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Jan 21, 2026 · Frontend Development

What’s New in jQuery 4.0? Major Changes, Size Cut, and Trusted Types Support

jQuery 4.0, the first major release in a decade, drops IE 10 support, switches to ES modules, removes obsolete APIs, shrinks the library by over 3 KB, adds Trusted Types protection, and sparks mixed opinions about the future relevance of the once‑ubiquitous JavaScript library.