AngularJS 指令ng-class

使用g-class 动态设置元素的类，方法是绑定一个代表所有需要添加的类的表达式。重复的类不会添加。当表达式发生变化，先前添加的类会被移除，新类会被添加。

<!doctype html>
<html ng-app="myApp">
<head>
  <link rel="stylesheet" href="//cdn.jsdelivr.net/foundation/4.3.2/css/foundation.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.0-rc.2/angular.js"></script>
</head>
<body>
  
<div ng-controller="LotteryController">
  <div ng-class="{red: x > 5}" ng-if="x > 5">
    You won!
  </div>
  <button ng-click="x = generateNumber()" ng-init="x = 0">Draw Number</button>
  <p>Number is: {{ x }}</p>
</div>
  
</body>
</html>

 

.red {
  background-color: red;
}

 

angular.module('myApp', [])
.controller('LotteryController', function($scope) {
  $scope.generateNumber = function() {
    return Math.floor((Math.random()*10)+1);
  };
});

 

posted @ 2015-10-03 13:31  Byron12345  阅读(143)  评论(0)  编辑  收藏  举报