This time I will show you how to use AngularJS custom filter usage, and what are the precautions for using AngularJS custom filter usage. The following is a practical case, let's take a look.
Filter structure
{{带过滤数据 | 过滤器名：参数1：参数2：参数3.....}}
app.filter('过滤器名', function () {
return function (待过滤数据, 参数....) {
......
return 已过滤数据;
}Example 1: Whether to include
<!doctype html>
<html ng-app="myApp">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<script src="http://apps.bdimg.com/libs/angular.js/1.2.16/angular.min.js"></script>
</head>
<body>
<p ng-controller="myAppCtrl">
<p>
<table>
<tr>
<th>Name</th>
<th>Phone</th>
</tr>
<!--写法1-->
<tr ng-repeat="friend in friends |myfilter">
<!--写法2-->
<!--<tr ng-repeat="friend in newArr=(friends | myfilter)">-->
<td>{{friend.name}}</td>
<td>{{friend.phone}}</td>
</tr>
</table>
</p>
</p>
<script type="text/javascript">
var app = angular.module("myApp", []);
app.controller("myAppCtrl", ["$scope", function ($scope) {
$scope.friends = [{name: 'John', phone: '44555-1276'},
{name: 'Annie', phone: '800-BIG-MARY'},
{name: 'Mike', phone: '11555-4321'},
{name: 'Adam', phone: '33555-5678'},
{name: 'David', phone: '387555-8765'},
{name: 'Mikay', phone: '555-5678'}];
}]);
app.filter("myfilter", function () {
return function (input) {
var output = [];
angular.forEach(input, function (value, key) {
console.log("value==" + JSON.stringify(value));
console.log("value.phone类型==" + typeof (value.phone));
console.log("value.phone.indexOf==" + value.phone.indexOf("555"));
/*js中没有contains方法，使用indexOf来判断字符串是否包含*/
/*indexOf字符串出现的位置，没有则返回-1*/
//方法一：
if (value.phone.indexOf("555") >= 0) {
output.push(value);
}
//方法二：
// if (value.phone.indexOf("555") !== -1) {
// output.push(value);
// }
});
return output;
}
});
</script>
</body>
</html>Example 2: Reverse order
<!doctype html>
<html ng-app="myApp">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<script src="http://apps.bdimg.com/libs/angular.js/1.2.16/angular.min.js"></script>
</head>
<body>
<p ng-controller="myAppCtrl">
姓名:{{ name }}<br>
倒序:{{ name | reverse }}<br>
倒序并大写:{{ name | reverse:true }}
</p>
<script type="text/javascript">
var myAppModule = angular.module("myApp", []);
myAppModule.controller("myAppCtrl", ["$scope", function ($scope) {
$scope.name = "xuqiang";
}]);
myAppModule.filter("reverse", function () {
return function (input, uppercase) {
<!--input就是其中name代表的值。-->
<!--uppercase这个bool值，判断是否要进行大小写转换。-->
var out = "";
for (var i = 0; i < input.length; i++) {
out = input.charAt(i) + out;
}
if (uppercase) {
out = out.toUpperCase();
}
return out;
<!--返回过滤后的字符串-->
}
});
</script>
</body>
</html>Example 3: Replace
<!doctype html>
<html ng-app="myApp">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<script src="http://apps.bdimg.com/libs/angular.js/1.2.16/angular.min.js"></script>
</head>
<body ng-controller="myAppCtrl">
<p>
<p>
{{welcome | replaceHello}}<br/>
{{welcome | replaceHello:3:5}}<br/>
</p>
</p>
<script type="text/javascript">
var app = angular.module("myApp", []);
app.controller("myAppCtrl", ["$scope", function ($scope) {
$scope.welcome = "Hello AngularJs";
}]);
//自定义过滤器
app.filter('replaceHello', function () {
return function (input, n1, n2) {
console.log("input==" + input);
console.log("n1==" + n1);
console.log("n2==" + n2);
return input.replace(/Hello/, '您好');
}
});
</script>
</body>
</html>Example 4: Filter
<!doctype html>
<html ng-app="a3_3">
<head>
<title>自定义过滤器</title>
<script src="../Script/angular.min.js"
type="text/javascript"></script>
<style type="text/css">
body {
font-size: 12px;
}
ul {
list-style-type: none;
width: 408px;
margin: 0px;
padding: 0px;
}
ul li {
float: left;
padding: 5px 0px;
}
ul .odd {
color: #0026ff;
}
ul .even {
color: #ff0000;
}
ul .bold {
font-weight: bold;
}
ul li span {
width: 52px;
float: left;
padding: 0px 10px;
}
ul .focus {
