Inaweza kutumia filtre kwenye AngularJS kusaidia kufomati data.

Kifaa cha Filtri za AngularJS

AngularJS ina filtre za kusaidia kubadilika data:

• currency Kusaidia kuzama namba kwa ukurasa chake chao kama mabara
• date Kusaidia kuzama tarehe kwa ukurasa chake chao
• filter Kusaidia kuwaona kijana kwenye matukio
• json Kusaidia kuzama kipindi kwa neno JSON
• limitTo Kusaidia kuzama kiwango cha matukio au herufi kwa neno kikubaliwa
• lowercase Kuzama neno kwa ukurasa chake chao
• number Kuzama namba kwa neno
• orderBy Kusaidia kufanya uadilifu wa matukio kwa kutumia muungano
• uppercase Kuzama neno kwa kubadilika kwa kipya kwa ukurasa chake chao

Kuingiza filtre kwenye muungano

Inaweza kutumia simu ya kusaidia | kuingiza filtre kwenye muungano, baada ya filtre moja.

uppercase Filtre ya kuzama neno kwa kubadilika kwa kipya kwa ukurasa chake chao

Mfano

<div ng-app="myApp" ng-controller="personCtrl">
<p>Jina ni {{ lastName | uppercase }}</p>
</div>

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lowercase Filtre ya kuzama neno kwa ukurasa chake chao

Mfano

<div ng-app="myApp" ng-controller="personCtrl">
名字是 {{ lastName | lowercase }}
</div>

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向指令添加过滤器

通过使用管道字符 | 后跟过滤器，可以将过滤器添加到指令中，例如 ng-repeat：

Mfano

orderBy 过滤器对数组进行排序：

<div ng-app="myApp" ng-controller="namesCtrl">

  

    {{ x.name + ', ' + x.country }}
  </li>
</ul>
</div>

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currency 过滤器

currency 过滤器将数字格式化为货币：

Mfano

Price: {{ price | currency }}
</div>

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有关 currency 过滤器的更多信息，请参阅我们的 AngularJS currency 过滤器参考手册。

filter 过滤器

filter 过滤器选择数组的子集。

filter 过滤器只能用于数组，它返回只包含匹配项的数组。

Mfano

返回包含字母 "i" 的名字：

<div ng-app="myApp" ng-controller="namesCtrl">

  

    {{ x }}
  </li>
</ul>
</div>

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有关 filter 过滤器的更多信息，请参阅我们的 AngularJS filter 过滤器参考手册。

根据用户输入过滤数组

通过在输入字段上设置 ng-model 指令，我们可以使用输入字段的值作为过滤器中的表达式。

在输入字段中输入一个字母，列表将根据匹配项进行缩小/扩大：

• Jani
• Carl
• Margareth
• Hege
• Joe
• Gustav
• Birgit
• Mary
• Kai

Mfano

<div ng-app="myApp" ng-controller="namesCtrl">


  

    {{ x }}
  </li>
</ul>
</div>

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根据用户输入对数组进行排序

Pika kichwa cha jadhaa kwa kubadilisha misingi wa orodha:

kwa kuzingatia kwenye kichwa cha jadhaa ng-click 指令, tunavyotea kipende kufanya kazi, kama kazi inayotofautisha misingi wa jumla:

Mfano

<div ng-app="myApp" ng-controller="namesCtrl">
<table border="1" width="100%">
  <tr>
    <th ng-click="orderByMe('name')">Name</th>
    <th ng-click="orderByMe('country')">Country</th>
  </tr>
  <tr ng-repeat="x in names | orderBy:myOrderBy">
    <td>{{x.name}}</td>
    <td>{{x.country}}</td>
  </tr>
</table>
</div>
<script>
angular.module('myApp', []).controller('namesCtrl', function($scope) {
  $scope.names = [
    {name:'Jani',country:'Norway'},
    {name:'Carl',country:'Sweden'},
    {name:'Margareth',country:'England'},
    {name:'Hege',country:'Norway'},
    {name:'Joe',country:'Denmark'},
    {name:'Gustav',country:'Sweden'},
    {name:'Birgit',country:'Denmark'},
    {name:'Mary',country:'England'},
    {name:'Kai',country:'Norway'}
  };
  $scope.orderByMe = function(x) {
    $scope.myOrderBy = x;
  }
});

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Filtri zaidi

Wewe unaweza kumisha filtri kwa kuregista mfunzi wa filtri mpya kwenye moduli:

Mfano

Kumisha filtri zaidi ya "myFormat":

<ul ng-app="myApp" ng-controller="namesCtrl">
  <li ng-repeat="x in names">
    {{x | myFormat}}
  </li>
</ul>
<script>
var app = angular.module('myApp', []);
app.filter('myFormat', function() {
  return function(x) {
    var i, c, txt = "";
    for (i = 0; i < x.length; i++) {
      c = x[i];
      if (i % 2 == 0) {
        c = c.toUpperCase();
      }
      txt += c;
    }
    return txt;
  };
});
app.controller('namesCtrl', function($scope) {
  $scope.names = ['Jani', 'Carl', 'Margareth', 'Hege', 'Joe', 'Gustav', 'Birgit', 'Mary', 'Kai'];
});

亲自试一试

myFormat 过滤器将每隔一个字符格式化为大写。