The TimeRanges interface is used to represent a set of time ranges, primarily for the purpose of tracking which portions of media have been buffered when loading it for use by the <audio> and <video> elements.
A TimeRanges object includes one or more ranges of time, each specified by a starting and ending time offset. You reference each time range by using the start() and end() methods, passing the index number of the time range you want to retrieve.
Documentation for this class was provided by MDN. var length(default,null) : IntThe number of time ranges represented by the time range object. Read only. function end( index : Int ) : Float function start( index : Int ) : Float