D3 Basic Template

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D3 Basic Template

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Last edited Nov 18, 2014

Created on Nov 18, 2014

This example demonstrates fundamental D3.js v3 techniques for data binding, SVG rendering, and DOM interaction. It creates an SVG bar chart from an array of numbers, using the standard update pattern with `.data()`, `.enter()`, and `.append("rect")` to draw orange rectangles whose heights correspond to the dataset values. The code then shows how to add new data, recolor selected elements, and use `.exit()` to handle unused data. It also illustrates CSS selectors, D3's selection API with `d3.select` and `d3.selectAll`, and event handling via `.on("mouseover")` and `.on("mouseleave")` for hover effects.

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