Angular 2 radio button events

It works,

<input type="radio" (change)="handleChange($event)" />

But you need code more to judge ‘selected’ or ‘unselected’.
You may try this in your *.ts file:

  export class Comp {

    private _prevSelected: any;

    handleChange(evt) {
      var target = evt.target;
      if (target.checked) {
        doSelected(target);
        this._prevSelected = target;
      } else {
        doUnSelected(this._prevSelected)
      }
    }

  }