angular - 不再需要core-js了吗？

Question

我已经将Angular项目的版本从7更新到了8。一切运行顺利，原理图已完成(也许)，并且我们还可以(项目甚至还在生产中)。在更新Angular CLI时，我们总是生成一个新项目以查看实际差异并从中学习，例如新的依赖项，配置等。

当使用Angular CLI 8.0.4生成新的Angular项目时，新应用程序没有core-js作为依赖项:

"dependencies": {
    "@angular/animations": "~8.0.1",
    "@angular/common": "~8.0.1",
    "@angular/compiler": "~8.0.1",
    "@angular/core": "~8.0.1",
    "@angular/forms": "~8.0.1",
    "@angular/platform-browser": "~8.0.1",
    "@angular/platform-browser-dynamic": "~8.0.1",
    "@angular/router": "~8.0.1",
    "rxjs": "~6.4.0",
    "tslib": "^1.9.0",
    "zone.js": "~0.9.1"
  }

不存在分析已构建项目 core-js上的包的信息:

在我的较旧项目中，使用Angular CLI更新了该项目， core-js存在于最终 bundle 包中:

"dependencies": {
    "@angular/animations": "~8.0.3",
    "@angular/cdk": "~8.0.1",
    "@angular/common": "~8.0.3",
    "@angular/compiler": "~8.0.3",
    "@angular/core": "~8.0.3",
    "@angular/forms": "~8.0.3",
    "@angular/platform-browser": "~8.0.3",
    "@angular/platform-browser-dynamic": "~8.0.3",
    "@angular/router": "~8.0.3",
    "@auth0/angular-jwt": "2.1.1",
    "@hackages/ngxerrors": "~8.0.0",
    "@ng-bootstrap/ng-bootstrap": "5.0.0-rc.1",
    "@ngx-loading-bar/core": "~4.2.0",
    "@ngx-loading-bar/http-client": "~4.2.0",
    "@nicky-lenaers/ngx-scroll-to": "~2.0.0",
    "@swimlane/ngx-charts": "~12.0.1",
    "bootstrap": "~4.3.1",
    "core-js": "~2.6.9",
    "d3-scale": "~3.0.0",
    "d3-shape": "~1.3.5",
    "date-fns": "2.0.0-beta.2",
    "ngx-perfect-scrollbar": "~8.0.0",
    "ngx-toastr": "~10.0.4",
    "rxjs": "~6.5.2",
    "tslib": "~1.10.0",
    "xlsx": "~0.14.3",
    "zone.js": "~0.9.1"
  }

为什么会这样呢？删除 core-js作为依赖关系是否安全？更新原理图会丢失吗？在最新项目上安装 npm依赖项时，我从 core-js获得了安装后消息，但是在软件包描述中未明确显示该消息。

Answer 1

根据this的文章。

Note that core-js has been updated to v3, and is now directly handled by the CLI itself, so it’s no longer needed as a dependency of your application.