D3 beginning

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Last edited Apr 25, 2023

Created on Apr 24, 2023

This example shows a grid of thin horizontal and vertical rectangles that intersect to form a visible weave pattern, with a circular region in the center where the crossing lines appear to invert in contrast. The visualization uses D3 v6’s `select` and `range` functions to generate 100 rectangles in each direction, appended as SVG elements across the full window width and height. Two SVG masks, each containing a rectangle and a circle, selectively control which parts of the horizontal and vertical lines remain visible, creating the central circular effect against a dark background.

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

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