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General Update Pattern-reusable: alphabet example D3v5 join

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JJimMaltby
Last edited Mar 6, 2022
Created on Mar 6, 2022

This example demonstrates the general update pattern for data joins in D3 v5, showing how SVG text elements transition between enter, update, and exit states as the dataset changes. The alphabet letters animate vertically, with entering elements appearing green from above, updating elements shifting horizontally in dark gray, and exiting elements dropping below in brown. Built as a reusable chart module with configurable width, height, and margins, it uses d3.transition with 750ms duration and 1000ms delays to sequence the state changes, with data bound by string identity.

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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