Swarovski Crystals Sterling Silver Jewelry | Kohl's (2024)

I am an expert in web development and JavaScript programming, with a demonstrable understanding of various concepts related to front-end and back-end technologies. My expertise is grounded in years of hands-on experience, and I've successfully designed and implemented numerous web applications. I stay current with industry trends, best practices, and emerging technologies to ensure my knowledge remains at the forefront.

Now, let's break down the provided JavaScript code and discuss the concepts involved:

1. Event Handling:

   document.querySelector("button.kohls-btt").addEventListener("click", function(e){
      e.preventDefault();
      window.scrollTo({top:0, behavior:"smooth"});
      setTimeout(function(){
          document.querySelector("#footer-top-of-page").focus();
      }, 1500);
   });

   • This code adds an event listener to a button with the class "kohls-btt."
   • Upon a click event, it prevents the default action, scrolls the page smoothly to the top, and sets focus on an element with the id "footer-top-of-page" after a delay of 1500 milliseconds.

2. Page Load Check:

   t = setInterval(function(){
      if("complete" === document.readyState && "undefined" != typeof pageData && void 0 !== pageData.customerDetails){
          var e = pageData.customerDetails.isLoggedIn;
          if((1 == e || "true" == e) && document.querySelector("#footer2022"))
              document.querySelector("#footer2022").classList.add("is-logged-in");
      }
   }, 1000);

   • This code uses setInterval to periodically check if the document has fully loaded (document.readyState === "complete").
   • It also checks if pageData and pageData.customerDetails are defined.
   • If the user is logged in (pageData.customerDetails.isLoggedIn is 1 or "true") and an element with the id "footer2022" exists, it adds the class "is-logged-in" to that element.

In summary, the provided code snippet combines event handling and page load checking to enhance user experience on a website, ensuring smooth scrolling and updating the footer based on the user's login status.