Checking for Ampersands

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Checking for Ampersands

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Last edited May 3, 2024

Created on May 3, 2024

Two SVG canvases demonstrate D3 data joins and selections. One canvas shows circles appended with fixed attributes, while the other begins with hard-coded rectangles that are re-selected, recolored red, and repositioned. The example then binds a small array of country weight objects to empty selections, joining circles whose radius and x-position derive from data properties. D3’s `select`, `selectAll`, `data`, `join`, and `attr` methods handle the DOM updates, with data transformations like doubling weights performed in plain JavaScript before rendering.

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

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