在《Angular官方教程第七课HTTP》调试示例出现Cannot find module 'angular-in-memory-web-api'

分析问题

估计是缺少angular-in-memory-web-api依赖包，到工程根目录下的node_modules文件夹下去寻找angular-in-memory-web-api没有找到。

解决问题

1. 查看工程根目录下的package.json，没有添加angular-in-memory-web-api，于是在”dependencies”下添加"angular-in-memory-web-api": "^0.3.2"

   {"name": "angular-tour-of-heroes","version": "0.0.0","license": "MIT","scripts": {"ng": "ng","start": "ng serve","build": "ng build","test": "ng test","lint": "ng lint","e2e": "ng e2e"},"private": true,"dependencies": {"@angular/animations": "^4.0.0","@angular/common": "^4.0.0","@angular/compiler": "^4.0.0","@angular/core": "^4.0.0","@angular/forms": "^4.0.0","@angular/http": "^4.0.0","@angular/platform-browser": "^4.0.0","@angular/platform-browser-dynamic": "^4.0.0","@angular/router": "^4.0.0","core-js": "^2.4.1","rxjs": "^5.1.0","zone.js": "^0.8.4",},"devDependencies": {"@angular/cli": "1.1.1","@angular/compiler-cli": "^4.0.0","@angular/language-service": "^4.0.0","@types/jasmine": "2.5.45","@types/node": "~6.0.60","codelyzer": "~3.0.1","jasmine-core": "~2.6.2","jasmine-spec-reporter": "~4.1.0","karma": "~1.7.0","karma-chrome-launcher": "~2.1.1","karma-cli": "~1.0.1","karma-jasmine": "~1.1.0","karma-jasmine-html-reporter": "^0.2.2","karma-coverage-istanbul-reporter": "^1.2.1","protractor": "~5.1.2","ts-node": "~3.0.4","tslint": "~5.3.2","typescript": "~2.3.3"}
   }

2. 然后在项目根目录下执行cnpm install安装angular-in-memory-web-api依赖。

3. 然后重新执行npm start。