What to do if vue deployment and compilation errors are reported

Vue.js is a popular JavaScript framework for building modern web applications. It has a composable architecture, a powerful toolset, and an active open source community. However, when using Vue.js, developers may encounter various problems. One of the common problems is compilation errors during deployment.

Deploying Vue.js applications may encounter various problems, such as missing libraries, version incompatibility, etc. When compilation errors occur here, you can troubleshoot common issues and take appropriate steps to resolve them. The following are some common Vue.js compilation errors and their solutions:

1. Error message: Unexpected token < in JSON at position 0
   This is because the application’s index.html file does not The JavaScript file of Vue.js is loaded correctly, causing the browser to be unable to parse JSON. To solve this problem, you can correctly reference the Vue.js file in the index.html file or add vue dependencies in the package.json file.
2. Error message: npm run build failed
   You will encounter the following error when running the npm run build command:
   Failed to load plugin @babel/proposal-class-properties, No plugin found. Make sure that you have installed a plugin that supports the specific version number specify version.

This is because the babel/proposal-class-properties plugin version does not support the specific version you are using. The solution is:

• Install the following dependencies that support the specific version you are using:
  npm install @babel/plugin-proposal-class-properties@version --save-dev

• Configure in webpack.config.js or babel.config.js file
  module.exports = {

  presets: [
    '@babel/preset-env',
    ['@babel/preset-react', {
      runtime: 'automatic'
    }]
  ],
  plugins: [
    ['@babel/plugin-proposal-class-properties', { loose: true }]
  ]

  }

3. Error reporting Message: Module build failed: Error: Cannot find module 'node-sass'
   This is an error caused by the lack of node-sass library. The solution is:

• In package. Add node-sass dependency to the json file:
  npm install node-sass --save-dev or yarn node-sass

• Change the sass option in the vue.config.js file:
  module.exports = {

  css: {
    loaderOptions: {
      sass: {
        implementation: require('sass'),
        sassOptions: {
          fiber: require('fibers'),
          indentedSyntax: true // 这里是因为我的sass文件是indentedSyntax，你可以使用css文件，不需要这一行
        },
      },
    },
  },

  };

4. Error message: Failed to load resource: the server responded with a status of 404 (Not Found)
   This is caused by the incorrect path to load the Vue.js application file, and the server cannot find the file. To resolve this issue, you can check that the path to the loaded file is correct and exists.

When troubleshooting compilation errors, the best way is to read the error message carefully and follow the recommendations to take the appropriate steps to solve the problem. At the same time, you can also browse the official documentation or search the community forum for more support and help. At the end of the day, Vue.js is an exciting framework that is worth our time and effort to learn and master.

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