This example displays a basic “Hello World” message on an HTML page, built with React and rendered through a simple `index.html` and `index.js` structure. The page sets a large font size via CSS and outputs the text inside a `<pre>` element. The JavaScript code updates the element’s text content using the DOM API `document.getElementById`, and also logs a message to the browser’s console. No data source or visualization library is used; it serves as a minimal React starter template.