pa7/heatmap.js
Some data may be outdated — see provenance labels.
🔥 JavaScript Library for HTML5 canvas based heatmaps observed · 2026-09-24
Health v2 · maintenance only
23/100
- Activity 0
- Release rhythm 8
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 5661
- days_rel: n/a
- days_push: 1086
- n_releases_24m: 0
Adoption not part of the score
6385 stars · 1313 forks observed · 2026-09-24
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
heatmap.js is a lightweight JavaScript library for rendering dynamic heatmaps on HTML5 canvas in the browser. It supports plugins for map libraries like Leaflet, Google Maps, and OpenLayers, and can handle 40k+ datapoints.
Use cases
- visualize user click behavior on a webpage as a heatmap
- plot thousands of geo events on a Leaflet map as a density heatmap
- add an interactive heatmap overlay to Google Maps
- render point density visualizations on HTML5 canvas
- create a heatmap legend with gradient colors and opacity controls
When to choose
- you need client-side heatmap rendering in the browser with a tiny footprint
- you want heatmap overlays on Leaflet, Google Maps, or OpenLayers
- you need a simple, well-documented canvas-based density visualization
When to avoid
- you need server-side or non-browser heatmap rendering
- you need actively developed features or timely PR merges
- you need WebGL-scale performance for millions of points
Facets
library · maturity maintenance
data-visualization charts data-visualization web-development browser heatmap canvas leaflet google-maps openlayers density-visualization gis maps javascript
4 sources
- readme: https://github.com/pa7/heatmap.js · fetched 2026-09-24 · 93bf8e679b51
- homepage: https://www.patrick-wied.at/static/heatmapjs/ · fetched 2026-08-29 · 622a3d2b8931
- site_page: https://www.patrick-wied.at/static/heatmapjs/docs.html · fetched 2026-08-29 · 22df88d505c8
- site_page: https://www.patrick-wied.at/static/heatmapjs/frequently-asked-questions.html · fetched 2026-08-29 · 896883fd7d5e
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| pa7/heatmap.js | main | 23 |
For agents
markdown · JSON · MCP: product_card(name="pa7/heatmap.js")
Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem