CODEWITHSUNDEEP
javascriptangular
Satch3000
Satch3000

Reputation: 49364

Angular 2 More than one component on same page

I am working from the Angular 2 quick start code on app.component.ts file.

The file looks like this:

import {Component} from 'angular2/core';

@Component({
    selector: 'app',
    template: `<h1>Title Here</h1>'
})
export class AppComponent { }

This works as expected.

What I want to do is to add another component on this same page ... so I tried this:

import {Component} from 'angular2/core';
import {ComponentTwo} from 'angular2/core';

@Component({
    selector: 'app',
    template: `<h1>Title Here</h1>'
}),

@Component({
    selector: 'appTwo',
    template: `<h1>Another Title Here</h1>'
})
export class AppComponent { }

This doesn't work...Is it that I'm doing something wrong or is this not allowed?

Upvotes: 14

Views: 39894

Answers (2)

Thierry Templier
Thierry Templier

Reputation: 202138

You can't have a component with two component decorators (@Component). You need to create two different classes for this:

@Component({
    selector: 'app',
    template: `<h1>Title Here</h1>`
})
export class AppComponent { }

@Component({
    selector: 'appTwo',
    template: `<h1>Another Title Here</h1>`
})
export class AppComponent1 { }

Then you can use the approach from the Gunter's answer...

Upvotes: 3

G&#252;nter Z&#246;chbauer
G&#252;nter Z&#246;chbauer

Reputation: 657068

You can't have two root components with the same selector in your page, you also can't have two @Component() decorators on the same class.

If your components have different selectors, just run bootstrap for each root component

@Component({
    selector: 'app',
    template: '<h1>AppComponent1</h1>'
})
export class AppComponent1 { }

@Component({
    selector: 'appTwo',
    template: '<h1>AppComponent2</h1>'
})
export class AppComponent2 { }


bootstrap(AppComponent1)
bootstrap(AppComponent2)

There is an open issue to support overriding the selector to be able to add a root component multiple times
- https://github.com/angular/angular/issues/915

Upvotes: 20

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