angular.js - How does angularjs elegantly implement an activation style that triggers one of multiple buttons?

Question

As shown in the picture, there are three buttons. Click any one of them and the button will turn into a blue background, and the other two buttons will return to the default white color

<button type="button" class="btn" ng-click='toggle()' ng-class='active'>按钮1</button>
<button type="button" class="btn " ng-click='toggle()'>按钮2</button>
<button type="button" class="btn " ng-click='toggle()'>按钮3</button>

In controller:

$scope.toggle=function(){
  ··· 
}

Answer 1

Little Elegance: demo