AngularJS 中ng-model通過$watch動態取值
阿新 • • 發佈：2017-06-21
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這個例子的意思是，當xxxx的長度不超過6時，xxxx和yyyy兩個input的model是無關的，但當xxxx超過6，則yyyy會跟隨其值而變化。
<!doctype HTML>
<html>
<head lang="en">
<meta charset="utf-8">
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.7/angular.min.js"></script>
<script type="text/javascript">
var app = angular.module(‘app‘, []);
app.controller(‘AppCtrl‘, function($scope) {
$scope.xxxx = "apple";
$scope.yyyy = "banana";
$scope.$watch(‘xxxx‘, function() {
if ($scope.xxxx.length > 6) {
$scope.yyyy = "***" + $scope.xxxx + "***";
} else {}
});
});
</script>
</head>
<body ng-app="app" ng-controller="AppCtrl">
<input type="text" ng-model="xxxx">
<input type="text" ng-model="yyyy">
<br/>
<p>{{xxxx}}</p>
<p>{{yyyy}}</p>
</body>
</html>
AngularJS 中ng-model通過$watch動態取值