Details on how to view error documentation in Uni-app

With the popularity of mobile applications, more and more developers tend to use cross-platform application frameworks to build applications. Uni-app is a cross-platform framework built on Vue.js that allows developers to build iOS, Android, and web applications simultaneously using one set of code. However, it is inevitable to encounter various errors or abnormal situations during the development process. At this time, how to view error documents has become a key issue faced by developers. This article will introduce in detail how to view error documents in the Uni-app framework to help developers solve problems faster.

1. Error log

When developing Uni-app applications, if an error occurs, you can view the error message in the following ways:

1. Open the console

Open the Uni-app application page in the browser, press the F12 key to open the developer tools.

2. Select the console

In the developer tools, switch to the "Console" tab.

3. View error information

In the console, you can see all error information and log information of the Uni-app application. Developers can use the error message to solve the problem.

2. Use debugger mode

Uni-app also provides a debug mode that can help developers locate problems faster. The specific method is as follows:

1. In the manifest.json configuration file of uni-app, add the following code:

"debug": {
    "enable": true
}

2. Use the debugger statement in the application to set breakpoints, for example :

function test(){
    var a = 1;
    var b = 2;
    debugger;
    var c = a + b;
    console.log(c);
}

3. Start the uni-app application, open the browser console, and switch to the "Sources" tab.

4. In the "Sources" tab, find the application script and click the "{}" button to open the source code file.

5. Find the place where the debugger statement is used in the source code file, and click the box to the left of the line number to put a breakpoint on that line.

6. Refresh the browser page and the application will stop running at the set breakpoint. View the variable values ​​and call stack in the console to find the problem.

3. Use the Vconsole plug-in

Vconsole is a lightweight mobile JavaScript debugging tool that can view error information and debugging information of Uni-app applications on mobile devices. Using Vconsole, you only need to add a line of code to your application to enable debugging mode, as shown below:

1. Install the vconsole plug-in in the Uni-app application

npm install vconsole --save-dev

2. In the app Introduce vconsole into the .vue file and execute the enable method to enable vconsole

import VConsole from 'vconsole';
new VConsole().enable();

3. Use the mobile browser to open the application, you can see the floating vconsole debugging tool, click to view the corresponding information.

Summary

There are three ways to view error documents in the Uni-app framework: view error logs, use debugger mode, and use the Vconsole plug-in. Developers can choose the appropriate method to locate and debug problems based on specific situations. Hope this article can be helpful to Uni-app developers.

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