ERROR Failed to compile with 4 errors 20:56:02 [eslint] D:\vuejsqimo\devtools-5.1.1\vue_shop\src\components\HelloWorld.vue 5:1 error The template root requires exactly one element vue/no-multiple-template-root ✖ 1 problem (1 error, 0 warnings) You may use special comments to disable some warnings. Use // eslint-disable-next-line to ignore the next line. Use /* eslint-disable */ to ignore all warnings in a file. error in ./src/components/HelloWorld.vue?vue&type=template&id=469af010& Module Error (from ./node_modules/@vue/vue-loader-v15/lib/loaders/templateLoader.js): (Emitted value instead of an instance of Error) Errors compiling template: Templates should only be responsible for mapping the state to the UI. Avoid placing tags with side-effects in your templates, such as <script>, as they will not be parsed.

这个错误是由于一个 Vue 单文件组件（HelloWorld.vue）中的模板根节点包含了多个元素，而 Vue 要求每个模板只能有一个根节点。你需要将模板中的多个根节点包裹在一个父元素中，或将其中一些根节点转换为子元素。另外，模板应该只负责将状态映射到 UI 上，不应该包含任何具有副作用的标签，比如 <script> 标签，因为它们不会被解析。