Set canonical to match pagination if using Webflow pagination

set-canonical-if-pagination.js

// Original code source and use agreement here: https://gist.github.com/rileyrichter/b2e5b5d9fe8952372ce49fafc75dea8b

const canonical = document.querySelector('link[rel="canonical"]');
const urlParams = new URLSearchParams(window.location.search);
const paginationParam = Array.from(urlParams.entries()).find(([key]) =>
  /^[a-z0-9]{8}_page$/.test(key)
);

if (paginationParam) {
  const canonical = document.querySelector('link[rel="canonical"]');
  canonical.href = `${canonical.href}?${paginationParam.join("=")}`;
}