[en] We propose an electrically programmable nonvolatile metasurface working at near-IR frequency (λ = 1550 nm) based on ITO/Ge₂Sb₂Te₅-ITO/Au crossbar structure. The proposed metasurface can dynamically change its optical function by modulating the crystallization level of Ge₂Sb₂Te₅, which is a phase change material, at each pixel position individually by controlled electrical pulses. We design and optimize the metasurface by using finite-difference time-domain simulations and numerically demonstrate various optical functions including beam steering devices, flat lenses, optical vortex generators, and metasurface holograms with a single device geometry. (paper)