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Last edited Apr 11, 2023

Created on Apr 11, 2023

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This example displays a choropleth map of Canada using D3 v7, with provinces rendered as SVG paths via `d3.geoPath` and an Albers projection. Hovering over a province changes its fill color from green to red and triggers a tooltip div, positioned via mouse event coordinates, that shows the province name from the loaded GeoJSON data. The tooltip is shown and hidden by toggling a CSS class, and the map data is fetched from a GitHub-hosted GeoJSON file.

AI-generated description

An example showing hovering on a map:

Loads d3v7 via UNPKG.
Loads map of Canada
On mouse move :
- shows a div by modifying its css properties
- modifies the content and position of a div (the tooltip)
- changes the css class of the state to change its color
On mouse out :
- hides the tooltip div

MIT Licensed

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