Welcome to D3JS
Three separate headings frame a red SVG square. Built with the D3.js v5 library, the visualization uses `d3.select` to target the SVG element and applies a red background via `svg.style`. The page combines vanilla HTML, an external stylesheet that resets margins, and JavaScript that also logs the D3 object to the console. This React-hosted example demonstrates D3’s DOM selection and styling methods within a minimal document structure.