines the startup and debugging process and contains a configuration array. Each configuration specifies the debugger type, request type, program path, command line parameters and other properties. Common pitfalls include path issues, environment variable settings, and specific configuration options for different debuggers. Proficient in using launch.json can improve debugging efficiency and avoid unnecessary trouble.

VS Code's launch.json: debugging tools and common pitfalls

Get your VS Code and a project you want to debug first. launch.json is a debugging configuration file for VS Code, which defines how VS Code starts and debugs your application. Without it, you can only print logs around in your code, which is inefficient and painful. With launch.json, debugging is as convenient as opening a cheat.

After completing the above steps, enter the debug panel of VS Code (usually accessible via the shortcut key Ctrl Shift D or click the debug icon in the sidebar). Click the button to create launch.json file, VS Code will automatically generate a basic configuration file based on the type of project you are currently opening. This usually includes some preset debugging configurations, such as configurations for different languages ​​such as Node.js, Python, or C.

It should be noted here that the automatically generated launch.json may not fully meet your needs. You need to modify it according to your project and debugging objectives. The most critical part of this is the configurations array, which defines multiple debug configurations. Each configuration contains a series of properties, such as:

• name : The name of the configuration is convenient for you to select from the drop-down menu.
• type : the type of the debugger, such as node , python , cppdbg , etc. It depends on the programming language and running environment your project uses.
• request : The request type, usually launch (start debugging) or attach (attached to the running process).
• program : The path to the program to be debugged. This is usually an executable file or entry point script for your application.
• args : Command line arguments passed to the program.
• cwd : The working directory of the program.
• env : environment variable.

For example, the launch.json configuration for a simple Node.js application may be as follows:

 <code class="json">{ "version": "0.2.0", "configurations": [ { "type": "node", "request": "launch", "name": "Launch Program", "program": "${workspaceFolder}/index.js", // 指向你的主程序文件"args": [], // 命令行参数"console": "integratedTerminal" // 调试输出到集成终端} ] }</code>

At this stage, you need to double-check program property to make sure it points to the correct file path. VS Code uses the ${workspaceFolder} variable to represent the path to the workspace folder, which is convenient for cross-platform use. If you are using a relative path, make sure that the path it is relative to your launch.json file is correct. I used to waste hours on a simple path error, so be sure to double check!

After completion, check whether the configuration is correct. Set a breakpoint, click the debug button to observe whether the program runs as expected and stops at the breakpoint. If you encounter problems, double-check each property in the launch.json file and refer to the official documentation of VS Code.

A common pit point is a path problem, especially when using relative paths. Another problem is the setting of environment variables, if your program depends on specific environment variables, you need to configure them correctly in launch.json . In addition, different debugger types have different configuration options that need to be adjusted according to the language and framework you are using. Sometimes, you may need to install additional debug extensions to support a specific language or framework.

In general, launch.json is a powerful debugging tool in VS Code, which can greatly improve your development efficiency. However, you need to understand its configuration options and pay attention to some common pitfalls in order to get the most out of it. Proficient in using launch.json will allow you to be at ease during the debugging process and avoid unnecessary trouble.

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