AngularJS directive ng-href can be used to use a template to create href. Directly using it in href can make the link broken before Angular get a chnce to evaluate it.
<div ng-app="myApp" ng-controller='MyCtrl'>
<button ng-click="link1='/tutorials/'">click to set variable link1</button><br/>
<a ng-href="{{link1}}">This will become a link if variable link1 is set</a>
</div>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.3/angular.min.js"></script>
<script>
var module = angular.module('myApp', []);
module.controller('MyCtrl', function($scope) {});
</script>
