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Heatmap Cell Crosshair
A contribution heatmap where the hovered day gains a ring, its row and column tint into a soft crosshair, and a readout glides above it. Days are radios, so arrow keys walk the grid.
Also known as: contribution graph tooltip, github heatmap hover css, calendar heatmap tooltip.
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Customizing this snippet
- Color: set
--tip-coloron the element or a parent. Currently previewing#3b82f6. - Base size: set
--tip-size. Every other dimension is inem, so the whole thing scales together. Currently previewing16px. - Speed: change the duration on the
transitionoranimationshorthand. Staggered delays are relative, so they keep their rhythm. - Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.