background-color: #cccccc;
}
</style>
</head>
<body>
<p ng-controller="c3_3">
<ul>
<li ng-class="{{bold}}">
<span>序号</span>
<span>姓名</span>
<span>性别</span>
<span>年龄</span>
<span>分数</span>
</li>
<li ng-repeat=" stu in data | young:0"
ng-class-odd="'odd'"
ng-class-even="'even'">
<span>{{$index+1}}</span>
<span>{{stu.name}}</span>
<span>{{stu.sex}}</span>
<span>{{stu.age}}</span>
<span>{{stu.score}}</span>
</li>
</ul>
</p>
<script type="text/javascript">
var a3_3 = angular.module('a3_3', []);
a3_3.controller('c3_3', ['$scope', function ($scope) {
$scope.bold = "bold";
$scope.data = [
{name: "张明明", sex: "女", age: 24, score: 95},
{name: "李清思", sex: "女", age: 27, score: 87},
{name: "刘小华", sex: "男", age: 28, score: 86},
{name: "陈忠忠", sex: "男", age: 23, score: 97}
];
}]);
a3_3.filter('young', function () {
return function (e, type) {
var _out = [];
var _sex = type ? "男" : "女";
for (var i = 0; i < e.length; i++) {
if (e[i].age > 22 && e[i].age < 28 &&
e[i].sex == _sex)
_out.push(e[i]);
}
return _out;
}
});
</script>
</body>
</html>Example 5: Sort
<!doctype html>
<html ng-app="a3_4">
<head>
<title>表头排序</title>
<script src="../Script/angular.min.js"
type="text/javascript"></script>
<style type="text/css">
body {
font-size: 12px;
}
ul {
list-style-type: none;
width: 408px;
margin: 0px;
padding: 0px;
}
ul li {
float: left;
padding: 5px 0px;
}
ul .bold {
font-weight: bold;
cursor: pointer;
}
ul li span {
width: 52px;
float: left;
padding: 0px 10px;
}
ul .focus {
background-color: #cccccc;
}
</style>
</head>
<body>
<p ng-controller="c3_4">
<ul>
<li ng-class="{{bold}}">
<span>序号</span>
<span ng-click="title='name';desc=!desc">
姓名
</span>
<span ng-click="title='sex';desc=!desc">
性别
</span>
<span ng-click="title='age';desc=!desc">
年龄
</span>
<span ng-click="title='score';desc=!desc">
分数
</span>
</li>
<li ng-repeat=" stu in data | orderBy : title : desc">
<!--title：属性值，desc：升序or降序-->
<span>{{$index+1}}</span>
<span>{{stu.name}}</span>
<span>{{stu.sex}}</span>
<span>{{stu.age}}</span>
<span>{{stu.score}}</span>
</li>
</ul>
</p>
<script type="text/javascript">
var a3_4 = angular.module('a3_4', []);
a3_4.controller('c3_4', ['$scope', function ($scope) {
$scope.bold = "bold";
$scope.title = 'name';
$scope.desc = 0;
$scope.data = [
{name: "张明明", sex: "女", age: 24, score: 95},
{name: "李清思", sex: "女", age: 27, score: 87},
{name: "刘小华", sex: "男", age: 28, score: 86},
{name: "陈忠忠", sex: "男", age: 23, score: 97}
];
}])
</script>
</body>
</html>Example 6: Input filtering
<!doctype html>
<html ng-app="a3_5">
<head>
<title>字符查找</title>
<script src="../Script/angular.min.js"
type="text/javascript"></script>
<style type="text/css">
body {
font-size: 12px;
}
ul {
list-style-type: none;
width: 408px;
margin: 0px;
padding: 0px;
}
ul li {
float: left;
padding: 5px 0px;
}
ul .bold {
font-weight: bold;
cursor: pointer;
}
ul li span {
width: 52px;
float: left;
padding: 0px 10px;
}
ul .focus {
background-color: #cccccc;
}
</style>
</head>
<body>
<p ng-controller="c3_5">
<p>
<input id="txtkey" type="text"
ng-model="key" placeholder="请输入姓名关键字"/>
</p>
<ul>
<li ng-class="{{bold}}">
<span>序号</span>
<span>姓名</span>
<span>性别</span>
<span>年龄</span>
<span>分数</span>
</li>
<li ng-repeat=" stu in data | filter : {name:key}">
<span>{{$index+1}}</span>
<span>{{stu.name}}</span>
<span>{{stu.sex}}</span>
<span>{{stu.age}}</span>
<span>{{stu.score}}</span>
</li>
</ul>
</p>
<script type="text/javascript">
var a3_5 = angular.module('a3_5', []);
a3_5.controller('c3_5', ['$scope', function ($scope) {
$scope.bold = "bold";
$scope.key = '';
$scope.data = [
{name: "张明明", sex: "女", age: 24, score: 95},
{name: "李清思", sex: "女", age: 27, score: 87},
{name: "刘小华", sex: "男", age: 28, score: 86},
{name: "陈忠忠", sex: "男", age: 23, score: 97}
];
}])
</script>
</body>
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