Dependency Injection
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/**
* PLUNKER VERSION
* (based on systemjs.config.js in angular.io)
* System configuration for Angular 2 samples
* Adjust as necessary for your application needs.
*/
(function (global) {
System.config({
// DEMO ONLY! REAL CODE SHOULD NOT TRANSPILE IN THE BROWSER
transpiler: 'ts',
typescriptOptions: {
tsconfig: true
},
meta: {
'typescript': {
"exports": "ts"
}
},
paths: {
// paths serve as alias
'npm:': 'https://unpkg.com/'
},
// 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-in-memory-web-api': 'npm:angular2-in-memory-web-api',
'ts': 'npm:[email protected] /lib/plugin.js',
'typescript': 'npm:[email protected] /lib/typescript.js',
},
// packages tells the System loader how to load when no filename and/or no extension
packages: {
app: {
main: './main.ts',
defaultExtension: 'ts'
},
rxjs: {
defaultExtension: 'js'
},
'angular2-in-memory-web-api': {
main: './index.js',
defaultExtension: 'js'
}
}
});
})(this);
{
"compilerOptions": {
"target": "es5",
"module": "commonjs",
"moduleResolution": "node",
"sourceMap": true,
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"removeComments": false,
"noImplicitAny": true,
"suppressImplicitAnyIndexErrors": true
}
}
/* Master Styles */
h1 {
color: #369;
font-family: Arial, Helvetica, sans-serif;
font-size: 250%;
}
h2, h3 {
color: #444;
font-family: Arial, Helvetica, sans-serif;
font-weight: lighter;
}
body {
margin: 2em;
}
body, input[text], button {
color: #888;
font-family: Cambria, Georgia;
}
a {
cursor: pointer;
cursor: hand;
}
button {
font-family: Arial;
background-color: #eee;
border: none;
padding: 5px 10px;
border-radius: 4px;
cursor: pointer;
cursor: hand;
}
button:hover {
background-color: #cfd8dc;
}
button:disabled {
background-color: #eee;
color: #aaa;
cursor: auto;
}
/* Navigation link styles */
nav a {
padding: 5px 10px;
text-decoration: none;
margin-top: 10px;
display: inline-block;
background-color: #eee;
border-radius: 4px;
}
nav a:visited, a:link {
color: #607D8B;
}
nav a:hover {
color: #039be5;
background-color: #CFD8DC;
}
nav a.active {
color: #039be5;
}
/* items class */
.items {
margin: 0 0 2em 0;
list-style-type: none;
padding: 0;
width: 24em;
}
.items li {
cursor: pointer;
position: relative;
left: 0;
background-color: #EEE;
margin: .5em;
padding: .3em 0;
height: 1.6em;
border-radius: 4px;
}
.items li:hover {
color: #607D8B;
background-color: #DDD;
left: .1em;
}
.items li.selected:hover {
background-color: #BBD8DC;
color: white;
}
.items .text {
position: relative;
top: -3px;
}
.items {
margin: 0 0 2em 0;
list-style-type: none;
padding: 0;
width: 24em;
}
.items li {
cursor: pointer;
position: relative;
left: 0;
background-color: #EEE;
margin: .5em;
padding: .3em 0;
height: 1.6em;
border-radius: 4px;
}
.items li:hover {
color: #607D8B;
background-color: #DDD;
left: .1em;
}
.items li.selected {
background-color: #CFD8DC;
color: white;
}
.items li.selected:hover {
background-color: #BBD8DC;
}
.items .text {
position: relative;
top: -3px;
}
.items .badge {
display: inline-block;
font-size: small;
color: white;
padding: 0.8em 0.7em 0 0.7em;
background-color: #607D8B;
line-height: 1em;
position: relative;
left: -1px;
top: -4px;
height: 1.8em;
margin-right: .8em;
border-radius: 4px 0 0 4px;
}
/* everywhere else */
* {
font-family: Arial, Helvetica, sans-serif;
}
/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/
import { Component } from '@angular/core';
import {Hero} from "./hero";
import {UserService} from "./user-service";
import {Logger} from "./logger-service";
import {EvenBetterLogger} from "./EvenBetterLogger";
@Component({
selector: 'my-app',
template: `
{{hero.name}} {{hero.age}}
`,
providers:
[ UserService , { provide: Logger, useClass: EvenBetterLogger }]
})
export class AppComponent {
heros: Hero[];
constructor(private userService: UserService) {
this.heros = userService.getUsers();
}
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
@NgModule({
imports: [
BrowserModule,
],
declarations: [
AppComponent,
],
bootstrap: [ AppComponent ]
})
export class AppModule { }
/**
* Created by dell on 2016/9/13.
*/
import {Injectable} from '@angular/core';
import {Logger} from "./logger-service";
@Injectable()
export class EvenBetterLogger extends Logger {
constructor() {
super();
}
public log(message: string) {
console.log("extend Logger content:" + message);
super.log(`Base class content: ${message}`);
}
}
export class Hero {
id: number;
name: string;
isSecret = false;
}
import { Injectable } from '@angular/core';
@Injectable()
export class Logger {
logs: string[] = [];
log(message: string) {
this.logs.push(message);
console.log(message);
}
}
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app.module';
platformBrowserDynamic().bootstrapModule(AppModule);
/**
* Created by dell on 2016/9/13.
*/
import { Hero } from './hero';
export var HEROES: Hero[] = [
{ id: 11, isSecret: false, name: 'Mr. Nice' },
{ id: 12, isSecret: false, name: 'Narco' },
{ id: 13, isSecret: false, name: 'Bombasto' },
{ id: 14, isSecret: false, name: 'Celeritas' },
{ id: 15, isSecret: false, name: 'Magneta' },
{ id: 16, isSecret: false, name: 'RubberMan' },
{ id: 17, isSecret: false, name: 'Dynama' },
{ id: 18, isSecret: true, name: 'Dr IQ' },
{ id: 19, isSecret: true, name: 'Magma' },
{ id: 20, isSecret: true, name: 'Tornado' }
];
/**
* Created by dell on 2016/9/13.
*/
/**
* Created by dell on 2016/9/8.
*/
import {Injectable} from '@angular/core';
import { HEROES } from './mock-heroes';
import {Logger} from "./logger-service";
@Injectable()
export class UserService {
constructor(private logger: Logger) {
}
getUsers() {
this.logger.log('get users');
return HEROES;
}
}