Draw using the currently bound element array buffer. The given offset is in bytes, and must be a valid multiple of the size of the given type or an INVALID_OPERATION error will be generated; in addition the offset must be non-negative or an INVALID_VALUE error will be generated; see Buffer Offset and Stride Requirements. If count is greater than zero, then a non-null WebGLBuffer must be bound to the ELEMENT_ARRAY_BUFFER binding point or an INVALID_OPERATION error will be generated.