Modal window has large background - angularjs

Question

I am using the iu.bootstrap.modal popup window on one of my views. The modal windows displays correctly except that it looks like it is inside a larger white frame.
What is causing this white frame to appear behind my modal window?
Here is my view:
<button type="button" id="btnModal" name="modal1" ng-click="openModal()" class="btn btn-primary pull-right">Open Modal</button>
<!--Modal-->
<script type="text/ng-template" id="myModal.html">
<div class="modal-content">
<div class="modal-header">
<h3 class="modal-title">{{title}}</h3>
</div>
<div class="modal-body">
<span id="error-message" class="text-danger" style="white-space:pre">{{message}}</span>
</div>
<div class="modal-footer">
<button id="btn-ok" class="btn btn-primary" type="button" ng-click="ok()">OK</button>
</div>
</div>
</script>
And my controller
$scope.openModal = function () {
var title = "Modal Title";
var message = "Modal Message";
var modalInstance = $uibModal.open ({
animation: true,
templateUrl: 'myModal.html',
size: 'sm',
controller: function ($scope) {
$scope.title = title;
$scope.message = message;
$scope.ok = function () { modalInstance.dismiss() };
}
});
};
What causes the window to appear behind the modal?

Answer 1

In ui.bootstrap documentation (https://angular-ui.github.io/bootstrap/#/modal)
<script type="text/ng-template" id="myModalContent.html">
<div class="modal-header">
<h3 class="modal-title" id="modal-title">I'm a modal!</h3>
</div>
<div class="modal-body" id="modal-body">
<ul>
<li ng-repeat="item in $ctrl.items">
{{ item }}
</li>
</ul>
Selected: <b>{{ $ctrl.selected.item }}</b>
</div>
<div class="modal-footer">
<button class="btn btn-primary" type="button" ng-click="$ctrl.ok()">OK</button>
<button class="btn btn-warning" type="button" ng-click="$ctrl.cancel()">Cancel</button>
</div>
</script>
There is not a <div> of modal-content class. But you have at the beginning of the modal. The modal-content is a css Bootstrap class and it may cause the problem.