This interactive Sankey diagram uses the D3.js library to visualize the flow of data through a Swagger-defined Pet Store API. The graph maps requests from API resources and parameters, such as `petId` and `upload file`, through to endpoints like `/pet/{petId}`. Nodes and links are colored and sized according to their connection values. The visualization supports drag-and-drop repositioning of nodes, with a `relayout()` function updating the curved link paths and a yellow stroke applied to all connections. The underlying data is loaded from a JSON file.