HSlayers-NG is a modular, open-source web GIS frontend library built with Angular and OpenLayers. It provides customizable map viewer components, tools for spatial data interaction, and integration with services like WMS, WMTS, WFS, and sensor platforms like SensLog. HSlayers-NG is particularly useful for developing interactive web-based environmental, agricultural, or spatial monitoring applications, offering extensible UI elements, 3D Cesium support, and Vega-based chart visualizations. The platform is well-suited for building tailored, spatial data dashboards.