using javascript to search the element

index.js

window.addEventListener('load',function () {
  console.log('Loaded')
  let wislistBtns = document.querySelectorAll('.update-wishlist')
  if (wislistBtns) {
      for (let i = 0; i < wislistBtns.length; i++) {
          wislistBtns[i].addEventListener('click', function () {
              const productID = this.dataset.product
              const action = this.dataset.action
              console.log('productID:', productID, 'Action:', action)
              if (user === 'AnonymousUser') {
                  console.log('User is Anonymous')
              } else {
                  updateUserWishlist(productID, action)
              }
          })
      }
  }
})