# paulirish/break-on-access

break on access to a property

Repository: https://github.com/paulirish/break-on-access
Canonical: https://ross.abutalabs.com/products/break-on-access
Language: JavaScript
License: NOASSERTION
License Family: other
Last push: 2019-06-02T23:18:13+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4735, "days_push": 2649, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1176, forks 125 (observed 2026-08-28T04:03:52.628551+00:00)

## What it is
A tiny JavaScript utility that sets a debugger breakpoint whenever a property is read or written, using Object.defineProperty accessors. It is typically pasted into Chrome DevTools snippets to find which code mutates or reads a given property.

## Use cases
- find what code is changing document.cookie
- break when a property value is modified
- trace who is reading scrollTop causing layout thrashing
- set conditional breakpoints on property access
- debug unexpected property mutations in the browser

## When to choose
- you need to find which script modifies or reads a specific DOM or object property
- you want a quick DevTools snippet without installing anything

## When to avoid
- you need breakpoints in Node.js or non-browser environments
- you need a full-featured debugging framework or monitoring solution

## Facets
- artifact type: library
- maturity: maintenance
- function: developer-tools
- domain: developer-tools, web-development
- platform: browser
- tags: debugging, breakpoints, devtools, property-access, javascript

## Member repositories
- paulirish/break-on-access (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:52.628551+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 2026-08-30T06:26:35.936469+00:00, confidence not recorded.
  - readme: https://github.com/paulirish/break-on-access (fetched 2026-08-28T04:03:52.628551+00:00, sha 46950f51b042)
- Data as of 2026-08-30T08:39:29.467469+00:00.