<!DOCTYPE html>
<html>
<head>
<base href="." />
<title>angular 5 + flex layout</title>
<!-- polyfill(s) for older browsers -->
<script src="https://unpkg.com/core-js/client/shim.min.js"></script>
<script src="https://unpkg.com/zone.js@0.8.16?main=browser"></script>
<!--<script src="https://unpkg.com/reflect-metadata@0.1.10"></script>-->
<script src="https://unpkg.com/systemjs@0.20.18/dist/system.src.js"></script>
<script src="https://unpkg.com/web-animations-js@2.3.1"></script>
<script src="systemjs.config.js"></script>
<script>
System.import('app').catch(function (err) { console.error(err); });
</script>
</head>
<body>
<my-app>
loading...
</my-app>
</body>
</html>
//our root app component
import { Component } from '@angular/core';
import { TrackingService } from './tracking.service';
@Component({
selector: 'my-app',
template: `
Type in the input and then pause to see the debounced value <br>
<input [(ngModel)]="inputValue">
<div>{{inputValue | debounce:200 | track}}</div>
<h3>Used Words</h3>
<div *ngFor="let word of getWords()">{{word}}</div>
`,
})
export class AppComponent {
public inputValue: string = '';
constructor(private trackingService: TrackingService) {
}
public getWords(): string[] {
return this.trackingService.getWords();
}
}
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { BrowserModule } from '@angular/platform-browser';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { AppComponent } from './app.component';
import { DebouncePipe } from './debounce.pipe';
import { TrackingPipe } from './tracking.pipe';
import { TrackingService } from './tracking.service';
@NgModule({
imports: [
BrowserModule,
BrowserAnimationsModule,
FormsModule,
],
declarations: [
AppComponent,
DebouncePipe,
TrackingPipe,
],
providers: [
TrackingService,
],
bootstrap: [AppComponent]
})
export class AppModule { }
(function (global) {
var angVer = '5.0.0';
System.config({
transpiler: 'ts',
typescriptOptions: {
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"lib": [ "es2015", "dom" ],
"module": "commonjs",
"moduleResolution": "node",
"noImplicitAny": true,
"sourceMap": true,
"suppressImplicitAnyIndexErrors": true,
"target": "es5"
},
meta: {
'typescript': {
"exports": "ts"
}
},
paths: {
'npm:': 'https://unpkg.com/',
'gh:': 'https://raw.githubusercontent.com/'
},
map: {
"app": "app",
"rxjs": "npm:rxjs@5.4.3",
"ts": "npm:plugin-typescript@7.1.0/lib/plugin.js",
"typescript": "npm:typescript@2.4.2/lib/typescript.js",
"@angular/core": "npm:@angular/core@" + angVer + "/bundles/core.umd.js",
"@angular/common": "npm:@angular/common@" + angVer + "/bundles/common.umd.js",
"@angular/compiler": "npm:@angular/compiler@" + angVer + "/bundles/compiler.umd.js",
"@angular/platform-browser": "npm:@angular/platform-browser@" + angVer + "/bundles/platform-browser.umd.js",
"@angular/platform-browser-dynamic": "npm:@angular/platform-browser-dynamic@" + angVer + "/bundles/platform-browser-dynamic.umd.js",
"@angular/http": "npm:@angular/http@" + angVer + "/bundles/http.umd.js",
"@angular/router": "npm:@angular/router@" + angVer + "/bundles/router.umd.js",
"@angular/forms": "npm:@angular/forms@" + angVer + "/bundles/forms.umd.js",
"@angular/animations": "npm:@angular/animations@" + angVer + "/bundles/animations.umd.js",
"@angular/animations/browser": "npm:@angular/animations@" + angVer + "/bundles/animations-browser.umd.js",
"@angular/platform-browser/animations": "npm:@angular/platform-browser@" + angVer + "/bundles/platform-browser-animations.umd.js",
"@angular/flex-layout": "npm:@angular/flex-layout@2.0.0-beta.9"
},
// 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'
}
}
});
if (!global.noBootstrap) { bootstrap(); }
// Bootstrap the `AppModule`(skip the `app/main.ts` that normally does this)
function bootstrap() {
// Stub out `app/main.ts` so System.import('app') doesn't fail if called in the index.html
System.set(System.normalizeSync('app/main.ts'), System.newModule({ }));
// bootstrap and launch the app (equivalent to standard main.ts)
Promise.all([
System.import('@angular/platform-browser-dynamic'),
System.import('app/app.module')
])
.then(function (imports) {
var platform = imports[0];
var app = imports[1];
platform.platformBrowserDynamic().bootstrapModule(app.AppModule);
})
.catch(function(err){ console.error(err); });
}
})(this);
import { ChangeDetectorRef, NgZone, Pipe } from '@angular/core';
@Pipe({name: 'debounce', pure: false})
export class DebouncePipe {
private currentValue: any = null;
private transformValue: any = null;
private timeoutHandle: number = -1;
constructor(
private changeDetector: ChangeDetectorRef,
private zone: NgZone,
) {
}
transform(value: any, debounceTime?: number): any {
if (this.currentValue == null) {
this.currentValue = value;
return value;
}
if (this.currentValue === value) {
// there is no value that needs debouncing at this point
clearTimeout(this.timeoutHandle);
return value;
}
if (this.transformValue !== value) {
// there is a new value that needs to be debounced
this.transformValue = value;
clearTimeout(this.timeoutHandle);
this.timeoutHandle = setTimeout(() => {
this.zone.run(() => {
this.currentValue = this.transformValue;
this.transformValue = null;
this.changeDetector.markForCheck();
});
}, typeof debounceTime == 'number' ? debounceTime : 500);
}
return this.currentValue;
}
}
import {Injectable} from '@angular/core';
@Injectable()
export class TrackingService {
private wordsUsed: Set<string> = new Set<string>();
public addWordUsed(word: string) {
this.wordsUsed.add(word);
}
public getWords(): string[] {
return Array.from(this.wordsUsed);
}
}
import { ChangeDetectorRef, NgZone, Pipe } from '@angular/core';
import{ TrackingService } from './tracking.service';
@Pipe({name: 'track', pure: true})
export class TrackingPipe {
constructor(
private trackingService: TrackingService,
private changeDetector: ChangeDetectorRef,
private zone: NgZone,
) {
}
transform(value: string): string {
Promise.resolve().then(() => {
this.trackingService.addWordUsed(value);
this.zone.run(() => this.changeDetector.markForCheck());
});
return value;
}
}