Angular 创建项目导致各种控制台警告

Question

为早期类似帖子提供的解决方案对我不起作用。

我是 Angular 开发的新手，并试图从头开始学习。 我在尝试创建我的第一个应用程序时遇到了问题。

环境

1. 视窗 10

2. 使用 GitBash 安装 Angular 最新版本

3. 节点版本：v12.14.0

4. NPM 版本：6.13.4

5. Angular CLI 版本：8.3.21

问题

1. 给出安装新项目的命令。

ng 新测试

2. 一段时间后，它会生成以下错误。

   npm WARN deprecated core-js@2.6.11: core-js@<3 不再维护，由于问题数量不推荐使用。 请将您的依赖项升级到 core-js@3 的实际版本。

3. 我试图戒烟。 但是经过不同的帖子后我才知道，安装将毫无问题地进行。 我跟着它。 终于安装成功了。

4. 但最后在成功安装消息之前，它会在 core-js postinstall、npm WARN、0 漏洞、警告等方面生成大量消息。

这是最后的消息。

npm WARN karma-jasmine-html-reporter@1.5.1 requires a peer of jasmine-core@>=3.5 but none is installed. You must install peer dependencies yourself.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.11 (node_modules\webpack-dev-server\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.11: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.11 (node_modules\watchpack\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.11: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.11 (node_modules\karma\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.11: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.11 (node_modules\@angular\compiler-cli\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.11: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@2.1.2 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

added 1193 packages from 1051 contributors and audited 18835 packages in 279.874s

21 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities

warning: LF will be replaced by CRLF in .editorconfig.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in .gitignore.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in README.md.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in angular.json.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in browserslist.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in e2e/protractor.conf.js.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in e2e/src/app.e2e-spec.ts.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in e2e/src/app.po.ts.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in e2e/tsconfig.json.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in karma.conf.js.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in package-lock.json.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in package.json.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in src/app/app.component.html.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in src/app/app.component.spec.ts.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in src/app/app.component.ts.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in src/app/app.module.ts.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in src/environments/environment.prod.ts.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in src/environments/environment.ts.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in src/index.html.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in src/main.ts.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in src/polyfills.ts.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in src/styles.css.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in src/test.ts.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in tsconfig.app.json.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in tsconfig.json.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in tsconfig.spec.json.
The file will have its original line endings in your working directory
warning: LF will be replaced by CRLF in tslint.json.
The file will have its original line endings in your working directory
    Successfully initialized git.



 ng serve
i ?wds?: Project is running at http://localhost:4200/webpack-dev-server/
i ?wds?: webpack output is served from /
i ?wds?: 404s will fallback to //index.html

chunk {main} main.js, main.js.map (main) 47.8 kB [initial] [rendered]
chunk {polyfills} polyfills.js, polyfills.js.map (polyfills) 264 kB [initial] [rendered]
chunk {runtime} runtime.js, runtime.js.map (runtime) 6.15 kB [entry] [rendered]
chunk {styles} styles.js, styles.js.map (styles) 9.71 kB [initial] [rendered]
chunk {vendor} vendor.js, vendor.js.map (vendor) 3.81 MB [initial] [rendered]
Date: 2019-12-26T14:34:42.939Z - Hash: 697612d9c3732f0363f0 - Time: 11060ms
** Angular Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200/ **
i ?wdm?: Compiled successfully.
i ?wdm?: Compiling...

Date: 2019-12-26T14:51:49.861Z - Hash: 697612d9c3732f0363f0
5 unchanged chunks

Time: 14395ms
i ?wdm?: Compiled successfully.

我想知道为什么会给出这样的core-js和其他问题。 我的系统和环境有没有问题。 或者，NodeJS 上存在一些安装问题。 或者，这是一个简单而无视的问题，任何人都可能发生。

Answer 1

尝试在您的项目中运行npm update 。

Answer 2

我自己是新手 - 但做了一些挖掘。 发现了一个使用 angular CLI 人员记录的错误： https : //github.com/angular/angular-cli/issues/16576

修复已经完成，但我认为这似乎在主要版本 9 RC-7 中。 如果您致力于使用 8 直到 9 稳定，那么知道该怎么做就好了……