Making a bar chart
This example demonstrates how to create a simple bar chart using D3.js version 6. The chart is rendered within an HTML page that imports the D3 library and loads the visualization from an external JavaScript file. The visualization uses the `d3.select` API to access and manipulate the SVG elements, while the page’s styling is handled through CSS. The data and specific bar dimensions are not defined in the provided code, leaving the chart’s content to be generated dynamically by the script.