If it's on the same page, look into making headings link targets. The premise being the a tags in your nav point to an id on a heading tag e.g.
<a href="#about-us">...</a>
<!-- will take you to: -->
<h2 id="about-us">About us</h2>
To get a smooth scrolling experience instead of jumping to an anchor, you can achieve this by by using an eventListener on the header. Then using the getBoundingClientRect() of the how element to get its position on the page.
You can then scroll the window object to the position of the how Element.
let header = document.getElementById('hacker-header');
let how = document.getElementById('how');
header.addEventListener('click', () => {
window.scrollTo({
top: how.getBoundingClientRect().y,
left: how.getBoundingClientRect().x,
behavior: 'smooth'
});
});
body {
background: black;
}
h1 {
color:lime;
}
#high {
height: 5000px;
width:200px;
background: linear-gradient(180deg, rgba(112,135,95,1) 0%, rgba(21,55,31,1) 35%, rgba(7,121,5,1) 100%);
}
<header id="hacker-header">
<h1>Hacker</h1>
</header>
<div id="high">
</div>
<footer id="how">
<h1>How</h1>
</footer>