AJAX is not defined by standards but by abusing standards

Morceaux choisis ...

AJAX as a platform is a set of technologies that was developed a long time ago for different purposes and is now evolving to accommodate new use cases. But right now it is a very fragile set of technologies.

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That said, it is the best deployment option available today and that's why Google has invested so heavily in AJAX.

Bret Taylor - Project Manager (Google : Ajax is about abusing standards)