多个单选按钮组均可在同一次单击上切换

Answer 1

只需给每个组一个唯一的名称

<div>
  <input [formControl]="ctrlx" type="radio" [value]="true" id="idx" name="a"   
   autocomplete="off"/>
  <label for="idx">Yes</label>

  <input [formControl]="ctrlx" type="radio" [value]="false" id="idy" name="a"   
  autocomplete="off" />
  <label for="idy">No</label>
</div>