AngularJS 霸道的过滤器小结

2024-11-27 16:34:39

一、为什么使用过滤器？

在实际操作中，我们需要对统一数据源进行多次转换，比如我的货币单位，在不同的国家我们将用不同的符号表示。因此，你可能会想到在控制器中判断国家以显示不同的结果，但是过滤器却可以更好的帮助我们做到同样的效果。

过滤器将数据在被指令处理并显示到视图之前进行转换，而不必修改作用域中原有的数据，这样能够允许同一份数据在应用中的不同部分以不同形式得以展示。

接下来，我们详细讨论有关过滤器的用法

二、过滤单个数据的值

下表展示用于单个数据的内置过滤器

先来看看我们的准备案例，待会我们将在这个案例的基础上来使用内容过滤器

<!DOCTYPE>
<!-- use module -->
<html ng-app="exampleApp">
<head>
  <title>Angluar test</title>
  <meta charset="utf-8"/>
  <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
  <link rel="stylesheet" type="text/css" href="css/bootstrap-theme.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
</head>
<body>
  <dlv class="panel panel-default" ng-controller="defaultCtrl">
    <div class="panel panel-header">
      Products
      <span class="label label-primary">{{products.length}}</span>
    </div>
    <div class="panel panel-body">
      <table class="table table-striped table-bordered table-hover">
        <thead>
          <tr><th>Name</th><th>Category</th><th>Expiry</th><th>Price</th></tr>
        </thead>
        <tbody>
          <tr ng-repeat="p in products">
            <td>{{p.name}}</td>
            <td>{{p.category}}</td>
            <td>{{p.expiry}}</td>
            <td>{{p.price}}</td>
          </tr>
        </tbody>
      </table>
    </div>
  </dlv>

<script type="text/javascript" src="js/angular.min.js"></script>
<script type="text/javascript">
var myApp = angular.module("exampleApp", []);
myApp.controller("defaultCtrl", function ($scope) {
  $scope.products = [
    { name: "Apples", category: "Fruit", price: 1.20, expiry: 10 },
    { name: "Bananas", category: "Fruit", price: 2.42, expiry: 7 },
    { name: "Pears", category: "Fruit", price: 2.02, expiry: 6 },
    { name: "Tuna", category: "Fish", price: 20.45, expiry: 3 },
    { name: "Salmon", category: "Fish", price: 17.93, expiry: 2 },
    { name: "Trout", category: "Fish", price: 12.93, expiry: 4 },
    { name: "Beer", category: "Drinks", price: 2.99, expiry: 365 },
    { name: "Wine", category: "Drinks", price: 8.99, expiry: 365 },
    { name: "Whiskey", category: "Drinks", price: 45.99, expiry: 365 }
  ];
})
</script>
</body>
</html>

就是一个表格的形式来展示产品的详细情况的案例

1.格式化货币值

<tr ng-repeat="p in products">
  <td>{{p.name}}</td>
  <td>{{p.category}}</td>
  <td>{{p.expiry}}</td>
  <!-- 使用currency -->
  <td>{{p.price | currency}}</td>
</tr>

2.格式化数字值

<tr ng-repeat="p in products">
  <td>{{p.name}}</td>
  <td>{{p.category}}</td>
  <td>{{p.expiry}}</td>
  <!-- 保留小数点后3位 -->
  <td>{{p.price | number : 3}}</td>
</tr>

3.格式化日期

// 在控制器中添加
$scope.getExpiryDate = function (days) {
  var now = new Date();
  return now.setDate(now.getDate() + days);
}

<tr ng-repeat="p in products">
  <td>{{p.name}}</td>
  <td>{{p.category}}</td>
  <!-- 在视图中使用-->
  <td>{{getExpiryDate(p.expiry) | date : 'yyyy/MM/dd'}}</td>
  <!-- 货币单位本地化 -->
  <td>{{p.price}}</td>
</tr>

4.改变字符串大小写

<tr ng-repeat="p in products">
  <!-- 字母大小写 -->
  <td>{{p.name | uppercase}}</td>
  <td>{{p.category | lowercase}}</td>
  <td>{{getExpiryDate(p.expiry) | date : 'yyyy/MM/dd'}}</td>
  <!-- 货币单位本地化 -->
  <td>{{p.price}}</td>
</tr>

