text: // let productListContainer = document.querySelector("#product-showcase");
  // let productList = document.querySelector(".mdl-list");
  // console.log(`productList element: $productList`);
  
  // function isFavorite(productEntry) {
  //     return isItemInLocalStorageCollection(COLLECTION_NAMES.FAVORITES, productEntry.id);
  // }
  
  let topImageElement = document.getElementById('top-image');
  let productListings = document.getElementById('product-showcase');
  
  let elementListToHideUnhide = [productListContainer, topImageElement, productListings];
  
  window.onload = (event) => {
  
      // Launch loading spinner upon page load
      // and hide/stop it after 1 second. 
      launchLoadingSpinner(elementListToHideUnhide);
      let stopLoadSpinnerWrapper = () => { // For setTimeout argument
          stopLoadingSpinner(elementListToHideUnhide);
      }
      setTimeout(stopLoadSpinnerWrapper, 1000);
  
      setupProductListAndPopulateProductData(COLLECTION_NAMES.SAVED_FOR_LATER /*inputCollectionName*/ , false /*isNotSavedProductList*/ );
  
      checkForEmptySavedForLaterListAndDisplayCustomContent();
  };