This example shows an interactive water surface simulation rendered with WebGL on an HTML canvas. The visualization uses D3’s `select` to manage the container and a custom `viz` module that updates the scene on each render. The code initializes the WebGL context and draws a dynamic, undulating water effect, with state managed through a `setState` function to trigger re-renders. It relies on canvas-based WebGL rendering for fluid-like motion, with no external data source beyond the visual simulation itself.