A nearly blank SVG canvas displays only a single, small, commented-out text element, leaving the visualization empty. The page sets up a 960-by-500-pixel SVG container using D3 v4, appending it directly to the body with no active data binding, scales, or shapes. The code includes no data source or rendering logic beyond the empty `svg` element and a disabled text label, so the example shows a minimal starting point for a block rather than a completed chart. It relies solely on `d3.select` and `svg.append`.