我在尝试在 Angular 2 应用程序中添加提供程序时遇到问题。我正在尝试一些我在网上找到的解决方案，但我无法弄清楚我的应用程序发生了什么。
基本上，当我将提供程序添加到我的代码时，我遇到了问题：
- GET http://localhost:3000/dist/services/performances.service 404（未找到）
- 错误：（SystemJS）XHR 错误（404 Not Found）正在加载http://localhost:3000/dist/services/performances.service (...)
注意：我检查了路径是否正常，并且可视代码没有给我任何错误。
在下图中，您可以看到我的应用程序的输出。
应用程序输出
我要添加的服务：（performances.service.ts）
import {Injectable} from '@angular/core';
import {Performance} from '../common/performance';
import {PERFORMANCES} from '../data/data-performances';
@Injectable()
export class PerformancesService {
private performances : any;
contructor(){
this.performances = {};
}
getData(){
return this.performances = PERFORMANCES;
}
}
我的 app.component.ts
import {Component} from '@angular/core';
import {PerformancesService} from '../services/performances.service';
@Component({
selector : 'my-app',
template:
`
<header-fund-centre></header-fund-centre>
<div class="container">
<router-outlet></router-outlet>
</div>
`,
providers: [PerformancesService]
})
export class AppComponent { }
systemjs.config.js
(function (global) {
System.config({
paths: {
'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',
'angular-in-memory-web-api': 'npm:angular-in-memory-web-api',
// Styling
'@ng-bootstrap/ng-bootstrap': 'node_modules/@ng-bootstrap/ng-bootstrap/bundles/ng-bootstrap.js',
},
// packages tells the System loader how to load when no filename and/or no extension
packages: {
app: {
main: '../dist/main.js',
defaultExtension: 'js'
},
rxjs: {
defaultExtension: 'js'
},
'angular-in-memory-web-api': {
main: './index.js',
defaultExtension: 'js'
}
}
});
})(this);
知道添加基本提供程序时我做错了什么吗？谢谢！
已编辑
下面你可以看到我当前使用的所有依赖项
"dependencies": {
"@angular/common": "~2.1.1",
"@angular/compiler": "~2.1.1",
"@angular/core": "~2.1.1",
"@angular/forms": "~2.1.1",
"@angular/http": "~2.1.1",
"@angular/platform-browser": "~2.1.1",
"@angular/platform-browser-dynamic": "~2.1.1",
"@angular/router": "~3.1.1",
"@angular/upgrade": "~2.1.1",
"@ng-bootstrap/ng-bootstrap": "^1.0.0-alpha.14",
"angular-in-memory-web-api": "~0.1.13",
"bootstrap": "^3.3.7",
"core-js": "^2.4.1",
"reflect-metadata": "^0.1.8",
"rxjs": "5.0.0-beta.12",
"systemjs": "0.19.39",
"zone.js": "^0.6.25"
},
"devDependencies": {
"@types/core-js": "^0.9.34",
"@types/node": "^6.0.45",
"concurrently": "^3.0.0",
"lite-server": "^2.2.2",
"typescript": "^2.0.3"
}