Optional
lowerOpen: booleanOptional
upperOpen: booleanThe lowerBound()
static method of the By default, it includes the lower endpoint value and is closed.
Optional
open: booleanThe only()
static method of the IDBKeyRange interface creates a new key range containing a single value.
The upperBound()
static method of the it includes the upper endpoint value and is closed.
Optional
open: boolean
The
bound()
static method of the IDBKeyRange interface creates a new key range with the specified upper and lower bounds.MDN Reference