jQuery 4 has launched, celebrating 20 years of innovation in web development. This major update modernizes the library by removing legacy code and outdated browser support while ensuring simplicity an

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jQuery 4.0 has been released, marking the first major version in nearly 10 years and coinciding with the library's 20th anniversary. Key changes include dropping support for IE10 and older browsers, migrating the source from AMD to ES modules, switching from RequireJS to Rollup for packaging, and removing deprecated utility functions like jQuery.isArray and jQuery.parseJSON in favor of native browser equivalents. The slim build now weighs around 19.5k bytes gzipped. Trusted Types support has been added for improved CSP compliance. The jQuery Migrate plugin and a comprehensive upgrade guide are available to ease the transition. Community reaction is largely positive, with developers noting jQuery's continued relevance for maintaining legacy codebases, progressive enhancement, and server-rendered sites.

jQuery Releases v4: First Major Version in Almost 10 Years