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I am using Angular 2.0.0-beta.0 with typescript. I was able to make ajax call with window['fetch'] out of the box without any problem (and I did not need to use any of the workarounds required in earlier versions.)
But I could not make the same ajax call working with angular2's http.
Here is the code to demo the issue. There are three files, index.html in the project folder, and boot.ts and app.component.ts in a subfolder called app.
app.component.ts:
import {Http, HTTP_PROVIDERS} from 'angular2/http';
import {Component} from 'angular2/core';
@Component({
selector: 'my-app',
providers: [HTTP_PROVIDERS],
template: '<h1>My First Angular 2 App</h1><button (click)="getTasks()">click</button>{{tasks}}'
})
export class AppComponent {
http: Http;
tasks = [];
constructor(http: Http) {
alert(http == null);
this.http = http;
}
getTasks(): void {
this.http.get('http://localhost:3000/tasks/norender');
//.map((res: Response) => res.json())
//it is important to have this subscribe call, since the
//request is only made if there is a subscriber
.subscribe(res => this.tasks = res);
}
}
boot.ts:
import {bootstrap} from 'angular2/platform/browser'
import {HTTP_PROVIDERS} from 'angular2/http';
import {AppComponent} from './app.component'
bootstrap(AppComponent, [HTTP_PROVIDERS]);
index.html:
<!DOCTYPE html>
<html>
<head>
<title>Angular 2 QuickStart</title>
<!-- 1. Load libraries -->
<script src="https://rawgithub.com/systemjs/systemjs/0.19.6/dist/system.js"></script>
<script src="https://code.angularjs.org/tools/typescript.js"></script>
<script src="https://code.angularjs.org/2.0.0-beta.0/angular2-polyfills.js"></script>
<script src="https://code.angularjs.org/2.0.0-beta.0/Rx.js"></script>
<script src="https://code.angularjs.org/2.0.0-beta.0/http.dev.js"></script>
<script src="https://code.angularjs.org/2.0.0-beta.0/angular2.dev.js"></script>
<!-- 2. Configure SystemJS -->
<script>
System.config({
transpiler: 'typescript',
typescriptOptions: {emitDecoratorMetadata: true},
packages: {'app': {defaultExtension: 'ts'}}
});
System.import('app/boot')
.then(null, console.error.bind(console));
</script>
</head>
<!-- 3. Display the application -->
<body>
<my-app>Loading...</my-app>
</body>
</html>
417
You should add an Http provider. You have two options:
import {HTTP_PROVIDERS} from 'angular2/http';
and:
ng.bootstrap(src.SomeComponent, [HTTP_PROVIDERS]);
On the component using the service:
import {HTTP_PROVIDERS} from 'angular2/http';
@Component({
...
providers: [HTTP_PROVIDERS]
...
})
93
I had a similar problem when I used an old version of the TypeScript compiler. I fixed it by changing the constructor argument from http: Http to @Inject(Http) http: Http. Of course, you need to import Inject to use it.
I'd try using the SystemJS release at https://code.angularjs.org/tools/system.js instead of the release at rawgithub.com.
1
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