Short video - AJAX (Asynchronous Javascript and XML)

10 Sept 2022 · 1 min
0:58

The speaker explains that traditional multi‑page websites reload the entire page—including shared elements like navigation menus and banners—each time a user navigates, which wastes bandwidth. While browsers can cache resources and developers can use iframes to keep common parts static, both approaches have drawbacks: caching cannot eliminate all redundant transfers and iframes hinder SEO and indexing. The speaker introduces AJAX (Asynchronous JavaScript and XML) as the preferred solution, allowing only the new data to be fetched and inserted asynchronously, preserving shared components, reducing bandwidth usage, and improving user experience without the SEO drawbacks of iframes.

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