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angular - ng serve 命令提示 Angular 2 项目中的错误 549

问题描述

我已经尝试过所有给定的解决方案，比如更新angular/cli甚至卸载和重新安装node/npm。我可以创建新项目，它可以按预期工作，但是当我尝试在现有项目上运行 ng serve 命令时，它显示以下错误。请帮助解决这个问题。

module.js:549 抛出错误；^
错误：在 Module.require （module.js:596 :17) 在 Object 的 require (internal/module.js:11:18) 处。(E:\Project\Nitesh\AngularMergedCode\AngularDemo\node_modules\@angular-devkit\core\src\utils\index.js:19:10) 在 Module._compile (module.js:652:30) 在 Object.Module ._extensions..js (module.js:663:10) 在 Module.load (module.js:565:32) 在 tryModuleLoad (module.js:505:12) 在 Function.Module._load (module.js:497 :3) PS E:\Project\Nitesh\AngularMergedCode\AngularDemo> npm 更新 PS E:\Project\Nitesh\AngularMergedCode\AngularDemo> ng 服务

Package.json 文件：

{
  "name": "offica-replica",
  "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": {
    "@agm/core": "^1.0.0-beta.3",
    "@angular-devkit/build-angular": "^0.6.8",
    "@angular/animations": "^6.0.9",
    "@angular/common": "^6.0.9",
    "@angular/compiler": "^6.0.9",
    "@angular/core": "^6.0.9",
    "@angular/forms": "^6.0.9",
    "@angular/http": "^6.0.9",
    "@angular/platform-browser": "^6.0.9",
    "@angular/platform-browser-dynamic": "^6.0.9",
    "@angular/router": "^6.0.9",
    "core-js": "^2.5.4",
    "ngx-infinite-scroll": "^6.0.1",
    "ngx-pagination": "^3.1.1",
    "ngx-spinner": "^6.0.0",
    "ngx-toastr": "^8.9.1",
    "rxjs": "^6.2.2",
    "rxjs-compat": "^6.2.2",
    "template": "^0.17.5",
    "zone.js": "^0.8.26"
  },
  "devDependencies": {
    "@angular/cli": "^6.0.8",
    "@angular/compiler-cli": "^6.0.9",
    "@angular/language-service": "^6.0.9",
    "@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": "~5.3.0",
    "ts-node": "~5.0.1",
    "tslint": "~5.9.1",
    "typescript": "~2.7.2"
  }
}

标签： angularangular-cli

解决方案

我解决了这个问题，这是一个缺少模块的问题，所以我需要执行以下两个步骤：

1.从项目目录中删除 node_modules 文件夹。

  1. 运行命令 npm install （这将重新安装所有缺少的模块）

    在这个 ng serve 命令工作正常之后。

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