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Jquery Ajax Progress Via Xhr

JQuery Ajax Progress via XHR

In the world of web development, if you are looking to level up your skills and create more dynamic and responsive web applications, mastering jQuery and Ajax can be a game-changer. And one function that can take your projects to the next level is monitoring the progress of Ajax requests via the XMLHttpRequest (XHR) object.

XHR is at the core of making asynchronous requests in JavaScript, and when combined with the power of jQuery, you can create seamless user experiences with progress indicators, helping users understand the status of their requests.

### How To Monitor Ajax Progress with jQuery and XHR

#### Step 1: Set Up Your HTML
First, make sure to include the latest jQuery library in your HTML file. You can either download it or use a CDN link. Create a button or trigger element that will initiate your Ajax request.

Html

<button id="requestButton">Make AJAX Request</button>
<div id="progressBar"></div>

#### Step 2: Initialize the Ajax Request
Next, you need to write the JavaScript code that handles the Ajax request. In this example, we are using the `$.ajax()` function provided by jQuery.

Javascript

$('#requestButton').on('click', function () {
  $.ajax({
    url: 'your_api_endpoint',
    type: 'GET',
    dataType: 'json',
    xhr: function () {
      var xhr = new window.XMLHttpRequest();
      xhr.upload.addEventListener('progress', function (evt) {
        if (evt.lengthComputable) {
          var percentComplete = (evt.loaded / evt.total) * 100;
          $('#progressBar').text(percentComplete + '%');
        }
      }, false);
      return xhr;
    },
    success: function (data) {
      // Handle successful response
    },
    error: function (xhr, status, error) {
      // Handle errors
    }
  });
});

#### Step 3: Monitoring Progress
By attaching an event listener to the XHR object with the `xhr.upload.addEventListener('progress')` function, you can track the progress of your Ajax request. Inside the listener, you can calculate the percentage of completion and update your progress bar element on the page.

#### Step 4: Responding to Success or Failure
Finally, don't forget to add callback functions for handling successful responses and errors. This ensures that your application can react appropriately based on the outcome of the Ajax request.

### Conclusion
Monitoring Ajax progress via XHR with jQuery is a powerful way to enhance user experience and provide feedback during long-running requests. By understanding how to use the XMLHttpRequest object and integrating it with jQuery's Ajax functions, you can create interactive applications that keep users engaged and informed.

Keep experimenting with different visual indicators, such as progress bars or spinners, to communicate the status of your Ajax requests visually. Learning how to leverage these tools effectively will undoubtedly elevate your web development skills and make your applications more polished and professional.

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