This example visualizes a time series of a single numeric value over approximately 90 daily data points, displaying both a filled area chart and an overlaid line with red circular markers. The chart uses a time-scaled x-axis and a linear y-axis, with axes rendered via `d3.axisBottom` and `d3.axisLeft`. It loads comma-separated data from a remote URL, parses dates with `d3.timeParse`, and builds the area and line paths using `d3.area` and `d3.line`. The visualization is rendered as SVG within a React-compatible setup using D3 v4.