This example shows a minimal React application, displaying a basic “hello react!” message on the page. It uses React 16.9 and ReactDOM to render a simple functional component into the root DOM element, with D3 v5 loaded in the background. The visualization is static, rendered as SVG, though the active code only outputs text, while a commented-out block hints at potential SVG circles. All data and markup live inline in the JavaScript and HTML files, requiring a bundler to produce the final `bundle.js`.