"Graceful fallback" is what came before progressive enhancement, and is considered obsoleted for good reason.
Graceful fallbacks tend to be maintained as a separate version, and neglected over time. Progressive enhancement means taking a basic page and adding snazzy functionality to it - eg. ajaxified page loads. The latter is what you want.
Graceful fallbacks tend to be maintained as a separate version, and neglected over time. Progressive enhancement means taking a basic page and adding snazzy functionality to it - eg. ajaxified page loads. The latter is what you want.