5.生成JSON

<tr ng-repeat="p in products">
  <!-- 生成JSON数据 -->
  <td>{{p.name | json}}</td>
  <td>{{p.category}}</td>
  <td>{{getExpiryDate(p.expiry) | date : 'yyyy/MM/dd'}}</td>
  <!-- 货币单位本地化 -->
  <td>{{p.price}}</td>
</tr>

6.本地化过滤器输出

需要移入本地化JS文件

<!-- 引入本地化文件 -->
<script type="text/javascript" src="js/angular-locale_zh-cn.js"></script>

<tr ng-repeat="p in products">
  <td>{{p.name}}</td>
  <td>{{p.category}}</td>
  <td>{{p.expiry}}</td>
  <!-- 货币单位本地化 -->
  <td>{{p.price | currency}}</td>
</tr>

三、过滤集合

1.限制项目的数量—limitTo过滤器

<!DOCTYPE>
<!-- use module -->
<html ng-app="exampleApp">
<head>
  <title>Angluar test</title>
  <meta charset="utf-8"/>
  <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
  <link rel="stylesheet" type="text/css" href="css/bootstrap-theme.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
</head>
<body>
  <dlv class="panel panel-default" ng-controller="defaultCtrl">
    <div class="panel panel-header">
      Products
      <span class="label label-primary">{{products.length}}</span>
    </div>
    <div class="panel panel-body">
      Limit: <select ng-model="limitVal" ng-options="item for item in limitRange"></select>
    </div>
    <div class="panel panel-body">
      <table class="table table-striped table-bordered table-hover">
        <thead>
          <tr><th>Name</th><th>Category</th><th>Expiry</th><th>Price</th></tr>
        </thead>
        <tbody>
          <!-- 只显示limitVal行 -->
          <tr ng-repeat="p in products | limitTo : limitVal">
            <td>{{p.name}}</td>
            <td>{{p.category}}</td>
            <td>{{p.expiry}}</td>
            <td>{{p.price | number : 2}}</td>
          </tr>
        </tbody>
      </table>
    </div>
  </dlv>
<script type="text/javascript" src="js/angular.min.js"></script>
<!-- 引入本地化文件 -->
<script type="text/javascript" src="js/angular-locale_zh-cn.js"></script>
<script type="text/javascript">
var myApp = angular.module("exampleApp", []);
myApp.controller("defaultCtrl", function ($scope) {
  $scope.products = [
    { name: "Apples", category: "Fruit", price: 1.20, expiry: 10 },
    { name: "Bananas", category: "Fruit", price: 2.42, expiry: 7 },
    { name: "Pears", category: "Fruit", price: 2.02, expiry: 6 },
    { name: "Tuna", category: "Fish", price: 20.45, expiry: 3 },
    { name: "Salmon", category: "Fish", price: 17.93, expiry: 2 },
    { name: "Trout", category: "Fish", price: 12.93, expiry: 4 },
    { name: "Beer", category: "Drinks", price: 2.99, expiry: 365 },
    { name: "Wine", category: "Drinks", price: 8.99, expiry: 365 },
    { name: "Whiskey", category: "Drinks", price: 45.99, expiry: 365 }
  ];
  // 显示的条数
  $scope.limitVal = '5';
  // 在限制条数的范围条项
  $scope.limitRange = [];
  for (var i = (0 - $scope.products.length); i <= $scope.products.length; i++) {
    $scope.limitRange.push(i.toString());
  }
})
</script>
</body>
</html>

单击下拉列表，根据提示显示不同的条数，负数表示从后往前取

2.选取项—filter过滤器

<!DOCTYPE>
<!-- use module -->
<html ng-app="exampleApp">
<head>
  <title>Angluar test</title>
  <meta charset="utf-8"/>
  <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
  <link rel="stylesheet" type="text/css" href="css/bootstrap-theme.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
</head>
<body>
  <dlv class="panel panel-default" ng-controller="defaultCtrl">
    <div class="panel panel-header">
      Products
      <span class="label label-primary">{{products.length}}</span>
    </div>

