Hijax

A web development approach coined by Jeremy Keith that applies progressive enhancement principles to Ajax applications. Hijax starts with a fully functional, accessible HTML page and then layers Ajax functionality on top, so that the site degrades gracefully when JavaScript is unavailable or when assistive technologies cannot process dynamic content. This contrasts with building Ajax-first applications that fail entirely without JavaScript. The approach was proposed as a solution to the accessibility barriers created by Web 2.0's heavy reliance on JavaScript-driven dynamic content.