# jquery/jquery-migrate

A development tool to help migrate away from APIs and features that have been or will be removed from jQuery core

Repository: https://github.com/jquery/jquery-migrate
Canonical: https://ross.abutalabs.com/products/jquery-migrate
Language: JavaScript
License: NOASSERTION
License Family: other
Last push: 2026-08-10T23:11:52+00:00

## Health v2 (maintenance only)
Score: 87/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 66, longevity 100
- inputs: {"age_days": 5049, "days_push": 23, "days_rel": 224, "gap_med": 20.0, "n_releases_24m": 3}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2093, forks 476 (observed 2026-08-28T04:06:13.087784+00:00)

## What it is
jQuery Migrate is a browser plugin that restores APIs removed from jQuery core and logs console warnings when deprecated or removed APIs are used. It helps developers upgrade old jQuery codebases to newer jQuery versions incrementally before removing the plugin.

## Use cases
- upgrade a legacy jQuery 1.x/2.x codebase to jQuery 3.x
- migrate an app from jQuery 3.x to jQuery 4.x
- find deprecated jQuery API usage via browser console warnings
- keep old plugins working while upgrading jQuery core
- audit a codebase for removed jQuery features before cleanup

## When to choose
- you are upgrading a jQuery-dependent project across major versions
- you need old removed APIs to keep working during a transition
- you want to identify deprecated jQuery usage in the console

## When to avoid
- you are starting a new project with no legacy jQuery code
- your codebase already runs on modern jQuery without deprecated APIs
- you want a long-term shim rather than a migration aid

## Facets
- artifact type: plugin
- maturity: stable
- function: developer-tools, middleware
- domain: web-development, frontend, developer-tools
- platform: browser
- tags: jquery, migration, browser-plugin, compatibility, deprecation-warnings, javascript

## Member repositories
- jquery/jquery-migrate (main) score 87

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:13.087784+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 2026-08-30T02:55:28.110177+00:00, confidence not recorded.
  - readme: https://github.com/jquery/jquery-migrate (fetched 2026-08-28T04:06:13.087784+00:00, sha 77c91c148bd0)
  - registry_npm: https://registry.npmjs.org/jquery-migrate (fetched 2026-08-29T10:35:20.768288+00:00, sha 2c5a045796d3)
- Data as of 2026-08-30T08:39:29.467469+00:00.