    <div class="panel panel-body">
      <table class="table table-striped table-bordered table-hover">
        <thead>
          <tr><th>Name</th><th>Category</th><th>Expiry</th><th>Price</th></tr>
        </thead>
        <tbody>
          <!-- 自定义过滤 -->
          <tr ng-repeat="p in products | filter : selectItems">
            <td>{{p.name}}</td>
            <td>{{p.category}}</td>
            <td>{{p.expiry}}</td>
            <td>{{p.price | number : 2}}</td>
          </tr>
        </tbody>
      </table>
    </div>
  </dlv>
<script type="text/javascript" src="js/angular.min.js"></script>
<!-- 引入本地化文件 -->
<script type="text/javascript" src="js/angular-locale_zh-cn.js"></script>
<script type="text/javascript">
var myApp = angular.module("exampleApp", []);
myApp.controller("defaultCtrl", function ($scope) {
  $scope.products = [
    { name: "Apples", category: "Fruit", price: 1.20, expiry: 10 },
    { name: "Bananas", category: "Fruit", price: 2.42, expiry: 7 },
    { name: "Pears", category: "Fruit", price: 2.02, expiry: 6 },
    { name: "Tuna", category: "Fish", price: 20.45, expiry: 3 },
    { name: "Salmon", category: "Fish", price: 17.93, expiry: 2 },
    { name: "Trout", category: "Fish", price: 12.93, expiry: 4 },
    { name: "Beer", category: "Drinks", price: 2.99, expiry: 365 },
    { name: "Wine", category: "Drinks", price: 8.99, expiry: 365 },
    { name: "Whiskey", category: "Drinks", price: 45.99, expiry: 365 }
  ];
  // 自定义过滤器
  $scope.selectItems = function (item) {
    // 仅仅保留类别为Fish或者name=='Beer'的行
    return item.category == 'Fish' || item.name == 'Beer';
  }

})
</script>
</body>
</html>

仅仅保留类别为Fish或者name=='Beer'的行

3.对项目进行排序—orderBy过滤器

<!DOCTYPE>
<!-- use module -->
<html ng-app="exampleApp">
<head>
  <title>Angluar test</title>
  <meta charset="utf-8"/>
  <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
  <link rel="stylesheet" type="text/css" href="css/bootstrap-theme.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
</head>
<body>
  <dlv class="panel panel-default" ng-controller="defaultCtrl">
    <div class="panel panel-header">
      Products
      <span class="label label-primary">{{products.length}}</span>
    </div>

    <div class="panel panel-body">
      <table class="table table-striped table-bordered table-hover">
        <thead>
          <tr><th>Name</th><th>Category</th><th>Expiry</th><th>Price</th></tr>
        </thead>
        <tbody>
          <!-- 通过价格按照升序排列 -->
          <!-- <tr ng-repeat="p in products | orderBy : 'price'"> -->
          <!-- price前加-表示按照降序排列 -->
          <!-- <tr ng-repeat="p in products | orderBy : '-price'"> -->
          <!-- 自定义排序 -->
          <!-- <tr ng-repeat="p in products | orderBy : customOrder"> -->
          <!-- 组合排序，保质期<5的降序排列，其他的按照价格升序排序 -->
          <tr ng-repeat="p in products | orderBy : [customOrder, '-price']">
            <td>{{p.name}}</td>
            <td>{{p.category}}</td>
            <td>{{p.expiry}}</td>
            <td>{{p.price | number : 2}}</td>

          </tr>
        </tbody>
      </table>
    </div>
  </dlv>

<script type="text/javascript" src="js/angular.min.js"></script>
<!-- 引入本地化文件 -->
<script type="text/javascript" src="js/angular-locale_zh-cn.js"></script>
<script type="text/javascript">
var myApp = angular.module("exampleApp", []);
myApp.controller("defaultCtrl", function ($scope) {
  $scope.products = [
    { name: "Apples", category: "Fruit", price: 1.20, expiry: 10 },
    { name: "Bananas", category: "Fruit", price: 2.42, expiry: 7 },
    { name: "Pears", category: "Fruit", price: 2.02, expiry: 6 },

    { name: "Tuna", category: "Fish", price: 20.45, expiry: 3 },
    { name: "Trout", category: "Fish", price: 12.93, expiry: 4 },
    { name: "Salmon", category: "Fish", price: 17.93, expiry: 2 },

    { name: "Beer", category: "Drinks", price: 2.99, expiry: 365 },
    { name: "Wine", category: "Drinks", price: 8.99, expiry: 365 },
    { name: "Whiskey", category: "Drinks", price: 45.99, expiry: 365 }
  ];
  // 自定义函数排序
  $scope.customOrder = function (item) {
    // 保质期<5的不排序，其他的按照价格升序排序
    return item.expiry < 5 ? 0 : item.price;
  }
})
</script>
</body>
</html>

