gradual enhancement, graceful demotion

Progressive Enhancement Progressive Enhancement: build pages for low-version browsers to ensure
The most basic functions, and then for the advanced browser to effect, interaction and other improvements and append features to achieve better
User experience.

Graceful downgrade graceful degradation: Build the full functionality from the start, then for the lower version
Compatible with this browser.

The difference: Graceful demotion begins with a complex situation and attempts to reduce the supply of user experience, while progressive enhancement
Starts with a very basic, workable version and is continuously expanded to suit the needs of the future environment
To. Downgrading (function decay) means looking back, while progressive enhancement means looking forward, while ensuring its root
The base is in a safe zone.

Graceful downgrade

Graceful downgrade "The view is that the site should be designed for the most advanced and sophisticated browsers. and will those
Test work under a browser that is considered "outdated" or functionally missing is scheduled in the final stages of the development cycle, and
Limit the test object to the previous version of the main browser (IE, Mozilla, etc.).

In this design paradigm, older browsers are thought to provide only "rudimentary but poor
Passable) "browsing experience. You can make small adjustments to fit a particular browser. But
Since they are not the focus of our attention, apart from fixing larger errors, other differences will be
Directly ignored.



Progressive enhancement

The "progressive enhancement" view is that the focus should be on the content itself.
Content is the incentive for us to build our website. Some websites show it, others collect it, some seek it, some do it.
Other sites may even contain all of the above, but the same point is that they all involve content. This makes
"Progressive enhancement" has become a more reasonable design paradigm. It was also immediately adopted by Yahoo! and
Reasons for building its "tiered browser support (graded Browser supports)" policy
In.

gradual enhancement, graceful demotion