html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div ng-app="myApp">
<div ng-controller="firstController">
<input type="text" ng-model="name">{{name}}
</div>
</div>
<script type="text/javascript" src="../../vendor/angular/angularJs.js"></script>
<script type="text/javascript" src="app/index.js"></script>
</body>
</html>
js:
angular.module('myApp',[]).controller('firstController',function ($scope) {
$scope.name = "dyk";
$scope.count = 2;
$scope.data = {
name:'李四',
count:20
}
//观察name 当一个model值发生改变的时候 都会触发第二个函数
$scope.$watch('name',function (newValue, oldValue) {
$scope.count++;
if($scope.count>30){
$scope.name = '已经大于30次了';
}
});
$scope.$watch('data',function () {
//指定第三个参数为true 意思是说如果触发了data对象里的任何一个值就可以触发监听
},true);
});
最终结果：
