Angular2 -导入组件时找不到模块

Question

我有一个问题，而我打算在我的应用程序中使用的一个模块是找不到的。我得到以下错误：

 GET http://product-admin.dev/node_modules/angular2-toaster/ 404 (Not Found)

该模块是使用NPM安装的，模块Github就在这里(https://github.com/Stabzs/Angular2-Toaster)。

npm install angular2-toaster

似乎应用程序无法在node_modules文件夹中找到该文件，我不知道原因。下面是我的Angular2 app.module.ts文件的相关部分：

import { FileUploaderDirective } from "./components/directives/files/FileUploaderDirective";
import { TabsDirective } from "./components/directives/tabs/TabsDirective";
import { PaginationDirective } from "./components/directives/pagination/PaginationDirective";

import { APIUrlPipe } from "./pipes/apiurl.pipe";
import { ToasterModule } from "angular2-toaster";


@NgModule({
    imports: [
        BrowserModule,
        HttpModule,
        FormsModule,
        routing,
        ToasterModule,
        ReactiveFormsModule

我还可以看到，在node_modules文件夹中，模块在一个名为‘angular2-烤面包机’的文件夹中。我想这可能是一个SystemJS配置问题，所以我在config对象的map属性中添加了一行，如下所示：

/**
 * System configuration for Angular 2 samples
 * Adjust as necessary for your application needs.
 */
(function (global) {
    System.config({
        paths: {
            // paths serve as alias
            'npm:': 'node_modules/'
        },
        // map tells the System loader where to look for things
        map: {
            // our app is within the app folder
            app: 'app',
            // angular bundles
            '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
            '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
            '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
            '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
            '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
            '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
            '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
            '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
            // other libraries
            'rxjs'                       : 'npm:rxjs',
            'angular2-toaster'           : 'npm:angular2-toaster',
            'angular2-in-memory-web-api' : 'npm:angular2-in-memory-web-api',
            "angular2-jwt"               : "npm:angular2-jwt/angular2-jwt.js"
        },

这似乎也没有什么区别。有人知道为什么会发生这个问题吗？

谢谢

Answer 1

我成功地完成了这个任务。我忘了在Systemjs.config.js文件中的“packages”属性中添加一个条目。这是修改后的档案，现在可以用了。我还使用了一个不同的烤面包包，叫做“NG2-烤面包”，如果有人对包名的不同感到困惑的话。

/**
 * System configuration for Angular 2 samples
 * Adjust as necessary for your application needs.
 */
(function (global) {
    System.config({
        paths: {
            // paths serve as alias
            'npm:': 'node_modules/'
        },
        // map tells the System loader where to look for things
        map: {
            // our app is within the app folder
            app: 'app',
            // angular bundles
            '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
            '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
            '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
            '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
            '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
            '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
            '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
            '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
            // other libraries
            'rxjs'                       : 'npm:rxjs',
            'ng2-toastr'                 : 'npm:ng2-toastr',
            'angular2-in-memory-web-api' : 'npm:angular2-in-memory-web-api',
            "angular2-jwt"               : "npm:angular2-jwt/angular2-jwt.js"
        },
        // packages tells the System loader how to load when no filename and/or no extension
        packages: {
            app: {
                main: './main.js',
                defaultExtension: 'js'
            },
            rxjs: {
                defaultExtension: 'js'
            },
            'angular2-in-memory-web-api': {
                main: './index.js',
                defaultExtension: 'js'
            },
            'angular2-jwt': {
                'defaultExtension': 'js'
            },
            'npm:ng2-toastr': {
                main: './ng2-toastr.js',
                defaultExtension: 'js'
            }
        }
    });
})(this);