This example demonstrates a panning interaction for a 28×28 grid of colored rectangles rendered as SVG, where the default d3.zoom wheel behavior is replaced with a custom wheel handler that calls `zoomer.translateBy` on a transition. The visualization shows how adding a transition to `translateBy` causes the grid to gradually zoom out instead of scrolling vertically as intended, contrasting with the default behavior without a transition. The code uses `d3.select`, `d3.range`, `d3.zoom`, `d3.interpolate`, and SVG rectangles with random fill colors, with the zoom transform applied directly to the rectangles.