This example shows interactive multi-series line charts of daily temperatures in New York, San Francisco, and Austin, loaded from a TSV file. Users can brush to zoom and pan along the time axis, click a city’s line to toggle its visibility, and hover to highlight a specific series. Built with React and D3 v7, it uses `d3.zoom` for scaling and translation, `d3.axisBottom` for time-axis updates, and `d3.curveBasis` for smooth line rendering in SVG with animation transitions.