Angular one time binding
HTML
<script src="https://code.angularjs.org/1.3.0/angular.js"></script>
<div ng-app="MyApp">
<div ng-controller="UserController as user">
Input: <input ng-model="user.name"></input><br>
Output: {{user.name}}<br>
Output (one-time binding): {{::user.name}}
</div>
JavaScript
angular.module('MyApp', [])
.controller('UserController', function () {
var vm = this;
vm.name = 'John Doe';
});