Check if event target is hyperlink

You should get it through

if(event.target.tagName.toLowerCase() === 'a')
{
    event.target.href; //this is the url where the anchor tag points to.
}

You could check the tagName property, as said by @parthik-gosar. Another way is to use the instanceof operator to check the element class (hyperlinks are of type HTMLAnchorElement):

if (event.target instanceof HTMLAnchorElement) {
  console.log(event.target.href);
}