Dynamic imports are only supported when the ‘--module‘ flag is set to ‘es2020‘

出现原因：使用ng框架升级至9，在core中引入路由的方式变化为：

执行项目时终端报错：

错误TS1323：仅当’–module’标志为’commonjs’或’esNext’时，才支持动态导入。
解决方式：您正在使用动态导入，因此必须像这样更改tsconfig.json才能将代码定位到esnext模块

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "module": "esnext", // add this line
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "importHelpers": true,
    "target": "es2015",
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2018",
      "dom"
    ]
  }
}

然后在检查一下tsconfig.app.json有没有类似的模块和目标配置
因为我已经设置为esnext但是还是运行报错！

  "extends": "./tsconfig.json",
  "compilerOptions": {
    "outDir": "./out-tsc/app",
    "types": []
  },
  "include": [
    "src/**/*.ts"
  ],
  "exclude": [
    "src/test.ts",
    "src/**/*.spec.ts"
  ]
}