This example shows a line chart of weekly temperature readings from San Francisco, using Vega-Lite’s declarative API. The chart encodes time on the x-axis and temperature on the y-axis, with a tooltip revealing the precise temperature value per point. The visualization is built with the `vega-lite-api` library, which registers Vega and Vega-Lite, and loads data via `d3.csv`. It renders interactively to an SVG, sized to the window, with custom axis and label styling from a configuration object.