what kind of bond is water ionic or covalent
Water is about 33% ionic. Linus Pauling discusses the ionic character of water in his famous The Nature of the Chemical Bond at pages 100-101. Pauling says as a first approximation water should be considered as having contributions from four resonance structures: 37% $\ce{H-O-H}$. 24% $\ce{(H-O)- ~H+}$. 24% $\ce{H+ ~(O-H)-}$.