Angular ng 服务不在本地主机上托管站点

当我跑步时ng serve在我的 CLI 上，我得到以下输出：

Angular Live Development Server 正在监听 localhost:4200，打开浏览器 http://localhost:4200/

但是当我在浏览器中打开 http://localhost:4200/ 时，什么也没有。

关于如何解决这个问题有什么建议吗？

这是我的package.json

{
  "name": "eastlaw",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^6.1.0",
    "@angular/common": "^6.1.0",
    "@angular/compiler": "^6.1.0",
    "@angular/core": "^6.1.0",
    "@angular/forms": "^6.1.0",
    "@angular/http": "^6.1.0",
    "@angular/platform-browser": "^6.1.0",
    "@angular/platform-browser-dynamic": "^6.1.0",
    "@angular/router": "^6.1.0",
    "core-js": "^2.5.4",
    "rxjs": "6.0.0",
    "zone.js": "~0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.7.0",
    "@angular/cli": "~6.1.5",
    "@angular/compiler-cli": "^6.1.0",
    "@angular/language-service": "^6.1.0",
    "@types/jasmine": "~2.8.6",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "~8.9.4",
    "codelyzer": "~4.2.1",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~1.7.1",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.0",
    "karma-jasmine": "~1.1.1",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.4.0",
    "ts-node": "~5.0.1",
    "tslint": "~5.9.1",
    "typescript": "~2.7.2"
  }
}

要调试该问题，请尝试以下操作：

• ng 服务-o
• 使用密钥检查配置文件中提到的默认端口baseURL
• 检查 ng build 命令（如果正在生成 webpack）
• ng服务--端口8080--主机0.0.0.0--disableHostCheck true

如果可能的话尝试上传浏览器控制台图像