Development.
Graceful Degradation.

When a site utilizes new technology, if disabled, the content maintains effectiveness for the users.

AboutAuthorDate
Graceful DegradationZurbJuly 5th, 2019
What Is 'Graceful Degradation' in Web Design?LifewireJune 24th, 2019
What is Graceful Degradation?TechTargetMarch 1st, 2007
Graceful Degradation of Scalable Internet ServicesNielsen Norman GroupOctober 31st, 1999