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This article provides a comprehensive analysis of the technical challenges and solutions for hiding the default 'No File Chosen' tooltip displayed by file input elements (<input type='file'>) in Google Chrome. Focusing on WebKit engine's inherent behavior, it details a complete implementation using CSS opacity properties combined with JavaScript event handling, while comparing alternative approaches. The content covers HTML structure design, CSS styling control, JavaScript interaction logic, and cross-browser compatibility considerations, offering frontend developers a practical and reliable implementation strategy.