What is progressive enhancement (progressive enhancement), graceful degradation (graceful degradation) it?
Progressive enhancement progressive enhancement:
It was constructed for low version of the browser page, to ensure the most basic functions, and then to effect, interactive and other improvements and additional features for advanced browser to achieve a better user experience.
Similarly climbing, climbing uphill out by a low
Graceful degradation graceful degradation:
Start to build fully functional, and then the low version compatible for browsers.
Similarly bungee jumping, go to the lower fall from height
Difference: progressive enhancement is upwardly compatible, graceful degradation is backward compatible.
Recommendation: now the Internet has developed rapidly, and even Microsoft have deserted ie browser in favor of such a high-edge version of the browser, in many cases we do not need another moment thinking about lower versions of the browser, but rather the beginning Construction of the full effect, according to the actual situation, repair the low version of the browser problem.