This example renders a minimal modular D3 chart using a pre-defined dataset of five axis-value pairs. The code initializes a linear scale with `d3.scaleLinear` and appends a radar chart group to an SVG, though the visualization itself is incomplete. A separate `module.js` file exports a reusable D3 module that appends a text element, with a setter method `my.val1` to control the displayed value. The HTML page loads D3 v7 from unpkg and uses a bundled `bundle.js` file to run the JavaScript.