This interactive map displays three highlighted countries—Poland, Ukraine, and Romania—as colored rectangular paths within an SVG container. Clicking a country updates a separate div to show its name, while hovering temporarily reduces the path’s opacity. The implementation uses plain JavaScript event listeners for click and mouseover/mouseout interactions, with a switch statement mapping country IDs to labels. The example demonstrates D3 version 6 setup but relies on native DOM APIs rather than d3 methods for interaction.