Friday, 20 July 2018

AngularJS Directives

AngularJS extends HTML attributes with Directives, and binds data to HTML with Expressions.
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.

AngularJS Example:
<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<body>

<div ng-app="">

<p>Enter your Age:</p>
<p>Age: <input type="text" ng-model="ag"></p>
<p ng-bind="ag"></p>

</div>

</body>
</html>
Notes:
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 ag.
The ng-bind directive binds the content of the <p> element to the application variable ag.

Using Initialization
The ng-init directive initializes AngularJS application variables.

Example:
<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<body>

<div ng-app="" ng-init="age=25">

<p>The age is <span ng-bind="age"></span></p>
</div>
</body>
</html>
Output:
The age is 25

Note:
You can use data-ng-, instead of ng-, if you want to make your page HTML valid.

Example:
<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<body>
<div data-ng-app="" data-ng-init="age=25">
<p>The age is <span data-ng-bind="age"></span></p>
</div>
</body>
</html>
Output:
The age is 25


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