AngularJS的filter，中文名“过滤器”是用来过滤变量的值，或者格式化输出，得到自己所期望的结果或格式的东东。AngularJS中有一个filterFilter函数用来对集合过滤，非常方便。
源代码大致如下：
function filterFilter(){ return function(aray, expression comparator){ if(!isArray(array)) return array; var comparatorType = typeof(comparator), predicates = [], evaluatedObjects = []; predicates.check = function(value){ for(var j = 0; j < predicates.length; jii){ if(!predicates[j](value){ return false; }) } return true; } if(comparatorType != 'function'{ if(comparatorType === 'boolean' && comparator){ comparator = function(obj, text){ return angular.equals(obj, text); } } else { comparator = function(obj, text){ ... } } }) } }
controller部分如下：
angular .module('app') .controller('MainCtrl', ['$scope', function($scope) { $scope.users = $scope.users = [ {name: '', email: '', joined: 2015-1-1} ]; $scope.filter = { fuzzy: '', name: '' }; ... }]);
搜索所有任意字段
<input type="text" ng-model="filter.any" > <tr ng-repeat="user in users | filter: filter.any"> <td>{{user.name}}</td> <td>{{user.email}}</td> <td>{{user.joined | date}}</td> </tr>
搜索某个字段
<input type="text" ng-model="filter.name"> <tr ng-repeat="user in users | filter: filter.any | filter: {name: filter.name}"> <td>{{user.name}}</td> <td>{{user.email}}</td> <td>{{user.joined | date}}</td> </tr>
如果想name字段完全匹配：
<tr ng-repeat="user in users | filter: filter.any | filter: {name: filter.name}：true"> <td>{{user.name}}</td> <td>{{user.email}}</td> <td>{{user.joined | date}}</td> </tr>
搜索时间段
contrlller部分修改为：
angular .module('app') .controller('MainCtrl', ['$scope', function($scope) { $scope.users = $scope.users = [ {name: '', email: '', joined: 2015-1-1} ]; $scope.filter = { fuzzy: '', name: '' }; $scope.minDate = new Date('January 1, 2000'); $scope.maxDate = new Date(); $scope.min = function(actual, expected) { return actual >= expected; }; $scope.max = function(actual, expected) { return actual <= expected; }; }]);
页面部分为：
<input type="text" ng-model="fromDate" data-min-date="{{minDate}}"> <input type="text" ng-model="untilDate" data-max-date="{{maxDate}}"> <tr ng-repeat="user in users | filter: filter.any | filter: {name: filter.name} | filter: {joined: untilDate}:max | filter: {joined: beforeDate}:min"> <td>{{user.name}}</td> <td>{{user.email}}</td> <td>{{user.joined | date}}</td> </tr>