点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src="https://cdn.staticfile.org/angular.js/1.4.6/angular.min.js"></script> </head> <body ng-app=""> <input ng-focus="count = count + 1" ng-init="count=0" /> <h1>{{count}}</h1> <p>该实例在输入框每次获取焦点时，计算变量 "count" 会自动加 1。</p> </body> </html>
运行结果
