Debugging plug-ins can significantly improve development efficiency. The effective usage methods include: 1. Install and enable plug-ins, search and install suitable debugging tools (such as Vue Devtools, React Developer Tools) through the browser extension store, and enable them in the developer tools after refreshing the page; some plug-ins need to be manually enabled. 2. Common debugging operations include setting breakpoints and viewing logs, clicking a breakpoint next to the line number in the Sources panel to pause the execution process, or inserting console.log() to observe key data. 3. Performance analysis and memory inspection can record CPU usage, rendering time and other indicators during loading through the Performance panel, and use the Memory panel to make object snapshots and comparisons to troubleshoot memory leaks. 4. When debugging remote devices and mobile devices, connect the phone with USB and enable developer mode. Select the device in the remote debugging panel of the desktop browser to monitor the console output and network requests in real time to help solve real machine compatibility issues.

Debugging plug-ins is an important tool for developers to troubleshoot problems and optimize code performance. After mastering the basic usage, you can significantly improve development efficiency. The following is a few common scenarios to talk about how to use debug plugins more effectively.

Install and enable plug-ins

Most modern browsers (such as Chrome and Firefox) support extension plugins, and many debugging tools also provide functionality based on these platforms. The installation method is usually simple:

• Open the browser's extension store
• Search for required debug plugins (such as Vue Devtools, React Developer Tools)
• Click "Add" or "Install"
• After refreshing the page, you can see the added tab page in the developer tool

Some plug-ins may be disabled by default, remember to enable the corresponding functions in the settings. In addition, there are also dedicated debuggers under different frameworks or language ecosystems, such as Python's pdb plug-in, Debugger for Chrome in VS Code, etc. The installation process is slightly different, but the general idea is consistent.

Common debugging operations: breakpoints and logs

When using debug plugins, the two most common methods are setting breakpoints and viewing log information.

Breakpoint debugging allows you to pause the execution process and view the current variable value, call stack and other information. For example in Chrome DevTools:

• Open Sources panel
• Find the target JS file
• Click next to the line number to set the break point
• The program will automatically pause after triggering the relevant logic.

This method is particularly suitable for tracking asynchronous requests and determining whether a function is called correctly.

Log output is more suitable for observational debugging. You can insert console.log() into the code or print out the key data with the log collection function provided by the plug-in. Some plug-ins can also structure the logs and even support filtering keywords to facilitate searching for specific information.

Performance analysis and memory checking

In addition to basic code debugging, some plug-ins also provide performance analysis functions, such as Chrome's Performance panel, which can record CPU usage, rendering time, and other metrics during page loading and interaction.

If you find that the page is stuttered or the response is slow, you can use this type of function:

• Record operation behaviors over a period of time
• View function call stack and time-consuming distribution
• Analyze the main thread blocking situation
• Check for frequent garbage collection

In addition, memory leaks are also common problems. With the Memory panel, you can do object snapshot comparisons to see if some data is not released correctly.

Debug remote devices and mobile devices

Nowadays, many websites need to be adapted to the mobile terminal, and debugging mobile pages has become a necessary skill. Mainstream browser plug-ins support remote debugging:

• Connect your phone with USB and enable developer mode
• Open the remote debugging panel in a desktop browser
• Select the connected device and page
• View console output, network request and other information in real time

This method is very useful for troubleshooting compatibility issues on real machines, especially when the simulator performance is inconsistent.

Basically these common operations are. Although the interfaces and functions of different plug-ins are different, the core logic is almost the same. The key is to select the right tool combination to locate the cause based on the current problem type.

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