Before AJAX, web applications relied on full page reloads to update content on the page. For example, when a user submitted a form, the entire page would reload, including the header, footer, and other content that didn’t need to change. This was a slow and inefficient way to update web pages, especially for applications that required frequent updates.
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How does AJAX work?
XMLHttpRequest (XHR) object
The server is responsible for processing the requests made by the XHR object and returning a response. When the server receives a request, it processes the request and returns the requested data in a format such as XML, JSON, or plain text.
Here’s a step-by-step breakdown of how AJAX works:
- User interacts with the web page
The user interacts with the web page by clicking a button, entering text into a form, or performing any other action that requires a request to the server.
- Server processes the request
The server receives the request, processes the request, and returns a response. The response can be in the form of XML, JSON, or plain text.
- Web page updates dynamically
The web page updates dynamically, without requiring a full page reload. The user can continue to interact with the page without any interruption.
Benefits of AJAX
- Improved user experience
The most significant benefit of AJAX is that it provides a better user experience. With AJAX, web pages can update specific sections of a page asynchronously, resulting in faster and more responsive web applications. This can lead to increased user engagement and satisfaction.
- Reduced server load
Because AJAX only retrieves and updates the necessary data, it can reduce the load on the server. This can lead to faster response times, reduced server load, and improved scalability.
- Better SEO
With AJAX, web developers can create web applications that can be crawled by