Angular js

AngularJS Introduction
• AngularJS is a JavaScript framework. It can be added to an HTML page with a
<script> tag.
• AngularJS extends HTML attributes with Directives, and binds data to HTML with
Expressions.
• AngularJS is a JavaScript framework. It is a library written in JavaScript.
• AngularJS is distributed as a JavaScript file, and can be added to a web page with a
script tag:
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js">
</script> infobizzs.com

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AngularJS Extends HTML
• AngularJS extends HTML with ng-directives.
• The ng-app directive defines an AngularJS application.
• The ng-model directive binds the value of HTML controls (input, select, textarea) to
application data.
• The ng-bind directive binds application data to the HTML view.

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AngularJS Example
<!DOCTYPE html>
<html>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
<body>
<div ng-app="">
<p>Name: <input type="text" ng-model="name"></p>
<p ng-bind="name"></p>
</div>
</body>
</html>

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Example explained:
• AngularJS starts automatically when the web page has loaded.
• The ng-app directive tells AngularJS that the <div> element is the "owner" of an
AngularJS application.
• The ng-model directive binds the value of the input field to the application variable
name.
• The ng-bind directive binds the innerHTML of the <p> element to the application
variable name.

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AngularJS Directives
• As you have already seen, AngularJS directives are HTML attributes with an ng prefix.
• The ng-init directive initialize AngularJS application variables.
AngularJS Example
<div ng-app="" ng-init="firstName='John'">
<p>The name is <span ng-bind="firstName"></span></p>
</div>

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AngularJS Expressions
• AngularJS expressions are written inside double braces: {{ expression }}.
• AngularJS will "output" data exactly where the expression is written:
AngularJS Example
<!DOCTYPE html>
<html>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
<body>
<div ng-app="">
<p>My first expression: {{ 5 + 5 }}</p>
</div>
</body>
</html>

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AngularJS Applications
• AngularJS modules define AngularJS applications.
• AngularJS controllers control AngularJS applications.
• The ng-app directive defines the application, the ng-controller directive defines the controller.
AngularJS Example
<div ng-app="myApp" ng-controller="myCtrl">
First Name: <input type="text" ng-model="firstName"><br>
Last Name: <input type="text" ng-model="lastName"><br>
<br>
Full Name: {{firstName + " " + lastName}}
</div>

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Continue…..
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.firstName= "John";
$scope.lastName= "Doe";
});
</script>

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• AngularJS modules define applications:
• AngularJS controllers control applications:
app.controller('myCtrl', function($scope)
{
$scope.firstName= "John";
$scope.lastName= "Doe";
});

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AngularJS Numbers
• AngularJS numbers are like JavaScript numbers:
AngularJS Example
<div ng-app="" ng-init="quantity=1;cost=5">
<p>Total in dollar: {{ quantity * cost }}</p>
</div>
Output

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AngularJS Strings
• AngularJS strings are like JavaScript strings:
AngularJS Example
<div ng-app="" ng-init="firstName='John';lastName='Doe'">
<p>The name is {{ firstName + " " + lastName }}</p>
</div>
Output

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AngularJS Objects
• AngularJS objects are like JavaScript objects:
AngularJS Example
<div ng-app="" ng-init="person={firstName:'John',lastName:'Doe'}">
<p>The name is {{ person.lastName }}</p>
</div>
Output

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AngularJS Arrays
• AngularJS arrays are like JavaScript arrays:
AngularJS Example
<div ng-app="" ng-init="points=[1,15,19,2,40]">
<p>The third result is {{ points[2] }}</p>
</div>
Output

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AngularJS Tables
• The ng-repeat directive is perfect for displaying tables.
Displaying Data in a Table
• Displaying tables with angular is very simple:
AngularJS Example
<div ng-app="myApp" ng-controller="customersCtrl">
<table>
<tr ng-repeat="x in names">
<td>{{ x.Name }}</td>
<td>{{ x.Country }}</td>
</tr>
</table>
</div>

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<script>
app.controller('customersCtrl', function($scope, $http) {
$http.get("http://www.w3schools.com/angular/customers.php")
.success(function (response) {$scope.names = response.records;});
});
</script>
Output

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Displaying with CSS Style
• To make it nice, add some CSS to the page:
CSS Style
<style>
table, th , td {
border: 1px solid grey;
border-collapse: collapse;
padding: 5px;
}
table tr:nth-child(odd) {
background-color: #f1f1f1;
}
table tr:nth-child(even) {
background-color: #ffffff;
}
</style>

Angular js

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