This bar chart visualizes weekly sales data from a CSV file, with each bar representing an ID and its corresponding sales figure, and includes interactive tooltips that display the sales value on hover. The visualization uses D3 v7 and is built with an SVG canvas. It employs `d3.csv` to load the data, `scaleLinear` for the x-axis, `scaleBand` for the y-axis, and `axisLeft` and `axisBottom` to render the axes. Bars change color on mouseover via a custom tooltip implemented with D3 selections.