"justMyCode" is a feature that skips system or third-party library code during debugging, triggering breakpoints only in user-defined code. 1. It is enabled through launch.json configuration "justMyCode": true, suitable for languages ??such as Python, C#, JavaScript; 2. Suitable for debugging business logic, quickly locate problems, or when you are not familiar with dependency libraries; 3. It is not suitable for analyzing third-party libraries, debugging framework source code or project itself as a library; 4. Pay attention to different levels of support for different debuggers, and there may be problems such as incorrect library code or configuration failure, and you need to upgrade the plug-in to solve it.

The debugging experience of VSCode Just My Code debugging setting Just My Code debugging setting Just My Code debugging setting is very mature, but many people may not have noticed a small detail that improves debugging efficiency: the "Just My Code" setting . This function can help you skip the code of the system library and third-party library, and only stop it in the code you wrote yourself, reducing unnecessary single-step entry.

What is "Just My Code"

" Just My Code " is a debugger behavior control option, meaning "only debug my own code". When enabled, the debugger ignores non-user code (such as standard libraries, third-party modules), and will trigger breakpoints or single-step execution only when executing the functions you wrote.

It is not a unique feature of VSCode Just My Code debugging setting Just My Code debugging setting Just My Code debugging setting, but a behavior pattern supported by the underlying debuggers (such as Python debugpy or vsdbg).

How to enable Just My Code

Enabling Just My Code in VSCode Just My Code debugging setting Just My Code debugging setting Just My Code debugging setting is very simple, you only need to modify the configuration items in the launch.json file:

 {
    "type": "python",
    "request": "launch",
    "name": "Python: Debug the current file",
    "program": "${file}",
    "console": "integratedTerminal",
    "justMyCode": true
}

The key is the line "justMyCode": true . If you are using other languages, such as C# or JavaScript, you can also find out whether similar settings are supported in the corresponding configuration.

?? Note: Different languages ??and debuggers support this option differently, and some names may vary slightly, such as skipLibraries or ignoreExternalSources .

When is Just My Code suitable

• You are debugging the business logic you write and don't want to frequently enter libraries like pandas and requests .
• Want to quickly locate the problem instead of being interfered by various intermediate layers in the call stack.
• I just took over the project and am not familiar with the dependency library structure, so I just want to pay attention to the main process.

But there are some situations where this is not suitable:

• You want to analyze the internal behavior of a third-party library in depth.
• You are debugging the source code of the plug-in, extension, or framework itself.
• Your project itself is a packaged library, and you want to test its calling path.

Some easy pitfalls

• Some languages ??or debuggers turn off Just My Code by default . For example, Python debugpy defaults to true , but some environments may change.
• Just My Code is not perfect , and sometimes it will still go where you don't expect it, especially when you use decorators, asynchronous functions and other features.
• If you set "justMyCode": false but still can't jump, it may be a debugger version problem, and it is recommended to upgrade the relevant plug-ins and runtime.

Basically that's it. Just My Code is not complicated, but it can save a lot of time in daily debugging, especially for novices, it is important to avoid detours. You can flexibly switch on and off according to the specific situation of the project, without having to keep on or not at all.

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