Simple smooth scrolling for internal links

smoothScroll.js

function smoothScroll() {
  const internalLinks = document.querySelectorAll('a[href^="#"]');

  internalLinks.forEach(
    function(currentLink) {

      const linkHref = currentLink.getAttribute('href');

      currentLink.addEventListener("click", function(event) {
        document.querySelector(linkHref).scrollIntoView({
          behavior: 'smooth'
        });
        event.preventDefault();
      }, false);
    }
  );
}