保质期<5的不排序，其他的按照价格升序排序

四、链式过滤器

就是将过滤器串联起来综合使用

<!DOCTYPE>
<!-- use module -->
<html ng-app="exampleApp">
<head>
  <title>Angluar test</title>
  <meta charset="utf-8"/>
  <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
  <link rel="stylesheet" type="text/css" href="css/bootstrap-theme.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
</head>
<body>
  <dlv class="panel panel-default" ng-controller="defaultCtrl">
    <div class="panel panel-header">
      Products
      <span class="label label-primary">{{products.length}}</span>
    </div>

    <div class="panel panel-body">
      <table class="table table-striped table-bordered table-hover">
        <thead>
          <tr><th>Name</th><th>Category</th><th>Expiry</th><th>Price</th></tr>
        </thead>
        <tbody>
          <!-- 过滤链条，通过orderBy和limitTo共同作用 -->
          <tr ng-repeat="p in products | orderBy : [customOrder, '-price'] | limitTo : 5">
            <td>{{p.name}}</td>
            <td>{{p.category}}</td>
            <td>{{p.expiry}}</td>
            <td>{{p.price | number : 2}}</td>

          </tr>
        </tbody>
      </table>
    </div>
  </dlv>

<script type="text/javascript" src="js/angular.min.js"></script>
<!-- 引入本地化文件 -->
<script type="text/javascript" src="js/angular-locale_zh-cn.js"></script>

<script type="text/javascript">

var myApp = angular.module("exampleApp", []);

myApp.controller("defaultCtrl", function ($scope) {
  $scope.products = [
    { name: "Apples", category: "Fruit", price: 1.20, expiry: 10 },
    { name: "Bananas", category: "Fruit", price: 2.42, expiry: 7 },
    { name: "Pears", category: "Fruit", price: 2.02, expiry: 6 },

    { name: "Tuna", category: "Fish", price: 20.45, expiry: 3 },
    { name: "Trout", category: "Fish", price: 12.93, expiry: 4 },
    { name: "Salmon", category: "Fish", price: 17.93, expiry: 2 },

    { name: "Beer", category: "Drinks", price: 2.99, expiry: 365 },
    { name: "Wine", category: "Drinks", price: 8.99, expiry: 365 },
    { name: "Whiskey", category: "Drinks", price: 45.99, expiry: 365 }
  ];
  // 自定义函数排序
  $scope.customOrder = function (item) {
    // 保质期<5的不排序，其他的按照价格升序排序
    return item.expiry < 5 ? 0 : item.price;
  }

})
</script>
</body>
</html>

先按照自定义customOrder函数以price倒序排列，然后只取得5条数据

<tr ng-repeat="p in products | orderBy : [customOrder, '-price'] | limitTo : 5">

五、自定义过滤器

1.创建格式化数据值的过滤器

<!DOCTYPE>
<!-- use module -->
<html ng-app="exampleApp">
<head>
  <title>Angluar test</title>
  <meta charset="utf-8"/>
  <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
  <link rel="stylesheet" type="text/css" href="css/bootstrap-theme.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
</head>
<body>
  <dlv class="panel panel-default" ng-controller="defaultCtrl">
    <div class="panel panel-header">
      Products
      <span class="label label-primary">{{products.length}}</span>
    </div>

    <div class="panel panel-body">
      <table class="table table-striped table-bordered table-hover">
        <thead>
          <tr><th>Name</th><th>Category</th><th>Expiry</th><th>Price</th></tr>
        </thead>
        <tbody>

          <tr ng-repeat="p in products">
            <!-- 使用自定义过滤器 -->
            <td>{{p.name | labelCase}}</td>
            <td>{{p.category | labelCase : true}}</td>
            <td>{{p.expiry}}</td>
            <td>{{p.price | number : 2}}</td>
          </tr>
        </tbody>
      </table>
    </div>
  </dlv>

<script type="text/javascript" src="js/angular.min.js"></script>

<script type="text/javascript">

var myApp = angular.module("exampleApp", []);

myApp.controller("defaultCtrl", function ($scope) {
  $scope.products = [
    { name: "Apples", category: "Fruit", price: 1.20, expiry: 10 },
    { name: "Bananas", category: "Fruit", price: 2.42, expiry: 7 },
    { name: "Pears", category: "Fruit", price: 2.02, expiry: 6 },

