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This article provides an in-depth exploration of various implementation approaches for detecting click events outside specific elements in web development, with focus on two mainstream methods using jQuery and native JavaScript. Through comparative analysis of event propagation mechanisms and DOM traversal detection techniques, it elaborates on implementation principles, code examples, and applicable scenarios for each approach. The article also incorporates modern frontend development requirements, offering advanced techniques including event listener management, performance optimization, and accessibility improvements, presenting developers with a comprehensive and reliable solution set.