This bar chart visualizes temperature measurements over time, derived from a Twitter sentiment dataset hosted at sentiment.stefanzhang.com. The visualization uses Vega-Lite’s API via `vega-lite-api`, with the chart configured through `vl.markBar()` and encoding time on the x-axis and temperature on the y-axis, both with scales that do not include zero. It fetches data asynchronously using `d3.csv` from the D3 library, then renders the plot to fill the browser window with a custom dark theme and tooltip support from `vega-tooltip`.