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Start With AngularJS: Part Four

Before reading this article, I highly recommend reading the previous parts of the series.

Data Binding

AngularJS provides one-way & two-way data binding to handle the synchronization of data between model and view.

One-way data binding

It was introduced in AngularJS 1.3 and uses a double colon (::), for binding data i.e. binding data from Model to View.

One-way data binding

Two-way data binding

It is used to synchronize the data between the model and the view. It means any change in the model will update the view and vice versa. Ng-model directive is used for two-way data binding.

Two way data binding

  1. Open an old visual studio project.
  2. Add a new HTML file with name data binding.
    HTML

Complete code for one-way & two-way data binding here.

<!DOCTYPE html>
<html>
<head>
    <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.3.2/angular.min.js"></script>
    <meta charset="utf-8">
    <title>AngularJS Data Binding : Web Geek School</title>
</head>
<body ng-app="app">
    <div ng-controller="Ctrl">
        <h2>AngularJS Data Binding</h2>
        <p>Name (two-way binding):
            <input type="text" ng-model="name" />
        </p>
        <i>Change the Textbox value to see changes</i>
        <p>Your name (one-way binding): {{::name}}</p>
        <p>Your name (normal binding): {{name}}</p>
    </div>
    <script>
        var app = angular.module('app', []);
        app.controller("Ctrl", function($scope) {
            $scope.name = "Shiva shukla"
        })
    </script>
</body>
</html>

Output

Binding

Template

Templates are a combination of HTML elements, directives, filters, attributes, and expressions.

  1. Open an old visual studio project
  2. Add a new html file with the name Template.
    Template
<!DOCTYPE html>
<html>
<head>
    <title>Demo</title>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
    <script>
        var members = [
            {
                username: 'Shiva',
                address: 'Delhi'
            },
            {
                username: 'Rahul',
                address: 'Mumbai'
            },
            {
                username: 'Kshma',
                address: 'Mumbai'
            },
            {
                username: 'Ashita',
                address: 'Varanasi'
            }
        ];
        var app = angular.module('app', []);
        app.controller('MemberController', function($scope) {
            $scope.Members = members;
        });
    </script>
</head>
<body ng-app="app">
    <p>AngularJS basic template</p>
    <h4>Listing item from the collection</h4>

    <div ng-controller="MemberController">
        <ul>
            <li ng-repeat="member in Members">
                {{$index + 1}}. Name: {{member.username }} | Address: {{ member.address}}
            </li>
        </ul>
    </div>
</body>
</html>

Output

Output

  • Note: {{$index + 1}} is used for indexing & numbering.
  • Ng-Reapet: To list data from the array, we shall use the ng-repeat directive.


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