This example demonstrates a simple dynamic text list that simulates a shopping app interface. The visualization initially shows a single grocery item, “Milk” at $3, then updates after one second to add “Eggs” at $20, and finally corrects the egg price to $2 one second later. The prototype uses D3 v4 to render SVG text elements, with each item positioned vertically with fixed spacing. The `render` function leverages D3's selection API to append text nodes, setting font size, family, and alignment attributes. The data updates are triggered by JavaScript timers, though the code does not handle removal of old text elements.