    { name: "Tuna", category: "Fish", price: 20.45, expiry: 3 },
    { name: "Trout", category: "Fish", price: 12.93, expiry: 4 },
    { name: "Salmon", category: "Fish", price: 17.93, expiry: 2 },

    { name: "Beer", category: "Drinks", price: 2.99, expiry: 365 },
    { name: "Wine", category: "Drinks", price: 8.99, expiry: 365 },
    { name: "Whiskey", category: "Drinks", price: 45.99, expiry: 365 }
  ];
});
</script>
<!-- 引入自定义的过滤器 -->
<script type="text/javascript" src="js/createFilters.js"></script>
</body>
</html>

自定义过滤器，labelCase反转字符串

// js/createFilters.js文件
angular.module("exampleApp")
  .filter("labelCase", function () {
    return function (value, reverse) {
      if (angular.isString(value)) {
        var inter = reverse ? value.toUpperCase() : value.toLowerCase();
        return (reverse ? inter[0].toLowerCase() : inter[0].toUpperCase()) + inter.substr(1);
      } else {
        return value;
      }
    }
  })

2.创建集合过滤器

在createFilter中定义一个skip过滤函数

angular.module("exampleApp")
  .filter("labelCase", function () {
    return function (value, reverse) {
      if (angular.isString(value)) {
        var inter = reverse ? value.toUpperCase() : value.toLowerCase();
        return (reverse ? inter[0].toLowerCase() : inter[0].toUpperCase()) + inter.substr(1);
      } else {
        return value;
      }
    }
  })
  .filter("skip", function () {
    return function (value, count) {
      if (angular.isArray(value) && angular.isNumber(count)){
        if (count > value.length || count < 0) {
          return value;
        } else {
          // 跳过数组前两项
          return value.slice(count);
        }
      } else {
        return value;
      }
    }
  })

在视图中使用

<tr ng-repeat="p in products | skip : 2">
  <!-- 使用自定义过滤器 -->
  <td>{{p.name | labelCase}}</td>
  <td>{{p.category | labelCase : true}}</td>
  <td>{{p.expiry}}</td>
  <td>{{p.price | number : 2}}</td>
</tr>

移除前两项Apples和Bananas，然后显示

3.在已有的过滤器上搭建新的过滤器

在createFilter中添加take过滤器返回，将skip和limitTo两个过滤器方法综合起来

angular.module("exampleApp")
  .filter("labelCase", function () {
    return function (value, reverse) {
      if (angular.isString(value)) {
        var inter = reverse ? value.toUpperCase() : value.toLowerCase();
        return (reverse ? inter[0].toLowerCase() : inter[0].toUpperCase()) + inter.substr(1);
      } else {
        return value;
      }
    }
  })
  .filter("skip", function () {
    return function (value, count) {
      if (angular.isArray(value) && angular.isNumber(count)){
        if (count > value.length || count < 0) {
          return value;
        } else {
          // 跳过数组前两项
          return value.slice(count);
        }
      } else {
        return value;
      }
    }
  })
  // 在已有过滤器的基础上建立新的过滤器
  // 将上述的skip和limit两个过滤器合并
  .filter("take", function ($filter) {
    return function (data, skipCount, limitCount) {
      // 先跳过数组的前skipCount项
      var skipData = $filter("skip")(data, skipCount);
      // 接着只取limitCount行
      return $filter("limitTo")(skipData, limitCount);
    }
  })

在视图中使用：

<tr ng-repeat="p in products | take : 2 : 5">
<!-- 使用自定义过滤器 -->
  <td>{{p.name | labelCase}}</td>
  <td>{{p.category | labelCase : true}}</td>
  <td>{{p.expiry}}</td>
  <td>{{p.price | number : 2}}</td>
</tr>

先移除两项，然后值取5条数据

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AngularJS中的过滤器filter用法完全解析

在AngularJS的世界里,filter提供了一种格式化数据的方法,Angular也提供给我们了很多内建的过滤器,并且建立自定义过滤器也是相当的简单在HTML的模板绑定{{}}中,我们使用 | 来调用过滤器,比如,我们想让字符串全部大写字符显示: {{ name | uppercase }} 当然了,我们也可以在JavaScript中使用$filter服务来调用过滤器,还拿字符串大写来举例: app.controller('DemoController', ['$scope', '$filt
AngularJS过滤器filter用法实例分析

