What is an AngularJS directive?
Directives are markers on a DOM element that tell AngularJS to attach a specified behavior to that DOM element or even transform the DOM element and its children. In short, it extends the HTML. Most of the directives in AngularJS are starting with ng- where ng stands for Angular.
What are the types of directives in AngularJS?
Types of Directives
- Attribute directives: Directive is active when matching attribute is found.
- Element directives: Directive is active when matching element is found.
- Component directives: Directive is active when matching component is found.
- CSS class directives: Directive is active when matching CSS style is found.
What is scope in AngularJS?
AngularJS Scope The scope is the binding part between the HTML (view) and the JavaScript (controller). The scope is an object with the available properties and methods. The scope is available for both the view and the controller.
What are the services in AngularJS?
Service in AngularJS is a function or an object that can be used to share data and the behaviour across the application (controller, directives, filters, other services etc.) or we can say services in AngularJS are objects that are wired together using DI (dependency injection) and it can be used to share and organize …
What are directives What are IT types?
Built-in directives
| Directive Types | Details |
|---|---|
| Components | Used with a template. This type of directive is the most common directive type. |
| Attribute directives | Change the appearance or behavior of an element, component, or another directive. |
| Structural directives | Change the DOM layout by adding and removing DOM elements. |
What is NG-model in AngularJS?
ngModel is a directive which binds input, select and textarea, and stores the required user value in a variable and we can use that variable whenever we require that value. It also is used during validations in a form. We can use ngModel with: input. text.
What are the directives in Angular?
Directives are classes that add additional behavior to elements in your Angular applications. Use Angular’s built-in directives to manage forms, lists, styles, and what users see. See the live example / download example for a working example containing the code snippets in this guide. Used with a template.
What are the built-in directives in angular?
AngularJS comes with a set of these directives built-in, like ngBind, ngModel, and ngClass. Much like you create controllers and services, you can create your own directives for AngularJS to use. When AngularJS bootstraps your application, the HTML compiler traverses the DOM matching directives against the DOM elements.
How to use ng-app directive in AngularJS?
The ng-app Directive in AngularJS is used to define the root element of an AngularJS application. This directive automatically initializes the AngularJS application on page load. It can be used to load various modules in AngularJS Application. Example: This example uses ng-app Directive to define a default AngularJS application.
How do you name a controller in an angular directive?
Use bindToController in Your Directives. One of the Angular best practices when writing directives is to use the controllerAs syntax. This syntax provides us a native namespacing in the controller. Just to remember, this change was introduced in Angular version 1.2.
What is the use of ng-init in angular?
The ng-init directive is used to initialize an AngularJS Application data. It defines the initial value for an AngularJS application and assigns values to the variables. The ng-init directive defines initial values and variables for an AngularJS application. Example: In this example, we initialize an array of string.