Angular 1.4: Empty Fiddle

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HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/twitter-bootstrap/2.0.4/css/bootstrap-combined.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.6.0/angular.min.js"></script>
<div ng-controller="MyCtrl" >
  <div class="wrap">
    <button class="btn btn-mini pull-left">A</button>
    <button class="btn btn-mini pull-right" ng-disabled="b">B</button> 
  </div>
  <button ng-click="b=!b">+</button>
</div>

CSS

div.wrap {
  width: 50px;
}
button {
  overflow: hidden;
}

JavaScript

angular.module('App',[])
	.controller('MyCtrl', ['$scope', function ($scope) {
  	$scope.b = true;
    }
])