d3 update() exit()

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d3 update() exit()

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Last edited Jan 12, 2021

Created on Jan 12, 2021

This example demonstrates how D3's update and exit states work when binding data to existing DOM elements. It shows four paragraph elements for dog, cat, pig, and rat, which are then bound to a two-item dataset using `d3.select('body').selectAll('p')` and `.data(dataset)`. The update state calls `.text()` to display values, while the exit state uses `.exit()` to label elements that no longer have corresponding data, showing their index positions. The code explicitly avoids calling `.remove()` on the exiting elements, leaving them visible for inspection in the browser.

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A bare minimum HTML page demonstrating use of CSS and JavaScript.

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