Remove a query parameter from the URL (e.g. fbclid) and replace the history with the cleaner URL

remove-parameter-on-page-ready.js

// Using jQuery
$(document).ready(function(){

  // Remove fbclid
  removeParam('fbclid');

  function removeParam(parameter) {
    let params   = new URLSearchParams(document.location.search);
    let urlParts = document.location.href.split('?');
    let newUrl;

    // Delete the passed parameter if present (no need to check)
    params.delete(parameter);

    if (params.toString() !== "") {
      // If any other parameters were present, reappend
      newUrl = urlParts[0] + '?' + params.toString()
    } else {
      newUrl = urlParts[0];
    }
    
    // Stripping a parameter should not push a new history state, hence replaceState
    history.replaceState('', document.title, newUrl);
  }

}(jQuery));