# HumbleSoftware/Flotr2

Graphs and Charts for Canvas in JavaScript.

Repository: https://github.com/HumbleSoftware/Flotr2
Canonical: https://ross.abutalabs.com/products/flotr2
Homepage: http://www.humblesoftware.com/flotr2/
Language: JavaScript
License: MIT
License Family: permissive
Last push: 2025-09-01T11:17:46+00:00

## Health v2 (maintenance only)
Score: 53/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 39, release rhythm 45, longevity 100
- inputs: {"age_days": 5510, "days_push": 366, "days_rel": 367, "gap_med": 5, "n_releases_24m": 2}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2440, forks 519 (observed 2026-08-28T04:06:52.322725+00:00)

## What it is
Flotr2 is a JavaScript charting library that renders graphs and charts (line, bar, pie, etc.) on HTML5 Canvas. It features a modular plugin-based architecture with extensible graph types and a simple draw API.

## Use cases
- draw line charts in the browser with canvas
- render pie and bar charts in JavaScript
- add interactive charts to a web page
- visualize data series with axes and gridlines
- embed lightweight canvas graphs without heavy dependencies

## When to choose
- you need lightweight canvas-based charts with no large framework dependency
- you want a simple draw API with extensible plugins and graph types
- you need classic chart types like line, bar, and pie in vanilla JavaScript

## When to avoid
- you need modern SVG rendering or React/Vue integration
- you require extensive chart types like heatmaps, treemaps, or 3D charts
- you want a library with frequent updates and a large active community

## Facets
- artifact type: library
- maturity: maintenance
- function: data-visualization, charts
- domain: data-visualization, frontend, web-development
- platform: browser
- tags: canvas, charting, html5, graphing, javascript-library, javascript

## Member repositories
- HumbleSoftware/Flotr2 (main) score 53

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:52.322725+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:30:43.878561+00:00, confidence not recorded.
  - readme: https://github.com/HumbleSoftware/Flotr2 (fetched 2026-08-28T04:06:52.322725+00:00, sha e978d487a986)
  - registry_npm: https://registry.npmjs.org/flotr2 (fetched 2026-08-29T10:12:22.791315+00:00, sha 8f25ab5f9480)
- Data as of 2026-08-30T08:39:29.467469+00:00.