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General Update Pattern - reusable: alphabet example v3

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JJimMaltby
Last edited Dec 30, 2021
Created on Dec 29, 2021

This example demonstrates the general update pattern for data joins in D3 v5, showing how text elements enter, update, and exit as the underlying array changes. It renders animated SVG text using a reusable chart module with configurable width, height, and margins. The code uses `d3.selectAll().data()` with a key function, `transition()` for 750ms animations, and `merge()` to combine enter and update selections. Each state is color-coded: green for entering, steelblue for entering-and-updating, black for updating, and brown for exiting elements.

AI-generated description

MB alphabet example: https://bl.ocks.org/mbostock/3808234 https://bl.ocks.org/john-guerra/cabfbaed34d942e4dd81199855e4987f

A vanilla HTML implementation of Rob Moores updateable pattern Towards Updatable https://www.toptal.com/d3-js/towards-reusable-d3-js-charts.

It is derived from Mike Bostock's Towards Reusable Charts (https://bost.ocks.org/mike/chart/) as the source of the foundational principles.

Will evolve to use the ProD3 pattern (Pro D3.js Use D3.js to Create Maintainable, Modular, and Testable Charts by Marcos Iglesias https://www.apress.com/gp/book/9781484252024) as the basis for further charts.

MIT Licensed

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