Convert-Inline ng-重复过滤器到自定义过滤器 - angularjs

Question

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script> 
<div ng-app="myApp" ng-controller="myCtrl as vm"> 
    <form class="col2"> 
    <label for="filter-online"> 
    Filter by Online 
    </label> 
    <div class="select"> 
     <select id="filter-online" ng-model="vm.online" class="form-control" ng-options="online for online in vm.onlines"> 
     <option value="">All</option> 
     </select> 
    </div> 
    </form> 

    <form class="col2"> 
    <label for="filter-productType"> 
    Filter by Product Type 
    </label> 
    <div class="select"> 
     <select id="filter-productType" ng-model="vm.productType" class="form-control" ng-options="productType for productType in vm.productTypes"> 
     <option value="">All</option> 
    </select> 
    </div> 
    </form> 

    <table style="margin-top: 30px"> 
    <tr ng-repeat="lim in vm.stockLimits | filter:{online:vm.online || undefined, productType: vm.productType || undefined}"> 
     <td>{{lim.online}}</td> 
     <td>{{lim.productType}}</td> 
    </tr> 
    </table> 
</div> 

angular.module("myApp", []) 
    .controller("myCtrl", function($scope) { 
    var vm = this; 
    vm.onlines = ["Men", "Kids", "Ladies"]; 
    vm.productTypes = ["Shirt", "Shoe", "Belt", "Top"]; 
    vm.stockLimits = [{ 
     id: 1, 
     online: "Men", 
     productType: "Shirt" 
    }, { 
     id: 2, 
     online: "Men", 
     productType: "Shoe" 
    }, { 
     id: 3, 
     online: "Kids", 
     productType: "Belt" 
    }, { 
     id: 4, 
     online: "Ladies", 
     productType: "Top" 
    }, 
    { 
     id: 5, 
     online: "Kids", 
     productType: null 
    }] 
    }) 

我想声明自定义过滤器来过滤online和productType并从角度html模板调用自定义过滤器。上面的内联过滤器工作正常，但我期待将内联过滤器转换为自定义过滤器。其实想要从html页面移动过滤器功能。 注意：productType可以为null。

Answer 1

您可以定义自定义过滤器下面的方式

angular.module("myApp").filter('productFilter', function() { 
    return function(items, filterOptions) { 
     if (!items) { 
      return [] 
     } 

     return items.filter(function(item) { 
      var isOnlinePassed = filterOptions.online ? (item.online === filterOptions.online) : true, 
       isProductTypePassed = filterOptions.productType ? (item.productType === filterOptions.productType) : true; 
      return isOnlinePassed && isProductTypePassed; 

     }) 
    } 
}) 

然后使用过滤器在你的模板，如：

<table style="margin-top: 30px"> 
    <tr ng-repeat="lim in vm.stockLimits | productFilter:{online:vm.online , productType: vm.productType}"> 
     <td>{{lim.online}}</td> 
     <td>{{lim.productType}}</td> 
    </tr> 
    </table>