main.ts
index.html
import { bootstrapApplication } from '@angular/platform-browser';
import { Component, Injectable } from '@angular/core';
@Injectable({ providedIn: 'root' })
export class CounterService {
value = 0;
inc() { this.value++; }
dec() { this.value--; }
reset() { this.value = 0; }
}
@Component({
selector: 'app-root',
standalone: true,
template: `
<h3>Services</h3>
<p>Counter: {{ counter.value }}</p>
<button (click)="counter.inc()">+</button>
<button (click)="counter.dec()">-</button>
<button (click)="counter.reset()">Reset</button>
`
})
export class App {
constructor(public counter: CounterService) {}
}
bootstrapApplication(App);
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Angular Services</title>
</head>
<body>
<app-root></app-root>
</body>
</html>