This functionality is Sneak Peek status. This means that the APIs may change. We welcome your feedback, ideas, and code, but please use caution if you use this new functionality.
This is still a rough draft.
||(Object) A list of the browser features to check for (see below for more information about the structure of this object)|
|Object||The type tag of the first feature that is found in the options|
In this example, description here...