How to view the error log of uniapp development

With the continuous advancement and development of mobile application development technology, more and more developers are beginning to choose to use Uniapp to develop their own applications. Uniapp is a development tool based on the Vue.js framework. It has cross-platform characteristics and can output multiple versions of H5, mini programs, Apps, etc. at the same time. It has gradually become one of the main trends in mobile application development. However, as development continues, developers will inevitably encounter various problems, the most common of which is the inability to run due to errors in the application. In this case, it will be very important to know how to view the error logs of Uniapp Development.

This article will introduce how to view the error log of Uniapp development, so that developers can find and solve problems in time during the development process and quickly build high-quality mobile applications.

1. Turn on debugging mode

In the process of Uniapp application development, turning on debugging mode will be a key step to view error logs. This allows developers to monitor the running status of the application at any time, and when problems arise, they can promptly detect, locate and solve them quickly.

To enable the debugging mode of Uniapp, you can follow the steps below:

1. Enter the developer tools and find the entrance to the Uniapp application.
2. Click the debug button to turn on the debug mode.

2. Check the Uniapp error log

After turning on the debugging mode, if an error occurs in the application, developers can further check the error log generated by Uniapp and based on the content of the log Locate and resolve issues.

The error log generated by Uniapp is relatively detailed and generally includes the following aspects:

1. Error types: including syntax errors, runtime errors, resource loading errors, etc.
2. Error location: Specify the file where the error occurred and the specific number of rows and columns in the file.
3. Error message: Contextual information explaining the cause of the error and its origin.

Take runtime errors as an example. Suppose we call a non-existent function in the application. Uniapp will throw a runtime error. The following is the relevant log information:

[uni-app]TypeError: Cannot read property 'someFunction' of undefined
                at _callee$ (pages/index/index.vue.js:27:14)
                at tryCatch (runtime.js:45:40)
                at Generator.invoke [as _invoke] (runtime.js:274:22)
                at Generator.next (runtime.js:97:21)
                ...

In the above log, TypeError indicates that the type of error occurred is a type error, and someFunction is a function that does not exist; pages/index/index.vue.js:27:14 means that the location where the error occurred is pages/index/index. Line 27, column 14 in the vue.js file; tryCatch and Generator.next represent all execution stack information.

3. Combine with other tools

While viewing the Uniapp error log, developers can also combine other tools to further diagnose and solve the problem. These tools include:

1. DevTools

DevTools is Uniapp’s own developer tool that can be used to analyze application performance and code running status. Through DevTools, developers can check the runtime performance of the application, such as CPU, memory and network usage, etc., to better understand the running status of the application and help developers locate and solve problems.

2. Chrome Browser Developer Tools

Chrome Browser Developer Tools is also a very practical tool that can be used to analyze the running status of web pages. Through developer tools, developers can monitor application requests and view information such as resources loaded on the current web page and running status.

3. Sentry

Sentry is an open source error catching and processing software that can be used for cross-platform applications. When an error occurs in an application, Sentry can quickly capture error information and automatically generate an error report to help developers understand and solve problems.

Summary

Uniapp is a very convenient cross-platform application development tool that can quickly build multiple versions of applications. However, as development progresses, errors in the application become inevitable. Viewing Uniapp development error logs is very necessary for developers, which can help them discover and solve problems in time and quickly build high-quality mobile applications. At the same time, combining with other tools can also locate and solve problems more efficiently.

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