# marmelab/EventDrops

A time based / event series interactive visualization using d3.js

Repository: https://github.com/marmelab/EventDrops
Canonical: https://ross.abutalabs.com/products/eventdrops
Homepage: http://marmelab.com/EventDrops/
Language: JavaScript
License: MIT
License Family: permissive
Topics: dataviz, d3
Last push: 2024-08-19T15:26:06+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4369, "days_push": 744, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1252, forks 233 (observed 2026-08-28T04:04:08.350139+00:00)

## What it is
EventDrops is a JavaScript library for interactive time-based event series visualization built on D3.js. It renders timelines of timestamped events with pan and zoom support, distributed as an npm package.

## Use cases
- visualize commit history over time
- plot event series on an interactive timeline
- show timestamped events with pan and zoom
- display GitHub repository activity as a chart
- render time-based event data in the browser

## When to choose
- you need an interactive timeline of event occurrences built on D3
- you want a lightweight npm library for time-series event charts
- you need pan/zoom exploration of dense event data

## When to avoid
- you need general-purpose line or bar charts
- you need a charting framework with axes, legends, and many chart types
- your project doesn't use D3 or the DOM

## Facets
- artifact type: library
- maturity: maintenance
- function: data-visualization, charts
- domain: data-visualization, frontend, web-development
- platform: browser
- tags: d3js, event-series, timeline, interactive-charts, dataviz, javascript, nodejs

## Member repositories
- marmelab/EventDrops (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:08.350139+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 2026-08-30T05:07:33.684820+00:00, confidence not recorded.
  - readme: https://github.com/marmelab/EventDrops (fetched 2026-08-28T04:04:08.350139+00:00, sha 82d6b350e0e4)
  - homepage: http://marmelab.com/EventDrops/ (fetched 2026-08-29T12:18:21.779080+00:00, sha d52077ebb187)
- Data as of 2026-08-30T08:39:29.467469+00:00.