Check if any error in your browser console, as your code is really working.
1.Make sure you have include all the dependence:
<link rel="stylesheet prefetch" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.3.2/angular.min.js"></script>
<script src="//angular-ui.github.io/bootstrap/ui-bootstrap-tpls-0.12.0.js"></script>
2.Notice ng-app="angularTypeahead" in the html and:
var myApp = angular.module("angularTypeahead", ["ui.bootstrap"]);
3.Notice ng-controller="TypeaheadCtrl" and:
myApp.controller("TypeaheadCtrl", function($scope) {...});
4.Full code:
Here is a full code live demo
<html>
<head>
<link rel="stylesheet prefetch" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.3.2/angular.min.js"></script>
<script src="//angular-ui.github.io/bootstrap/ui-bootstrap-tpls-0.12.0.js"></script>
</head>
<body>
<div ng-app="angularTypeahead">
<div class="container-fluid" ng-controller="TypeaheadCtrl">
<label for="states">Search for Answer</label>
<input type="text" name="questions" id="questionss" class="form-control select2-search search_query" placeholder="what are you looking for ?" ng-model='myquery' typeahead="question for question in questions | filter:$viewValue | limitTo:3">
<div class="form-group">
<button type="button" class="btn btn-primary" ng-click="search()">
Get an answer ! <i class="fa fa-search"></i>
</button>
</div>
</div>
</div>
<script type="text/javascript">
var myApp = angular.module("angularTypeahead", ["ui.bootstrap"]);
// setup controller and pass data source
myApp.controller("TypeaheadCtrl", function($scope) {
var Questions = ["hello", "hi", "question1", "question2", "question2"];
$scope.questions = Questions;
});
</script>
</body>
</html>
