I am pretty new at coding in Javascript. I am trying to Copy my url through the action of button click which will fire the function below CopyTextFunction(). But I am not being able to find out why it is not working since alert(copyText); in my function shows that the text was copied.

function CopyTextFunction() {
                const params = new URLSearchParams(window.location.search);
                params.get('ID')
                var copyText = "http://randomsite.com/OnlineShop/ShopProducts?ID=" + params.get('ID');
                //alert(copyText);
                alert(copyText);
                navigator.clipboard
                  .writeText(copyText)
                  .then(() => {
                      alert("successfully copied");
                  })
                  .catch(() => {
                      alert("something went wrong");
                  });
            }