jQuery 4.0 Migration

Status: Production Ready Last Updated: 2026-01-25 Dependencies: None Latest Versions: jquery@4.0.0, jquery-migrate@4.0.2

Quick Start (5 Minutes)

1. Add jQuery Migrate Plugin for Safe Testing

Before upgrading, add the migrate plugin to identify compatibility issues:

<!-- Development: Shows console warnings for deprecated features -->
<script src="https://code.jquery.com/jquery-4.0.0.js"></script>
<script src="https://code.jquery.com/jquery-migrate-4.0.2.js"></script>