[Attribute Name] readyState HAVE_NOTHING, HAVE_ENOUGH_DATA [Additional considerations] A MediaStream may be created before there is any data available, for example when a stream is received from a remote peer. The value of the readyState of the media element MUST be HAVE_NOTHING before the first media arrives and HAVE_ENOUGH_DATA once the first media has arrived. [Attribute Type] 
unsigned short
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