Node.js making a typed array from a Buffer -

for ws library, correct (or @ least functioning) way send binary data so:

var array = new float32array(size); ws.send(new buffer(array)); 

i see, in node docs:

new uint32array(new buffer([1,2,3,4]))  

so little confused. why 1 want make new buffer out of typed array , send vs why want make new typed array buffer?

can typed arrays alone sent via websockets? failed in tests doing wrong...