csv test
This example loads a CSV file containing time-series data of water depth measurements and outputs the parsed result to the browser console. Using the D3.js library (v7) via JavaScript’s `d3.csv` method, it fetches and parses the data from `D.csv`. The visualization itself does not render any graphical elements; instead, it demonstrates the fundamental step of loading and accessing tabular data within a minimal HTML page, combining raw JavaScript with D3’s data-handling API.