This example presents a multiple line chart that tracks sales quantity, total revenue, and total profit across four daily time periods (morning, noon, evening, late night). It uses React with D3 v4 to render an SVG visualization where each metric is drawn as a separate colored line. A hover interaction with an overlay rectangle and a vertical dashed line enables tooltips, displaying precise values for each data point at the cursor position. The chart uses d3.axisBottom and d3.axisLeft for scales, plus d3.bisect for date lookup, with data embedded directly in the JavaScript.