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
}
//觀察name 當一個model值發生改變的時候 都會觸發第二個函數
$scope.$watch('name',function (newValue, oldValue) {
$scope.count++;
if($scope.count>30){
$scope.name = '已經大於30次了';
}
});
$scope.$watch('data',function () {
//指定第三個參數為true 意思是說如果觸發了data對象里的任何一個值就可以觸發監聽
},true);
});
最終結果：
