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Developer Dictionary

AJAX

Definition

Asynchronous JavaScript and XML; a technique for updating web pages without reloading.

Deep Dive

AJAX, or Asynchronous JavaScript and XML, is a set of web development techniques used on the client-side to create asynchronous web applications. It enables web pages to update content dynamically without requiring a full page reload, dramatically improving user experience and application responsiveness. Instead of sending an entire form and waiting for a new page to load, AJAX allows a web page to send and receive data from a server in the background, updating only specific parts of the page.

Examples & Use Cases

  • 1Live search suggestions appearing as you type in a search bar
  • 2Infinite scrolling on social media feeds like Facebook or Twitter
  • 3Submitting a "like" or "upvote" on a post without reloading the entire page

Related Terms

JavaScriptJSONSingle-Page Application (SPA)

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