How to implement date subtraction function with mouseover/out in js?

Question

JavaScript

How to implement a function in js that records dates on mouseover and mouseout on any link in html, and subtracts the first one from the second one (In fact, find out the time the mouse spent over the link)?

I found something similar, on learn js, but I just can’t convert it to my task:

function mouselog(event) {
  let d = new Date();
  text.value += `${d.getHours()}:${d.getMinutes()}:${d.getSeconds()} | ${event.type} [target: ${event.target.id}]\n`.replace(/(:|^)(\d\D)/, '$10$2');
  text.scrollTop = text.scrollHeight;
}

Answer 1

let link = document.querySelector('.link');
link.addEventListener('mouseover', () => {
    let start = new Date();

    link.addEventListener('mouseout', () => {
        let end = new Date();
        console.log(end - start);
    });
});