Fork of Vega-Lite API Template
This visualization uses a Vega-Lite area mark to plot a scatter-like distribution of automobile data, displaying engine displacement against horsepower, with tooltips revealing car model names. The entire view fills the browser window, using a semitransparent fill and custom axis styling from a dark-themed config. It loads data from a CSV of auto-mpg records via D3’s `csv` method, and builds the chart with the `vega-lite-api` library, registering Vega, Vega-Lite, and a tooltip handler for interactive popups.