This example demonstrates a dynamic bar chart that updates every 1.5 seconds by shifting data and appending a random value, with the bars resizing to reflect the new array length. It uses the D3.js v5 library with the enter, update, and exit selection pattern to manage the bar elements. The code calls `d3.select` to bind data to `div` elements, sets their width via the `style` method, and updates text labels through `select("span")`. The animation uses `setInterval` to trigger the `render` function repeatedly.