AwesomeDataviz

Cal-Heatmap

Time-series calendar heatmaps, similar to GitHub's contribution graph, built on D3.

Website GitHubnpm
GitHub stars
3.1K
npm downloads / week
19.1K
Commits, last 12 months
0
Contributors
22
Last commit
Latest release
4.2.4Dec 29, 2023

Overview

Cal-Heatmap is an open-source JavaScript charting library released under the MIT license. Its GitHub repository has 3,128 stars, 305 forks, and 22 contributors. It has not had a commit since Mar 3, 2024. The latest release, 4.2.4, was published on Dec 29, 2023. On npm it is downloaded about 19.1K times per week.

Its GitHub description: Cal-Heatmap is a javascript charting library to create a time-series calendar heatmap

GitHub topics: javascriptseries-datacalendar-heatmapd3jschartcalendar

Install

npm
npm install cal-heatmap
v4.2.4

Development activity

Commits per month to the default branch over the last 12 complete months.

01 Oct 2025 Nov Dec Jan 2026 Feb Mar Apr May Jun Jul Aug Sep
01 Oct 2025 Jan 2026 Apr Jul
0 commits from Oct 2025 to Sep 2026.
Show data as a table
MonthCommits
Oct 20250
Nov 20250
Dec 20250
Jan 20260
Feb 20260
Mar 20260
Apr 20260
May 20260
Jun 20260
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Popularity among JavaScript charting libraries

Chart.js 67.7K Apache ECharts 67.5K Plotly.js 18.4K ApexCharts 15.2K Frappe Charts 15.1K Chartist.js 13.4K Cal-Heatmap 3.1K
Chart.js 67.7K Apache ECharts 67.5K Plotly.js 18.4K ApexCharts 15.2K Frappe Charts 15.1K Chartist.js 13.4K Cal-Heatmap 3.1K
GitHub stars for Cal-Heatmap and the most-starred alternatives.
Show data as a table
ToolStars
Chart.js67,736
Apache ECharts67,453
Plotly.js18,356
ApexCharts15,169
Frappe Charts15,088
Chartist.js13,390
Cal-Heatmap3,128

Alternatives to Cal-Heatmap

  • Chart.js

    Charts with the canvas tag.

    67.7K starsJavaScriptMIT

  • Apache ECharts

    Highly customizable and interactive charts ready for big datasets.

    67.5K starsTypeScriptApache-2.0

  • Plotly.js

    Powerful declarative library with support for 20 chart types.

    18.4K starsJavaScriptMIT

  • ApexCharts

    Modern & Interactive SVG Charts.

    15.2K starsJavaScriptOther

  • Frappe Charts

    Simple, responsive SVG charts with zero dependencies.

    15.1K starsJavaScriptMIT

  • Chartist.js

    Responsive charts with great browser compatibility.

    13.4K starsTypeScriptMIT

Cal-Heatmap FAQ

Is Cal-Heatmap open source?

Yes. Cal-Heatmap is released under the MIT license, and its source code is on GitHub.

Is Cal-Heatmap still maintained?

It appears inactive: the latest commit was on Mar 3, 2024, over a year ago. It may still work well, but expect fewer fixes and updates.

How do I install Cal-Heatmap?

From npm: npm install cal-heatmap.

What are the best alternatives to Cal-Heatmap?

The most popular alternatives listed in JavaScript charting libraries are Chart.js, Apache ECharts, and Plotly.js. See the full ranking.

What language is Cal-Heatmap written in?

Cal-Heatmap is primarily written in TypeScript, according to GitHub.

Data: GitHub API, npm. Updated Oct 5, 2026.