How to add anchor jumping by using JavaScript?

To add anchor jumping by using JavaScript, we use the scrollTo method.

For instance, we write

const jump = (h) => {
  const top = document.getElementById(h).offsetTop;
  window.scrollTo(0, top);
};

to define the jump function.

In it, we get the element with getElementById.

And we get the y coordinate of the target element with offsetTop.

Then we call window.scrollTo with 0 and top to scroll to the element.