Angular2教程（英雄之旅）：找不到模块'Angular2-in-memory-web-api'

Question

/**
 * System configuration for Angular 2 samples
 * Adjust as necessary for your application needs.
 */
(function(global) {
  // map tells the System loader where to look for things
  var map = {
    'app':                        'app', // 'dist',
    '@angular':                   'node_modules/@angular',
    'angular2-in-memory-web-api': 'node_modules/angular2-in-memory-web-api',
    'rxjs':                       'node_modules/rxjs'
  };
  // packages tells the System loader how to load when no filename and/or no extension
  var packages = {
    'app':                        { main: 'main.js',  defaultExtension: 'js' },
    'rxjs':                       { defaultExtension: 'js' },
    'angular2-in-memory-web-api': { defaultExtension: 'js' },
  };
  var ngPackageNames = [
    'common',
    'compiler',
    'core',
    'http',
    'platform-browser',
    'platform-browser-dynamic',
    'router',
    'router-deprecated',
    'upgrade',
  ];
  // Add package entries for angular packages
  ngPackageNames.forEach(function(pkgName) {
    packages['@angular/'+pkgName] = { main: pkgName + '.umd.js', defaultExtension: 'js' };
  });
  var config = {
    map: map,
    packages: packages
  }
  System.config(config);
})(this);

// Imports for loading & configuring the in-memory web api
import { provide }    from '@angular/core';
import { XHRBackend } from '@angular/http';

import { InMemoryBackendService, SEED_DATA } from 'angular2-in-memory-web-api';
import { InMemoryDataService }               from './in-memory-data.service';

// The usual bootstrapping imports
import { bootstrap }      from '@angular/platform-browser-dynamic';
import { HTTP_PROVIDERS } from '@angular/http';

import { AppComponent }   from './app.component';

bootstrap(AppComponent, [
    HTTP_PROVIDERS,
    provide(XHRBackend, { useClass: InMemoryBackendService }), // in-mem server
    provide(SEED_DATA,  { useClass: InMemoryDataService })     // in-mem server data
]);

Answer 1

对于使用当前CLI工具创建的项目，通过安装

npm install angular-in-memory-web-api --save

然后执行导入为

import { InMemoryWebApiModule } from 'angular-in-memory-web-api/in-memory-web-api.module';

我的package.json

> "dependencies": {
>     "@angular/common": "^2.4.0",
>     "@angular/compiler": "^2.4.0",
>     "@angular/core": "^2.4.0",
>     "@angular/forms": "^2.4.0",
>     "@angular/http": "^2.4.0",
>     "@angular/platform-browser": "^2.4.0",
>     "@angular/platform-browser-dynamic": "^2.4.0",
>     "@angular/router": "^3.4.0",
>     "angular-in-memory-web-api": "^0.3.1",
>     "core-js": "^2.4.1",
>     "rxjs": "^5.1.0",
>     "zone.js": "^0.7.6"   },

>     "devDependencies": {
>     "@angular/cli": "1.0.0-rc.4",
>     "@angular/compiler-cli": "^2.4.0",
>     "@types/jasmine": "2.5.38",
>     "@types/node": "~6.0.60",
>     "codelyzer": "~2.0.0",
>     "jasmine-core": "~2.5.2",
>     "jasmine-spec-reporter": "~3.2.0",
>     "karma": "~1.4.1",
>     "karma-chrome-launcher": "~2.0.0",
>     "karma-cli": "~1.0.1",
>     "karma-jasmine": "~1.1.0",
>     "karma-jasmine-html-reporter": "^0.2.2",
>     "karma-coverage-istanbul-reporter": "^0.2.0",
>     "protractor": "~5.1.0",
>     "ts-node": "~2.0.0",
>     "tslint": "~4.5.0",
>     "typescript": "~2.0.0"   }