Try to compile to js library ,but show error info that 'haxe.io.BytesData has not field length'

[XESDog]

polygonal/ds/tools/mem/ShortMemory.hx:141: characters 9-15 : haxe.io.BytesData has no field length
polygonal/ds/tools/mem/BitMemory.hx:144: characters 9-15 : haxe.io.BytesData has no field length
polygonal/ds/tools/mem/DoubleMemory.hx:140: characters 9-15 : haxe.io.BytesData has no field length
polygonal/ds/tools/mem/IntMemory.hx:237: characters 9-15 : haxe.io.BytesData has no field length
polygonal/ds/tools/mem/FloatMemory.hx:138: characters 9-15 : haxe.io.BytesData has no field length

I look up some info in haxe git websit , the question has always exsit since 2015 , how can i do ?