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I am trying to setup my first angular2 application as an experiment and am using the latest beta release.
I am facing a weird issue where the variable i am using in my view is not being updated after setting a timeout.
@Component({ selector: "my-app", bindings: [] }) @View({ templateUrl: "templates/main.component.html", styleUrls: ['styles/out/components/main.component.css'] }) export class MainComponent { public test2 = "initial text"; constructor() { setTimeout(() => { this.test2 = "updated text"; }, 500); } } As you can see i have a variable named test2 and in the constructor i set a timeout of 500 ms where i am updating the value to "updated text".
Then in my view main.component.html i simply use:
{{ test2 }} But the value will never be set to "updated text" and stays on "initial text" forever even though the update part is being hit. If i follow the angular2 tutorial they dont really give me an answer to this solution. Was wondering if anyone would have an idea of what i am missing here.
edit: my full code i am using including the bootstrap and html etc
<html> <head> <title>Angular 2</title> <script src="/node_modules/systemjs/dist/system.src.js"></script> <script src="/node_modules/reflect-metadata/reflect.js"></script> <script src="/node_modules/angular2/bundles/angular2.dev.js"></script> <script src="/node_modules/q/q.js"></script> <script src="/node_modules/jquery/dist/jquery.js"></script> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <script src="/bower_components/breeze-client/breeze.debug.js"></script> <script src="/bower_components/datajs/datajs.js"></script> <script src="/bower_components/bootstrap-less/js/collapse.js"></script> <script src="/bower_components/bootstrap-less/js/modal.js"></script> <script src="/bower_components/signalr/jquery.signalR.js"></script> <script src="http://localhost:64371/signalr/js"></script> <link href="styles/out/main.css" type="text/css" rel="stylesheet" /> <script> System.config({ map: { rxjs: '/node_modules/rxjs' // added this map section }, packages: {'scripts/out': {defaultExtension: 'js'}, 'rxjs': {defaultExtension: 'js'}} }); System.import('scripts/out/main'); </script> </head> <body> <my-app>loading...</my-app> </body> </html> main.ts with the bootstrap:
import {Component} from 'angular2/core'; import {bootstrap} from 'angular2/platform/browser' import {COMMON_DIRECTIVES} from './constants'; import {MainComponent} from './components/main.component' bootstrap(MainComponent); main-component.html
{{ test2 }} 
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As Vlado said, it should work ;-)
I think that the angular2-polyfills.js library should be included into your page. I can't see it. This file is essentially a mashup of zone.js and reflect-metadata. Zones take part of the detection of updates.
You could have a look at this video where Bryan Ford explains what it is: https://www.youtube.com/watch?v=3IqtmUscE_U.
Hope it helps you, Thierry
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That should work. Do you have any other errors in console?
@Component({ selector: 'my-app', template: `<h1>Hello {{title}}</h1>` }) export class App { public title: string = "World"; constructor() { setTimeout(() => { this.title = "Brave New World" }, 1000);) } } Look at this Plunker: http://plnkr.co/edit/XaL4GoqFd9aisOYIhuXq?p=preview
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