This example shows a stacked bar chart comparing three value series across three categories, with each bar segment stacked vertically and colored blue, green, or orange. The chart renders as an SVG using React and D3 v6, drawing rectangles positioned via a band scale for categories and a linear scale for cumulative sums. The code calls `d3.stack()` with keys for value1, value2, and value3, and appends axes with `d3.axisBottom` and `d3.axisLeft`. The dataset is hardcoded in the script.