This visualization displays population by country as a horizontal bar chart, with countries sorted by population. Built with Vega-Lite’s API and rendered via D3, it loads data from a CSV of 2015 population figures. The chart uses a dark theme, custom axis styling, and tooltips showing exact values. The code registers Vega-Lite with a tooltip handler and fits the chart to the window size using an autosize configuration. The design improves readability with larger fonts and muted colors, while the interactive tooltip provides detailed population numbers on hover.