AngularJS 过滤器
AngularJS 过滤器可以使用一个管道字符（ | ）添加到表达式和指令中
AngularJS 过滤器
AngularJS 过滤器可用于转换数据
| 过滤器 | 描述 |
|---|---|
| currency | 格式化数字为货币格式 |
| filter | 从数组项中选择一个子集 |
| lowercase | 格式化字符串为小写 |
| orderBy | 根据某个表达式排列数组 |
| uppercase | 格式化字符串为大写 |
在表达式中添加过滤器
过滤器可以通过一个管道字符（ | ）和一个过滤器添加到表达式中
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uppercase 过滤器将字符串格式化为大写
<!DOCTYPE html> <meta charset="utf-8"> <link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <script src="http://cdn.bootcss.com/angular.js/1.4.6/angular.min.js"></script> <div ng-app="myApp" ng-controller="myCtrl"> <p>姓名为 {{ firstName + " " + lastName | uppercase }}</p> </div> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer> <script> var app = angular.module('myApp', []); app.controller('myCtrl', function($scope) { $scope.firstName = "Li"; $scope.lastName = "Bai"; }); </script>
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lowercase 过滤器将字符串格式化为小写
<!DOCTYPE html> <meta charset="utf-8"> <link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <script src="http://cdn.bootcss.com/angular.js/1.4.6/angular.min.js"></script> <div ng-app="myApp" ng-controller="myCtrl"> <p>姓名为 {{ firstName + " " + lastName | lowercase }}</p> </div> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer> <script> var app = angular.module('myApp', []); app.controller('myCtrl', function($scope) { $scope.firstName = "Li"; $scope.lastName = "Bai"; }); </script>
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currency 过滤器
currency 过滤器将数字格式化为货币格式
<!DOCTYPE html> <meta charset="utf-8"> <link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <script src="http://cdn.bootcss.com/angular.js/1.4.6/angular.min.js"></script> <div ng-app="myApp" ng-controller="myCtrl"> <input type="number" ng-model="quantity"> <input type="number" ng-model="price"> <p>总价 = {{ (quantity * price) | currency }}</p> </div> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer> <script> var app = angular.module('myApp', []); app.controller('myCtrl', function($scope) { $scope.quantity = 10 $scope.price = 13.3 }); </script>
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orderBy 过滤器
orderBy 过滤器根据表达式排列数组
orderBy 过滤器可以通过一个管道字符（|）和一个过滤器添加到指令中，该过滤器后跟一个冒号和一个属性名称
<!DOCTYPE html> <meta charset="utf-8"> <link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <script src="http://cdn.bootcss.com/angular.js/1.4.6/angular.min.js"></script> <div ng-app="myApp" ng-controller="namesCtrl"> <ul> <li ng-repeat="x in names | orderBy:'country'"> {{ x.name + ', ' + x.province }}</li> </ul> </div> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer> <script> angular.module('myApp', []).controller('namesCtrl', function($scope) { $scope.names = [ {name:'永定土楼',province:'福建'}, {name:'都江堰',province:'四川'}, {name:'凤凰古城',province:'湖南'} ]; }); </script>
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filter 过滤器
filter 过滤器从数组中选择一个子集
filter 过滤器可以通过一个管道字符（|）和一个过滤器添加到指令中，该过滤器后跟一个冒号和一个模型名称
<!DOCTYPE html> <meta charset="utf-8"> <link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <script src="http://cdn.bootcss.com/angular.js/1.4.6/angular.min.js"></script> <div ng-app="myApp" ng-controller="namesCtrl"> <p><input type="text" ng-model="test"></p> <ul> <li ng-repeat="x in names | filter:test | orderBy:'province'"> {{ (x.name | uppercase) + ', ' + x.province }} </li></ul> </div> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer> <script> angular.module('myApp', []).controller('namesCtrl', function($scope) { $scope.names = [ {name:'永定土楼',province:'福建'}, {name:'都江堰',province:'四川'}, {name:'凤凰古城',province:'湖南'} ]; }); </script>
自定义过滤器
下面的代码自定义了一个过滤器 reverse 用于将字符串反转
<!DOCTYPE html> <meta charset="utf-8"> <link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <div ng-app="myApp" ng-controller="myCtrl"> 站点: {{ msg | reverse }} </div> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer> <script src="http://cdn.bootcss.com/angular.js/1.4.6/angular.min.js"></script> <script> var app = angular.module('myApp', []); app.controller('myCtrl', function($scope) { $scope.msg = "简单教程"; }); app.filter('reverse', function() { return function(text) { return text.split("").reverse().join(""); } }); </script>