Yes, we can have nested controllers in AngularJS.
Yes, we can have nested controllers in AngularJS.
The auto-bootstrap process in AngularJS refers to the automatic initialization of an AngularJS application when the browser loads the HTML page. It involves scanning the DOM for the `ng-app` directive, which marks the root element of the application, and then AngularJS automatically compiles the HTML and links it with the application's scope and controllers.
Data binding in AngularJS is the synchronization between the model and the view. There are two types of data binding directives provided by AngularJS: one-way data binding and two-way data binding.
A directive in AngularJS is a special marker on a DOM element (such as an attribute, element name, or class) that tells AngularJS to attach a specified behavior to that element or to transform the DOM element and its children. Directives are used to create custom HTML elements and attributes, enhance existing elements, and encapsulate reusable components.
The key difference between Angular expressions and JavaScript expressions is that Angular expressions can bind data to the HTML and are evaluated within the Angular context, allowing for two-way data binding, while JavaScript expressions are evaluated in the JavaScript context and do not have access to Angular's scope or data binding features.
In AngularJS, data binding can be demonstrated using the `ng-model` directive. For example:
```html
<div ng-app="myApp" ng-controller="myCtrl">
<input type="text" ng-model="name">
<p>Hello, {{name}}!</p>
</div>
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.name = 'World';
});
</script>
```
In this example, when the user types in the input field, the displayed greeting updates automatically to reflect the input.
To display values in tables in AngularJS, you can use the `ng-repeat` directive to iterate over an array of objects. Here’s an example:
```html
<table>
<tr>
<th>Name</th>
<th>Age</th>
</tr>
<tr ng-repeat="person in people">
<td>{{ person.name }}</td>
<td>{{ person.age }}</td>
</tr>
</table>
```
In this example, `people` is an array in your AngularJS controller containing objects with `name` and `age` properties.
The manual bootstrap process in AngularJS involves initializing an AngularJS application manually instead of using the automatic bootstrapping provided by the framework. This is done by using the `angular.bootstrap()` method, where you specify the DOM element to bootstrap and the AngularJS module to use. This allows for more control over the initialization process, especially in scenarios where you need to integrate AngularJS with other libraries or frameworks.
Bootstrapping in AngularJS refers to the process of initializing and loading the AngularJS application. It involves compiling the HTML templates and linking them with the AngularJS scope, allowing the application to start running and respond to user interactions.
AngularJS can be bootstrapped in the following ways:
1. **Automatic Bootstrapping**: By including the AngularJS script in the HTML file and using the `ng-app` directive to define the root element of the application.
2. **Manual Bootstrapping**: By using the `angular.bootstrap()` method in JavaScript to manually start the application, allowing for more control over the bootstrapping process.
Angular Expression is a way to bind data to the HTML in AngularJS applications. It allows you to evaluate JavaScript expressions within the HTML, enabling dynamic content updates based on the application's data model.
The components that can be used in AngularJS modules include:
1. Controllers
2. Services
3. Directives
4. Filters
5. Constants
6. Values
7. Providers
8. Configurations
9. Run blocks
One-way binding allows data to flow in one direction, from the model to the view, meaning changes in the model update the view but not vice versa. Two-way binding allows data to flow in both directions, so changes in the model update the view and changes in the view update the model.
AngularJS features include:
1. **Two-way Data Binding**: Synchronizes data between the model and the view automatically.
2. **Dependency Injection**: Manages dependencies efficiently, making code modular and easier to test.
3. **Directives**: Allows the creation of custom HTML elements and attributes to extend HTML functionality.
4. **MVC Architecture**: Follows the Model-View-Controller design pattern for better separation of concerns.
5. **Templates**: Uses HTML templates that are processed by the AngularJS framework to produce dynamic views.
6. **Filters**: Enables formatting of data displayed to the user without changing the underlying data.
7. **Routing**: Provides a way to navigate between different views or states in a single-page application.
8. **Services**: Reusable components that provide specific functionality, promoting code reuse.
9. **Testing**: Built-in support for unit testing and end-to-end testing.
10. **Modularity**: Encourages the use
No, AngularJS is not the same as jQuery. AngularJS is a framework for building web applications, while jQuery is a library for simplifying HTML document traversing, event handling, and animation.
No, Angular does not use the jQuery library by default.
Angular works with modern browsers such as Google Chrome, Mozilla Firefox, Safari, Microsoft Edge, and Opera. It also supports Internet Explorer 11 with some limitations.
In AngularJS, a scope is an object that refers to the application model. It acts as a bridge between the controller and the view, allowing data binding and communication between them.
The key features/concepts of Angular.js include:
1. **Two-way Data Binding**: Automatically synchronizes data between the model and the view.
2. **MVC Architecture**: Follows the Model-View-Controller design pattern for better separation of concerns.
3. **Directives**: Custom HTML attributes that extend HTML with new behavior.
4. **Dependency Injection**: Simplifies the development and testing of applications by managing dependencies.
5. **Modules**: Organizes the application into cohesive blocks of functionality.
6. **Services**: Reusable components that provide specific functionality, such as data fetching.
7. **Filters**: Format data displayed to the user in the view.
8. **Routing**: Enables navigation between different views or components in a single-page application.
9. **Templates**: HTML with embedded Angular directives that define the user interface.
10. **Testing**: Built-in support for unit testing and end-to-end testing.
No, AngularJS does not have a dependency on jQuery.
The AngularJS category on takluu.com is crafted for frontend developers and aspirants preparing for interviews involving the AngularJS framework. AngularJS, developed by Google, is a popular JavaScript-based open-source framework that helps build dynamic single-page applications (SPAs) with ease.
This section covers essential AngularJS topics such as two-way data binding, directives, controllers, scopes, services, dependency injection, and routing. It also dives into the framework’s architecture and how it simplifies complex frontend development tasks.
Interview questions often focus on practical usage and understanding of AngularJS features, including:
-
“What are directives and how are they used?”
-
“Explain the concept of two-way data binding.”
-
“How does dependency injection work in AngularJS?”
Our content includes clear explanations, code snippets, and real-world examples to help you grasp AngularJS concepts effectively. Whether you’re a beginner or an experienced developer, this category prepares you for both basic and advanced technical questions.
At Takluu, we keep this category updated with best practices and the latest trends in AngularJS development to ensure you’re ready to excel in your interviews and projects.