A new class of phenomena stemming from topological states of quantum matter has recently found a variety of analogies in classical systems 1,2,3,4,5,6,7,8,9,10 . Spin-locking and one-way propagation have been shown to drastically alter our view on scattering of electromagnetic waves, thus offering an unprecedented robustness to defects and disorder 11,12,13,14,15,16,17,18,19,20 . Despite these successes, bringing these new ideas to practical grounds meets a number of serious limitations. In photonics, when it is crucial to implement topological photonic devices on a chip 21 , two major challenges are associated with electromagnetic dissipation into heat and out-of-plane radiation into free space. Both these mechanisms may destroy the topological state and seriously affect the device performance. Here we experimentally demonstrate that the topological order for light can be implemented in all-dielectric on-chip prototype metasurfaces, which mitigate the effect of Ohmic losses by using exclusively dielectric materials, and reveal that coupling of the system to the radiative continuum does not affect the topological properties. Spin-Hall effect of light for spin-polarized topological edge states is revealed through near-field spectroscopy measurements.The experimental realization of photonic topological systems have demonstrated fascinating properties for their electromagnetic modes and opened avenues for their use in practical systems and devices 11,15,14,22,23,24,25,26,27 . Unfortunately, many of these original proposals have been based on metal containing metamaterials, 22,28,29,30,26 whose functionality cannot be extended into IR and visible domains. In this respect, all-dielectric topological structures based on arrays of ring resonators 14,31,32 or chiral waveguides 15,27,33 have demonstrated desirable properties at optical frequencies. Nonetheless, this comes at the cost of a very large footprint, with arrays of resonators that can be hundreds to thousands of wavelengths in size, rendering such systems rather unpractical. It is of practical relevance to realize topological systems not only made of photonic compatible materials, but also compact enough for integration with modern photonics circuitry. In this case one has to consider structures with characteristic length scales that are smaller 34 or comparable in size 35 with the wavelength of light. In this regard all-dielectric metamaterials and metasurfaces 36,37,38