This bar chart visualizes the daily confirmed COVID-19 cases across eight countries from January to May 2020. The current configuration displays the US case count on the x-axis and dates on the y-axis, with each bar’s length representing the cumulative total. The code uses D3 v5 APIs including `csv`, `scaleLinear`, `scaleBand`, `axisLeft`, and `axisBottom` to load data from a CSV file and render the SVG, with configurable axis labels and grid lines.