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options has an unknown property ‘before‘
2022-07-17 01:28:00 【Revin050】
文章目录
标题记录开发时遇到的一个小问题
开发时遇到如下报错
ValidationError: Invalid options object. Dev Server has been initialized using an options object that does not match the API schema.
- options has an unknown property ‘before’. These properties are valid:
object { allowedHosts?, bonjour?, client?, compress?, devMiddleware?, headers?, historyApiFallback?, host?, hot?, http2?, https?, ipc?, liveReload?, magicHtml?, onAfterSetupMiddleware?, onBeforeSetupMiddleware?, onListening?, open?, port?, proxy?, server?, setupExitSignals?, setupMiddlewares?, static?, watchFiles?, webSocketServer? }
根据错误提示可知，before已经被移除。
我之前创建项目时用的vue/cli是5.0.0版本。before的功能已经被修改成其他的API。找到node_modules/@vue/cli-service/lib/commands/serve.js文件。可以发现vue/[email protected]与vue/[email protected]的区别。
通过上图可以看到vue/[email protected]中的before已经融合到vue/[email protected]中，为了解决这个问题，也为了以后开发更加稳定，我采取了降cli版本的方法重新搭建项目。
$ npm uninstall -g @vue/cli //卸载当前版本
$ npm install -g @vue/[email protected]版本号 // 例如npm install -g @vue/[email protected]
最终问题解决。
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