本文实例讲述了AngularJS过滤器filter用法.分享给大家供大家参考,具体如下: 这节我们来看看angularjs的过滤器filter. 在我们开发中经常需要在页面显示给用户的信息需要一定处理格式化,才能显示给用户.比如时间本地化,或者yyyy-MM-dd HH:mm:ss格式,数字精度格式化,本地化,人名格式化等等.在angularjs中为我们提供了叫filter的指令,让我们能够很轻易就能做到着一些列的功能,angularjs内部为我们提供了number等很多内置的filter.并且
详解AngularJS过滤器的使用

AnularJS的过滤器用来格式化需要展示给用户的数据,有很多实用的内置过滤器,也可以自己编写. 在HTML中的模板绑定符号{{ }}内通过|符号来调用过滤器.例如,假设我们希望将字符串转换成大写,可以对字符串中的每个字符都单独进行转换操作,也可以使用过滤器: {{ name | uppercase }} 在JavaScript代码中可以通过$filter来调用过滤器.例如,在JavaScript代码中使用lowercase 过滤器: app.controller('DemoControlle
实例解析angularjs的filter过滤器

现在公司用ionic,就是基于angularjs封装了一些api用于webapp,最近用的angularjs的filter确实省了很多代码,现在总结一下! ng比较鸡肋的过滤器,这里就一笔带过吧!鸡汤类常用的filter后面上例子. lowercase(小写) {{ lastName | lowercase }} uppercase(大写) {{ lastName | uppercase }} number(格式化数字) number过滤器可以为一个数字加上千位分割,像这样,123,456,78
AngularJS中的过滤器使用详解

过滤器是用来更改修改数据,并且可以在表达式或使用管道符指令将其归入.以下是常用的过滤器的列表. 小写过滤器添加小写的过滤器,使用管道符的表达式.在这里添加小写过滤器,以小写字母打印学生姓名. Enter first name:<input type="text" ng-model="student.firstName"> Enter last name: <input type="text" ng-model="s
AngularJS基础知识笔记之过滤器

过滤器是用来更改修改数据,并且可以在表达式或使用管道符指令将其归入.以下是常用的过滤器的列表. S.No. 名称描述 1 大写转换文本为大写文本. 2 小写转换文本为小写文本. 3 货币货币格式格式文本. 4 过滤器过滤数组中它根据所提供的标准的一个子集. 5 排序排序提供标准的基础数组. 大写过滤器添加大写的过滤器使用管道符的表达式.在这里,添加了大写过滤器,全部用大写字母打印学生姓名. Enter first name:<input type="text" ng
详解AngularJS中自定义过滤器

过滤器(filter)正如其名,作用就是接收一个输入,通过某个规则进行处理,然后返回处理后的结果.主要用在数据的格式化上,例如获取一个数组中的子集,对数组中的元素进行排序等.ng内置了一些过滤器,它们是:currency(货币).date(日期).filter(子串匹配).json(格式化json对象).limitTo(限制个数).lowercase(小写).uppercase(大写).number(数字).orderBy(排序).总共九种.除此之外还可以自定义过滤器,这个就强大了,可以满足任何
Angularjs之filter过滤器(推荐)

现在公司用ionic,就是基于angularjs封装了一些api用于webapp,最近用的angularjs的filter确实省了很多代码,现在总结一下! ng比较鸡肋的过滤器,这里就一笔带过吧!鸡汤类常用的filter后面上例子. lowercase(小写) {{ lastName | lowercase }} uppercase(大写) {{ lastName | uppercase }} number(格式化数字) number过滤器可以为一个数字加上千位分割,像这样,123,456,78
详解AngularJS中的filter过滤器用法

系统的学习了一下angularjs,发现angularjs的有些思想根php的模块smarty很像,例如数据绑定,filter.如果对smarty比较熟悉的话,学习angularjs会比较容易一点.这篇简单说一下angularjs的filter功能,angularjs的filter功能可分为二种,一种是内置的过滤器,一种是自定义的. 一,内置的过滤器 1,uppercase,lowercase大小转换 {{ "lower cap string" | uppercase }} //结果:
Angularjs过滤器使用详解

给大家介绍下什么是 AngularJS? AngularJS是一个为动态WEB应用设计的结构框架.它能让你使用HTML作为模板语言,通过扩展HTML的语法,让你能更清楚.简洁地构建你的应用组件.它的创新点在于,利用

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