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Neurohackweek 2017 D3 Tutorial

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Aakeshavan
Last edited Aug 31, 2017
Created on Aug 31, 2017

An interactive bar chart demonstrates D3.js data binding and transitions. The visualization renders an array of numeric values as horizontal bars, with buttons to add, remove, or randomize data points. Hovering changes a bar’s color, while clicking enlarges it by 50% with a bounce easing effect. The code uses `d3.select`, `.data()`, `.enter()`, `.exit()`, and chained `.transition().duration(1000)` methods to animate bar widths and opacity. Mouse events (`mouseover`, `mouseout`, `click`) trigger style changes and re-bind updated data, showing dynamic updates in a div-based layout with CSS classes.

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