我应该在选择元素中绑定什么事件来检测选择更改

Question

我想更新表单页面上的内插文本，并在用户在

  <div class="form-group row">
    <label for="unitlabel" class="col-sm-2 col-form-label">Units</label>
    <select name="Units"
    [(ngModel)] = "units"
    (onTouched)="updateUnits()">
      <option value="US" selected>US</option>
      <option value="Metric">Metric</option>
    </select>
  </div>

Answer 1

LISTEN to the change event

<select name="Units"
[(ngModel)] = "units"
(change)="updateUnits()">