Ahmad's first Test
This example displays a large “Hello, World!” message as the centerpiece of a minimal React and D3 visualization. The page renders the text inside an `h2` element using D3’s `select` and `append` methods, pulling the string from a custom `Handle` class defined in a separate module. The `Handle` constructor initializes x and y coordinates and provides a `draw` method returning the message. Styled with a 13em font size and centered via CSS, the visualization demonstrates basic integration of D3 selection with a React-based file structure, relying on d3.v5 for DOM manipulation.