```This code includes the jQuery library from the Google CDN (Content Delivery Network). You can also download the jQuery library and include it from your local file system." } },{"@type": "Question","name": "4. What is the purpose of the $.ajax() function in jQuery? ","text": "4. What is the purpose of the $.ajax() function in jQuery? ","acceptedAnswer":{ "@type": "Answer","text":"Ans. The $.ajax() function in jQuery is used to perform asynchronous HTTP requests. It allows you to send and retrieve data from a server without reloading the entire page. You can specify various parameters such as the URL, request method, data to send, and success/error handlers." } },{"@type": "Question","name": "5. How can I retrieve data from a server using AJAX in jQuery? ","text": "5. How can I retrieve data from a server using AJAX in jQuery? ","acceptedAnswer":{ "@type": "Answer","text":"Ans. To retrieve data from a server using AJAX in jQuery, you can use the $.ajax() function with the appropriate parameters. Here's an example:```$.ajax({ url: 'example.com/data', method: 'GET', success: function(response) { // Handle the retrieved data here console.log(response); }, error: function(xhr, status, error) { // Handle errors here console.log(error); }});```In this example, the URL 'example.com/data' is requested using the GET method. The response from the server is handled in the success callback function, and any errors are handled in the error callback function." } }]},{"@context":"http://schema.org", "@type":"Quiz","name" : "Quiz about jQuery and AJAX Tutorials 12 | Adding the Username Video Lecture | AJAX and jQuery: Complete Series for Beginners - Front-End Programming","about": {"@type": "Thing","name": "jQuery and AJAX Tutorials 12 | Adding the Username Video Lecture | AJAX and jQuery: Complete Series for Beginners - Front-End Programming"},"educationalAlignment": {"@type": "AlignmentObject","alignmentType": "educationalSubject","targetName": "Front-End Programming","targetUrl": "https://edurev.in/v/108754/jQuery-and-AJAX-Tutorials-12--Adding-the-Username"},"assesses": "Attempt this quiz and test your knowledge" }]
FAQs on jQuery and AJAX Tutorials 12 - Adding the Username Video Lecture - AJAX and jQuery: Complete Series for Beginners - Front-End Programming
1. What is jQuery?
Ans. jQuery is a fast, small, and feature-rich JavaScript library that simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development.
2. What is AJAX?
Ans. AJAX stands for Asynchronous JavaScript and XML. It is a set of web development techniques used to create asynchronous web applications. AJAX allows data to be sent and retrieved from a server without interfering with the display and behavior of the existing page.
3. How can I include jQuery in my HTML document?
Ans. To include jQuery in your HTML document, you can use the following code snippet:
```
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
```
This code includes the jQuery library from the Google CDN (Content Delivery Network). You can also download the jQuery library and include it from your local file system.
4. What is the purpose of the $.ajax() function in jQuery?
Ans. The $.ajax() function in jQuery is used to perform asynchronous HTTP requests. It allows you to send and retrieve data from a server without reloading the entire page. You can specify various parameters such as the URL, request method, data to send, and success/error handlers.
5. How can I retrieve data from a server using AJAX in jQuery?
Ans. To retrieve data from a server using AJAX in jQuery, you can use the $.ajax() function with the appropriate parameters. Here's an example:
```
$.ajax({
url: 'example.com/data',
method: 'GET',
success: function(response) {
// Handle the retrieved data here
console.log(response);
},
error: function(xhr, status, error) {
// Handle errors here
console.log(error);
}
});
```
In this example, the URL 'example.com/data' is requested using the GET method. The response from the server is handled in the success callback function, and any errors are handled in the error callback function.