Home >Web Front-end >JS Tutorial >Detailed explanation of using filters in AngularJS_AngularJS

Detailed explanation of using filters in AngularJS_AngularJS

WBOYOriginal: 2016-05-16 15:54:381173browse

Filters are used to modify data and can be included in expressions or using pipe directives. Below is a list of commonly used filters.

2015616121340418.jpg (540×292)

Lower case filter

Add lowercase filter, using pipe expression. Add lowercase filter here to print student names in lowercase letters.

Enter first name:<input type="text" ng-model="student.firstName">
Enter last name: <input type="text" ng-model="student.lastName">
Name in Upper Case: {{student.fullName() | lowercase}}

Currency Filter

The Canadian dollar filter uses the pipe character to return a number expression. Here we have added the filter Currency to print the charges using Currency format.

Enter fees: <input type="text" ng-model="student.fees">
fees: {{student.fees | currency}}

Filter of filters

To show only the required subjects we use subjectName as filter.

Enter subject: <input type="text" ng-model="subjectName">
Subject:
<ul>
 <li ng-repeat="subject in student.subjects | filter: subjectName">
  {{ subject.name + ', marks:' + subject.marks }}
 </li>
</ul>

Sort Filter

To order topics by tag, we use orderBy tag.

Subject:
<ul>
 <li ng-repeat="subject in student.subjects | orderBy:'marks'">
  {{ subject.name + ', marks:' + subject.marks }}
 </li>
</ul>

Example

The following example will demonstrate all the above filters.
testAngularJS.html

<html>
<head>
<title>Angular JS Filters</title>
</head>
<body>
<h2>AngularJS Sample Application</h2>
<div ng-app="" ng-controller="studentController">
<table border="0">
<tr><td>Enter first name:</td><td><input type="text" ng-model="student.firstName"></td></tr>
<tr><td>Enter last name: </td><td><input type="text" ng-model="student.lastName"></td></tr>
<tr><td>Enter fees: </td><td><input type="text" ng-model="student.fees"></td></tr>
<tr><td>Enter subject: </td><td><input type="text" ng-model="subjectName"></td></tr>
</table>
<br/>
<table border="0">
<tr><td>Name in Upper Case: </td><td>{{student.fullName() | uppercase}}</td></tr>
<tr><td>Name in Lower Case: </td><td>{{student.fullName() | lowercase}}</td></tr>
<tr><td>fees: </td><td>{{student.fees | currency}}</td></tr>
<tr><td>Subject:</td><td>
<ul>
  <li ng-repeat="subject in student.subjects | filter: subjectName |orderBy:'marks'">
   {{ subject.name + ', marks:' + subject.marks }}
  </li>
</ul>
</td></tr>
</table>
</div>
<script>
function studentController($scope) {
  $scope.student = {
   firstName: "Mahesh",
   lastName: "Parashar",
   fees:500,
   subjects:[
     {name:'Physics',marks:70},
     {name:'Chemistry',marks:80},
     {name:'Math',marks:65}
   ],
   fullName: function() {
     var studentObject;
     studentObject = $scope.student;
     return studentObject.firstName + " " + studentObject.lastName;
   }
  };
}
</script>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.min.js"></script>
</body>
</html>

Output

Open textAngularJS.html in a web browser and see the following results:

2015616121404523.png (688×433)

Statement：

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Previous article：How to implement video screenshots in js HTML5_javascript skillsNext article：How to implement video screenshots in js HTML5_javascript skills

See more

Detailed explanation of using filters in AngularJS_AngularJS

Related articles