This bootstrap option is used primarily for servers-side rendering using an
Experiment server SDK. This bootstrap option always prefers the config
initialVariants
over data in local storage, even if variants are fetched
successfully and stored locally.
The default way to source variants within your application. Before the
assignments are fetched, getVariant(s)
will fallback to local storage
first, then initialVariants
if local storage is empty. This option
effectively falls back to an assignment fetched previously.
Determines the primary source of variants before falling back.