Analyze and solve the error problem when uniapp is compiled into a small program

Recently, more and more developers have begun to use uniapp to develop small program applications. However, in the process of compiling small programs, many people have encountered various errors and have to give up using uniapp or switch to another. Other development frameworks. This article will analyze the errors that may occur when uniapp is compiled into a small program and provide corresponding solutions.

1. build npm fail

When compiling the uniapp applet, sometimes a build npm fail error message will appear. This is usually because the installed dependencies are incomplete or the version is incorrect. due to matching. The solution is as follows:

1.1 Enter npm i on the command line to reinstall all dependencies

1.2 Check whether the dependencies and devDependencies in the package.json file are missing or have mismatched versions

1.3 Clear the node_modules folder in the root directory of the uniapp project, and then reinstall all dependencies

2. babel-loader

babel-loader is a uniapp compilation applet One of the most common errors is Module build failed: Error: Cannot find module '@babel/core'. This error is usually caused by the incompatibility of the Babel version. The solution is as follows:

2.1 Delete the node_modules folder in the project root directory and re-execute the npm i command

2.2 Check the package.json file Are there any version conflicts between dependencies and devDependencies? The solution is to unify the version numbers of all dependencies

2.3 Change "@babel/core": "^7.3.0" to "@babel/core" : "^7.2.2" or "@babel/core": "^7.0.0"

3. wxs

When developing small programs in uniapp, if you use wxs tag, sometimes there will be a problem that wxs cannot be executed normally. This is usually because the wxs file is not compiled successfully. The solution is as follows:

3.1 Comment out the code that uses the wxs tag, recompile, and check whether the compilation is successful

3.2 Check whether the compiled code exists in the dist/wxs folder in the project root directory wxs file and check whether the content of the file is correct

3.3 If the content of the compiled wxs file is incorrect, you can copy the wxs file to the WeChat developer tools to manually compile

4. static resources Path problem

In uniapp, you can use relative paths to reference image resources in the project. However, when compiling into a small program, sometimes the image loading fails. The solution is as follows:

4.1 Make sure the image file exists, and the file name and file suffix are correct

4.2 Check whether the relative path is correct , to avoid path problems caused by "/" and "\" in the path

4.3 Try to copy the image resources directly to the WeChat developer tools to see if they can be loaded normally to determine whether it is caused by a path error. Problem

To sum up, common errors reported when uniapp is compiled into a small program mainly include build npm fail, babel-loader, wxs and static resource path problems. To solve these errors, you first need to check whether the dependencies are completely installed and whether the versions match. Secondly, you can try to clear the node_modules folder or directly copy the compiled files to WeChat developer tools for debugging. Hope this article is helpful to you.

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