WebdriverIO中Selenium standalone服务初始化失败问题求助

问题场景 #

执行npm run wdio.conf.ts时触发如下错误：

Failed to initilialise launcher service unknown: Error: Couldn't find plugin "selenium-standalone" service, neither as wdio scoped package "@wdio/selenium-standalone-service" nor as community package "wdio-selenium-standalone-service". Please make sure you have it installed!

当前配置信息：

• wdio.conf.ts中的services配置：

  services: [['selenium-standalone', { drivers: { firefox:  true, chrome: true, chromiumedge: true } }]],
  

• package.json已声明依赖：

  "@wdio/cli": "^8.15.6",
  "@wdio/selenium-standalone-service": "^8.15.0"
  

排查与解决步骤 #

• 重新安装依赖：删除node_modules文件夹和package-lock.json（或yarn.lock）文件，执行npm install确保依赖完整安装
• 确认配置文件导出格式：检查wdio.conf.ts是否正确导出配置对象，示例格式如下：

  export const config = {
    // 其他配置项
    services: [['selenium-standalone', { drivers: { firefox: true, chrome: true, chromiumedge: true } }]],
    // 其他配置项
  }
  

• 验证版本兼容性：确保使用的Node.js版本符合WDIO 8.x的要求（推荐16.x或18.x），避免版本不匹配导致的模块加载异常
• 清理WDIO缓存：执行npx wdio clean清除缓存后，重新运行启动命令

内容的提问来源于stack exchange，提问作者Vijendhar