<html><body><div ng-app="" ng-init="firstName='John'"><p>在输入框中尝试输入:</p><p>姓名: <input type="text" ng-model="firstName"></p><p>你输入的为: {{ firstName }}</p></div><script src="https://apps.bdimg.com/libs/angular.js/1.3.9/angular.min.js"></script></body></html>