How To Use Ajax In Jquery?

By: Rajesh P.S.

Using AJAX (Asynchronous JavaScript and XML) in jQuery allows you to make asynchronous HTTP requests to a server, fetch data, and update your web page without having to reload the entire page. Here's a step-by-step explanation of how to use AJAX in jQuery with examples:

Include jQuery Library

First, make sure you have jQuery included in your HTML file. You can include it from a Content Delivery Network (CDN) like this:

Make an AJAX Request

To send an AJAX request, you can use the $.ajax() function or shorthand methods like $.get(), $.post(), $.getJSON(), etc. Here's an example using $.ajax() to make a GET request:

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$.ajax({ url: "https://jsonplaceholder.typicode.com/posts/1", // URL to the API method: "GET", // HTTP method (GET, POST, PUT, DELETE, etc.) dataType: "json", // Data type expected from the server (JSON in this case) success: function(data) { // Handle the successful response here console.log(data); }, error: function(xhr, status, error) { // Handle errors here console.error(error); } });

Handle the Response

In the example above, the success callback function is called when the AJAX request successfully retrieves data. You can access and manipulate the data returned by the server in this function.

Handle Errors

The error callback function is called if there's an issue with the AJAX request. You can handle errors, displaying appropriate messages to the user or taking corrective actions.

Send Data with POST Request

If you need to send data to the server, you can use a POST request. Here's an example using $.post():

$.post("https://jsonplaceholder.typicode.com/posts", { title: "New Post", body: "This is a new post.", userId: 1 }, function(data) { // Handle the response after posting data console.log(data); });

Working with JSON Data

If your server returns JSON data (common in web APIs), jQuery can automatically parse it. In the success callback, you can work with the JSON data as JavaScript objects.

Handling Asynchronous Nature

AJAX requests are asynchronous, meaning that JavaScript execution continues while the request is being made. You should use callbacks or Promises to handle the response data when it becomes available.

These are the fundamental steps to use AJAX in jQuery. You can adapt this approach to various use cases, such as loading content dynamically, submitting forms without page refresh, or interacting with web APIs.

Conclusion

To use AJAX in jQuery, you can make asynchronous HTTP requests to a server by utilizing functions like $.ajax() or shorthand methods such as $.get() or $.post(). You specify the URL, HTTP method, data type, and callback functions for success and error handling, allowing you to fetch data and update your web page dynamically without requiring a full page reload.

Next > How to multiple AJAX requests be run simultaneously in jQuery?

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