NG2vsREACT

Angular 2 events (close) uses round braces notation
<div class="widget-list">
    <someWidget
        [ngClass]="{isBlue: true}"
        *ngFor="let model of models"
        *ngIf="isLoaded"
        [model]="model"
        (close)="onClose($event, model)"
    ></someWidget>
</div>

React - just regular function
class SomeWidget {
  onClose(e, model) {
      // onClose reaction
  }
  render() {
      var widgets = models.map((model) => {
          return isLoaded ? (
              <someWidget
                  className="{{cn({isBlue: true})}}"
                  model="model"
                  close="onClose.bind(this, model)"
              ></someWidget>
          ) : null;
      }):
      return
      (
          <div class="widget-list">
              {{widgets}}
          </div>
      );
  }