This experimental syntax requires enabling one of the following parser plugin(s): 'decorators-legacy, decorators'

[PachVerb]

Version

4.5.4

Environment info

 System:
    OS: macOS Mojave 10.14.6
    CPU: (8) x64 Intel(R) Core(TM) i5-8279U CPU @ 2.40GHz
  Binaries:
    Node: 12.14.1 - /usr/local/bin/node
    Yarn: 1.21.1 - /usr/local/bin/yarn
    npm: 6.13.4 - /usr/local/bin/npm
  Browsers:
    Chrome: 85.0.4183.102
    Edge: Not Found
    Firefox: 80.0
    Safari: 13.1
  npmGlobalPackages:
    @vue/cli: 4.5.4

Steps to reproduce

vue cli 初始化项目，手动预选插件及其他设置

初始化完成，说明：整个项目是由ts 构建 外加eslint代码质量检查。

运行项目 npm dev， commland line 提示错误 无法解释ts装饰器。浏览器访问初始化的demo,切换路由，路由无法正确加加载渲染

What is expected?

能够使用装饰器语法，

What is actually happening?

缺少loader，编译ts装饰器语法。