Using Classes

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Last edited Mar 20, 2019

Created on Mar 20, 2019

This example demonstrates D3.js's class-based selection methods for updating SVG elements. A set of red circles appears at different x-axis positions over four sequential render calls, showing how enter, merge, and exit operations manage the growing and shrinking dataset. The code uses `selectAll(".point")` with the `.enter()`, `.merge()`, and `.exit()` API to incrementally add and remove circle elements, maintaining consistent styling through CSS classes.

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