小编use*_*859的帖子

上周我在创建一个新项目并为其提供服务时没有任何问题，但是今天当我使用 vue/cli 创建一个新的默认项目时，我在服务时出现编译错误。

PS E:\Projects\testing> yarn serve
yarn run v1.22.5
$ vue-cli-service serve
 INFO  Starting development server...
98% after emitting CopyPlugin

 ERROR  Failed to compile with 1 error                                                                                                                                                                        ??12:22:33
 error  in ./node_modules/@vue/reactivity/dist/reactivity.esm-bundler.js

Module parse failed: Unexpected token (763:13)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
| }
| class RefImpl {
>     _rawValue;
|     _shallow;
|     _value;

 @ ./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js 1:0-233 2:0-216 2:0-216 2:0-216 2:0-216 2:0-216 …