<script src="/js/angular.js1.4.6/angular.min.js"></script>
<div ng-app="myApp" ng-controller="myCtrl">
名: <input type="text" ng-model="firstName"><br>
姓: <input type="text" ng-model="lastName"><br>
姓名: {{firstName + " " + lastName}}
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.firstName = "John";