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NYC Interactive Crash Bar Chart with React & D3

✓ Published1🌍 Public
JJose Morales
Last edited Nov 6, 2025
Created on Oct 30, 2025

This interactive bar chart visualizes the distribution of vehicle collisions across a 24-hour day in New York City, stacking counts of injuries, deaths, and other crashes for each hour. Built with React 19 and D3 v7, it uses `d3.stack` to create layered bars and `d3.scaleLinear` for axes. Hovering a bar triggers D3 mouse events that dim non-hovered bars and display a tooltip with hourly breakdowns. The chart resizes responsively by recalculating SVG dimensions, and loads data from an external CSV file.

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MIT Licensed

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