官网地址：https://angular.io/guide/npm-packages

一个Hello World级别的Angular应用的DevDependencies：

"devDependencies": {
    "@angular-devkit/build-angular": "~0.1000.5",
    "@angular/cli": "~10.0.5",
    "@angular/compiler-cli": "~10.0.6",
    "@types/node": "^12.11.1",
    "@types/jasmine": "~3.5.0",
    "@types/jasminewd2": "~2.0.3",
    "codelyzer": "^6.0.0",
    "jasmine-core": "~3.5.0",
    "jasmine-spec-reporter": "~5.0.0",
    "karma": "~5.0.0",
    "karma-chrome-launcher": "~3.1.0",
    "karma-coverage-istanbul-reporter": "~3.0.2",
    "karma-jasmine": "~3.3.0",
    "karma-jasmine-html-reporter": "^1.5.0",
    "protractor": "~7.0.0",
    "ts-node": "~8.3.0",
    "tslint": "~6.1.0",
    "typescript": "~3.9.5"
  }

使用下列的命令行添加DevDependencies：

npm install --save-dev

yarn add --dev

默认的Angular应用DevDependencies：

@angular‑devkit/

build‑angular: The Angular build tools.

@angular/cli: The Angular CLI tools.

@angular/

compiler‑cli: The Angular compiler, which is invoked by the Angular CLI’s ng build and ng serve commands.

@types/…：TypeScript definition files for 3rd party libraries such as Jasmine and Node.js.

jasmine/… : Packages to support the Jasmine test library.

karma/… : Packages to support the karma test runner.

protractor : An end-to-end (e2e) framework for Angular apps. Built on top of WebDriverJS.

ts-node: TypeScript execution environment and REPL for Node.js.

tslint: A static analysis tool that checks TypeScript code for readability, maintainability, and functionality errors.

typescript: The TypeScript language server, including the tsc TypeScript compiler.