This example displays a bar chart of the Titanic disaster dataset, with bars colored by survival status and gender, using D3.js v7 for data binding and SVG rendering. It shows the number of passengers per class and sex, with an interactive tooltip revealing exact values on hover. The page also includes a message container that reports the CSV file size, row count, and column count, demonstrating basic data loading and inspection. The code loads data from a GitHub-hosted CSV and uses `d3.csv` and `d3.select` for chart construction.