This fork of the Vega-Lite API template displays a time-series area chart of temperature data from a CSV file. The visualization uses the `vega-lite-api` to define a markArea encoding with `timestamp` on the x-axis and `temperature` on the y-axis, including a tooltip. The code loads data via `d3.csv` and renders the chart using Vega-Lite and Vega, with custom styling from a `config.js` file and tooltip functionality from `vega-tooltip`. It fills the browser window by setting the width and height to the viewport size.