<!DOCTYPE html>
<html>
<head>
<base href="." />
<title>angular2 playground</title>
<link rel="stylesheet" href="style.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/zone.js/dist/zone.js"></script>
<script src="https://unpkg.com/zone.js/dist/long-stack-trace-zone.js"></script>
<script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
<script src="https://unpkg.com/systemjs@0.19.31/dist/system.js"></script>
<script src="config.js"></script>
<script>
System.import('app')
.catch(console.error.bind(console));
</script>
</head>
<body>
<my-app>
loading...
</my-app>
</body>
</html>
/* Styles go here */
### Angular Starter Plunker - Typescript
System.config({
//use typescript for compilation
transpiler: 'typescript',
//typescript compiler options
typescriptOptions: {
emitDecoratorMetadata: true
},
paths: {
'npm:': 'https://unpkg.com/'
},
//map tells the System loader where to look for things
map: {
'app': './src',
'@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',
'@angular/core/testing': 'npm:@angular/core/bundles/core-testing.umd.js',
'@angular/common/testing': 'npm:@angular/common/bundles/common-testing.umd.js',
'@angular/compiler/testing': 'npm:@angular/compiler/bundles/compiler-testing.umd.js',
'@angular/platform-browser/testing': 'npm:@angular/platform-browser/bundles/platform-browser-testing.umd.js',
'@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic-testing.umd.js',
'@angular/http/testing': 'npm:@angular/http/bundles/http-testing.umd.js',
'@angular/router/testing': 'npm:@angular/router/bundles/router-testing.umd.js',
'rxjs': 'npm:rxjs',
'typescript': 'npm:typescript@2.0.2/lib/typescript.js'
},
//packages defines our app package
packages: {
app: {
main: './main.ts',
defaultExtension: 'ts'
},
rxjs: {
defaultExtension: 'js'
}
}
});
//main entry point
import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {AppModule} from './app';
platformBrowserDynamic().bootstrapModule(AppModule)
//our root app component
import {Component, NgModule} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'
import {Observable} from 'rxjs/Rx';
@Component({
selector: 'my-app',
template: `
<div>
<h1>Cascading Async Operations</h1>
<hr />
<div>
<table>
<tr>
<td style='white-space: nowrap;'>Random Number from first Observable:</td><td>{{observableRandResult}}</td>
</tr>
<tr>
<td style='text-align: right;'>x 2:</td><td>{{observableCalcResult1}}</td>
</tr>
<tr>
<td style='text-align: right;'>x 3:</td><td>{{observableCalcResult2}}</td>
</tr>
</table>
Top-Level Observable Status: <span [style.color]="mainObservableStatus === 'Idle' ? 'Blue' : 'Red'">{{mainObservableStatus}}</span>
<br />
<input type="button" [disabled]="calculating" value="Trigger" (click)="doCascadingAsyncOperations(false)" />
<input type="button" [disabled]="calculating" value="Trigger and Wait" (click)="doCascadingAsyncOperations(true)" />
</div>
</div>
`,
})
export class App {
observableRandResult: number;
observableCalcResult1: number;
observableCalcResult2: number;
mainObservableStatus: string = "Idle";
calculating: boolean = false;
constructor() {}
doCascadingAsyncOperations(waitForAll: boolean): void {
this.calculating = true;
this.observableRandResult = null;
this.observableCalcResult1 = null;
this.observableCalcResult2 = null;
this.mainObservableStatus = "Running";
if (waitForAll) {
this._cascadingAsyncOperationsWorker2().subscribe((result) => {
this.mainObservableStatus = "Idle";
});
}
else {
this._cascadingAsyncOperationsWorker1().subscribe((result) => {
this.mainObservableStatus = "Idle";
});
}
}
_cascadingAsyncOperationsWorker1(): Observable {
return new Observable(mainObserver => {
setTimeout(() => {
mainObserver.next((Math.random() * 100).toFixed(0));
mainObserver.complete();
}, 1000);
})
.do(mainObservableResult => {
this.observableRandResult = mainObservableResult;
(new Observable(innerObserver1 => {
setTimeout(() => {
innerObserver1.next(mainObservableResult * 2);
innerObserver1.complete();
}, 1000);
})
.do(innerObservable1Result => {
this.observableCalcResult1 = innerObservable1Result;
(new Observable(innerObserver2 => {
setTimeout(() => {
innerObserver2.next(innerObservable1Result * 3);
innerObserver2.complete();
}, 1000);
})
.do(innerObservable2Result => {
this.observableCalcResult2 = innerObservable2Result;
this.calculating = false;
})).subscribe();
})).subscribe();
});
}
_cascadingAsyncOperationsWorker2(): Observable {
return new Observable(wrapperObserver => {
(new Observable(mainObserver => {
setTimeout(() => {
mainObserver.next((Math.random() * 100).toFixed(0));
mainObserver.complete();
}, 1000);
})
.do(mainObservableResult => {
this.observableRandResult = mainObservableResult;
(new Observable(innerObserver1 => {
setTimeout(() => {
innerObserver1.next(mainObservableResult * 2);
innerObserver1.complete();
}, 1000);
})
.do(innerObservable1Result => {
this.observableCalcResult1 = innerObservable1Result;
(new Observable(innerObserver2 => {
setTimeout(() => {
innerObserver2.next(innerObservable1Result * 3);
innerObserver2.complete();
}, 1000);
})
.do(innerObservable2Result => {
this.observableCalcResult2 = innerObservable2Result;
this.calculating = false;
wrapperObserver.next();
wrapperObserver.complete();
})).subscribe();
})).subscribe();
})).subscribe();
});
}
}
@NgModule({
imports: [ BrowserModule ],
declarations: [ App ],
bootstrap: [ App ]
})
export class AppModule {}