Fork of React & D3 Vibecoding Starter
This example shows a bar chart of letter frequencies from a small CSV dataset. A React component manages the chart's container and state, while D3 v7 functions handle the core rendering: `scaleBand` and `scaleLinear` create the axes, `axisBottom` and `axisLeft` draw them, and `renderBarElements` builds the interactive bars. Clicking a bar toggles its selection, changing its fill color and the opacity of others. The chart is responsive, using a `ResizeObserver` to update dimensions.
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