This example presents a multi-series line chart tracking Apple stock prices, showing open, close, and high values over time, alongside a combined bar-line chart where bars represent open prices and a line tracks closing prices. It uses the D3.js library (v7) to load CSV data from a Plotly dataset, parse dates with time scales, and render charts as SVG elements. The implementation features gridlines, legends, axis labels, and scales generated through d3.scaleTime, d3.scaleLinear, d3.scaleBand, and d3.line.