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Amazon URL Cleaner

Show the shortest possible URL for Amazon items.

  1. // ==UserScript==
  2. // @name        Amazon URL Cleaner
  3. // @description Show the shortest possible URL for Amazon items.
  4. // @namespace   https://arantius.com/misc/greasemonkey/
  5. // @match       https://www.amazon.com/dp/*
  6. // @match       https://www.amazon.com/*/dp/*
  7. // @match       https://www.amazon.com/gp/product/*
  8. // @match       https://www.amazon.com/*/ASIN/*
  9. // @run-at      document-start
  10. // @version     9
  11. // @grant       none
  12. // @icon        https://www.amazon.com/favicon.ico
  13. // ==/UserScript==
  14.  
  15. function getProductId() {
  16.   var m;
  17.   m = document.location.href.match(/(?:.+\/)?dp\/([^/?]+)/);
  18.   if (m) return m[1];
  19.   m = document.location.href.match(/gp\/product\/([^/?]+)/);
  20.   if (m) return m[1];
  21.   m = document.location.href.match(/ASIN\/([^/?]+)/);
  22.   if (m) return m[1];
  23. }
  24.  
  25. var productId = getProductId();
  26. if (productId) {
  27.   history.replaceState(
  28.       {}, document.title, 'https://www.amazon.com/dp/' + productId);
  29. }