Event Binding

// binding.html
<button (click)="sayHello($event)"></button>
<button on-click="sayHello($event)"></button>

import { Component } from '@angular/core';

@Component({
    selector: 'selector',
    templateUrl: 'binding.html'
})
export class ComponentNameComponent{
    sayHello(e){
        console.log("saying hello");
        // e.target = button dom element
        // use e.stopPropogation() if required
    }
}