vue-cli项目运行后报错：

Error: Rule can only have one resource source (provided resource and test + include + exclude) in {
  "exclude": [
    null
  ],
  "use": [
    {
      "loader": "G:\\CustomerDay\\customerday\\node_modules\\cache-loader\\dist\\cjs.js",
      "options": {
        "cacheDirectory": "G:\\CustomerDay\\customerday\\node_modules\\.cache\\babel-loader",
        "cacheIdentifier": "f25d7318"
      },
      "ident": "clonedRuleSet-38[0].rules[0].use[0]"
    },
    {
      "loader": "G:\\CustomerDay\\customerday\\node_modules\\babel-loader\\lib\\index.js",
      "options": "undefined",
      "ident": "undefined"
    }
  ]
}
Error: Rule can only have one resource source (provided resource and test + include + exclude) in {
  "exclude": [
    null
  ],
  "use": [

原因：@vue/cli 依赖 webpack@4，它自带的 webpack 配置无法兼容 webpack@5 ，于是就报错，不能继续编译。如果在使用 @vue/cli，那么请不要贸然升级 webpack@5。

解决办法：

• 删除node_modules 和 package-lock.json
• 手动在 package.json 的 devDependencies 里添加 "webpack": "^4.47.0",（只要是4就好
• 重新安装全部依赖：npm install

一般情况可以解决，但如果出现以下这个错误：

根据提示可以强制安装：npm install --force 或 npm install --legacy-peer-deps