This example shows a static SVG legend that maps categorical data labels to distinct colors using a JavaScript `Map` object. It renders ten entries, each pairing a colored circle with a text label, to document color assignments for COVID-19 related event types. The code uses D3 v7’s `select` and `append` methods to add circles and text elements to an existing SVG container, positioning them with hardcoded `cx`, `cy`, and `x`, `y` attributes. Styling is applied inline via `.style()` calls, with font size and alignment set for readability.