Developer builds JS library to auto-route Amazon affiliate links by visitor region

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A developer who runs multiple content sites built an open-source JavaScript library called Amazon Store to solve a long-standing affiliate linking problem. Because Amazon operates separate regional stores, a single hardcoded link often fails to earn commission when clicked by international visitors. The library uses browser signals such as navigator.languages and time zone to detect a visitor's likely region, then dynamically rewrites the link to the correct Amazon domain and associates tag. It works as progressive enhancement, meaning the original link remains functional even if JavaScript is disabled or blocked. The tool requires just an ASIN and an associates tag, eliminating the need to maintain separate store-specific links across multiple sites.

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