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jquery/jquery-migrate

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

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jquery/jquery-migrate has 2k+ stars and 450+ forks on GitHub, is written in JavaScript, and was last pushed on Oct 18, 2026. Data as of . Signed-in members get hourly updates — create a free account.

Summary Information

Updated 1 hour ago
Type:Library / SDKCategory(s):Build Systems & Package ManagersDeveloper Tools
Added to GitGenius on October 15th, 2026
Created on November 5th, 2012
Open Issues & Pull Requests: 9 (+0)
GitHub issues: Enabled
Number of forks: 477
Total Stargazers: 2,093 (+0)
Total Subscribers: 121 (+0)

Repository Insights (GitGenius)

Median issue/PR response: 14.6 hours
Mean response time: 245.4 days
90th percentile: 896.1 days
Tracked items: 21

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Maintainer activity

2 people did triage or write work on this repository in the last 12 months.

Counts unlabeled, assigned, unassigned, milestoned, demilestoned, locked, unlocked over the last 12 months. These are issue and pull request events that require triage or write permission. Commits and code review are not counted. labeled and renamed are excluded because GitHub issue forms record the issue author as the actor. Figures from October 18, 2026. This count is not comparable across projects: each project's automation decides which of these events a person emits. How this is counted.

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Issue Activity (beta)

Open issues: 3
New in 7 days: 0
Closed in 7 days: 0
Avg open age: 1,489 days
Stale 30+ days: 3
Stale 90+ days: 3

Recent activity

Opened in 7 days: 0
Closed in 7 days: 0
Comments in 7 days: 0
Events in 7 days: 0

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  • Has Pull Request (13)
  • 3.x-only (1)

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Detailed Description

jQuery Migrate is a development tool that helps developers upgrade jQuery by restoring removed APIs and warning about deprecated features.

When jQuery introduces breaking changes between major versions, applications relying on older APIs will break. jQuery Migrate solves this by providing a compatibility layer that restores removed and deprecated APIs, allowing code to continue functioning while the developer works through necessary updates. The tool emits console warnings during development to identify which deprecated features are being used, making it possible to systematically locate and fix compatibility issues before removing the tool entirely.

Developers should use jQuery Migrate when upgrading to a new major version of jQuery. The tool is essential for projects with substantial jQuery codebases that cannot be refactored all at once. Each version of jQuery Migrate is designed to work with a specific jQuery major version: version 1.x works with jQuery 1.x and 2.x, version 3.x works with jQuery 3.x, and version 4.x works with jQuery 4.x. The development build includes debugging output and console warnings to help identify problematic code, while the production build is minified and silent except for critical errors, making it suitable only for temporary use during the upgrade process rather than long-term deployment.

The project maintains separate development and production builds, with the development version providing detailed console warnings prefixed with "JQMIGRATE" and access to a messages array for programmatic inspection. The tool provides a documented list of all possible warnings and includes a plugin API that allows programmatic control over its behavior. Updates are released alongside jQuery major versions to ensure compatibility, with work-in-progress builds available for testing upcoming changes.