This example demonstrates how modular JavaScript code can be assembled using ES6 imports and exports, alongside a direct integration of the D3.js library (v7). The visualization outputs a simple text string built from a constant defined in a separate module, while also logging the imported `select` function from D3 to the console. It contrasts an "old school approach" with a React-based starter template, highlighting different methods for structuring D3 projects. The code relies on D3's distribution from unpkg and does not render any graphical charts, serving only as a code-level illustration.