A Pen by Chris Coyier on CodePen.
Created
August 21, 2018 00:11
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Save CodeMyUI/2a233979dbee2aede0abaa6011157df7 to your computer and use it in GitHub Desktop.
Sticky, Smooth, Active Nav
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<header> | |
<h1>Website</h1> | |
</header> | |
<nav> | |
<ul> | |
<li><a href="#section-1">Section 1</a></li> | |
<li><a href="#section-2">Section 2</a></li> | |
<li><a href="#section-3">Section 3</a></li> | |
<li><a href="#section-4">Section 4</a></li> | |
<li><a href="#section-5">Section 5</a></li> | |
<li><a href="#section-6">Section 6</a></li> | |
<li><a href="#section-7">Section 7</a></li> | |
<li><a href="#section-8">Section 8</a></li> | |
<li><a href="#section-9">Section 9</a></li> | |
</ul> | |
</nav> | |
<main> | |
<section id="section-1"> | |
<h1>Section 1</h1> | |
<p>Lorem, ipsum dolor sit amet consectetur adipisicing elit. Officiis, blanditiis expedita? Earum eligendi pariatur quaerat quos expedita ab quibusdam ratione veniam in, mollitia fuga repudiandae?</p> | |
</section> | |
<section id="section-2"> | |
<h1>Section 2</h1> | |
<p>Ratione nulla nam, ipsa dignissimos corrupti veniam nostrum, laudantium asperiores sequi numquam placeat velit voluptate in praesentium non labore unde incidunt laborum maxime quae magni.</p> | |
</section> | |
<section id="section-3"> | |
<h1>Section 3</h1> | |
<p>Soluta quibusdam ad nostrum vel voluptate delectus sequi dolores quia quaerat officia corrupti, aperiam fugit facere debitis repudiandae praesentium sapiente inventore repellendus, nemo commodi alias!</p> | |
</section> | |
<section id="section-4"> | |
<h1>Section 4</h1> | |
<p>Aliquid aliquam magnam ducimus similique obcaecati, unde exercitationem laborum incidunt, quas in ipsum inventore nostrum? Blanditiis optio cumque earum iste odio! Alias sint accusamus repudiandae.</p> | |
</section> | |
<section id="section-5"> | |
<h1>Section 5</h1> | |
<p>Officia ipsum fugit iure eaque quisquam error tempore earum enim illum, delectus officiis incidunt corrupti aliquid nam quas perspiciatis eveniet doloremque quod labore? Doloremque, ipsum?</p> | |
</section> | |
<section id="section-6"> | |
<h1>Section 6</h1> | |
<p>Aperiam repellat dignissimos fugiat possimus esse, suscipit neque nisi libero alias obcaecati ipsam, porro illo corrupti nostrum reprehenderit unde, illum in laudantium impedit. Modi, veniam.</p> | |
</section> | |
<section id="section-7"> | |
<h1>Section 7</h1> | |
<p>Cum asperiores temporibus itaque consequatur quod inventore, quia quis explicabo dicta esse minus voluptatem reiciendis eveniet animi, necessitatibus illum dolorem doloremque repellat placeat, dolores eaque.</p> | |
</section> | |
<section id="section-8"> | |
<h1>Section 8</h1> | |
<p>Optio qui, omnis itaque rerum iusto molestiae necessitatibus deleniti quod tenetur id perspiciatis voluptatum dolorum quisquam eius ipsum non architecto labore! Distinctio, tenetur. Officiis, necessitatibus?</p> | |
</section> | |
<section id="section-9"> | |
<h1>Section 9</h1> | |
<p>Rem iste iure blanditiis excepturi esse nisi corrupti sequi, illo, laborum quo quis quaerat assumenda perspiciatis quod fuga vel laudantium doloribus architecto tempora omnis earum!</p> | |
</section> | |
</main> | |
<footer> | |
©2018 Footer | |
</footer> |
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let mainNavLinks = document.querySelectorAll("nav ul li a"); | |
let mainSections = document.querySelectorAll("main section"); | |
let lastId; | |
let cur = []; | |
// This should probably be throttled. | |
// Especially because it triggers during smooth scrolling. | |
// https://lodash.com/docs/4.17.10#throttle | |
// You could do like... | |
// window.addEventListener("scroll", () => { | |
// _.throttle(doThatStuff, 100); | |
// }); | |
// Only not doing it here to keep this Pen dependency-free. | |
window.addEventListener("scroll", event => { | |
let fromTop = window.scrollY; | |
mainNavLinks.forEach(link => { | |
let section = document.querySelector(link.hash); | |
if ( | |
section.offsetTop <= fromTop && | |
section.offsetTop + section.offsetHeight > fromTop | |
) { | |
link.classList.add("current"); | |
} else { | |
link.classList.remove("current"); | |
} | |
}); | |
}); |
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html { | |
scroll-behavior: smooth; | |
} | |
body { | |
margin: 0; | |
display: grid; | |
grid-template-columns: min-content 1fr; | |
font-family: system-ui, sans-serif; | |
/* this breaks position sticky in Firefox */ | |
/* overflow-x: hidden; */ | |
} | |
header { | |
grid-column: 1 / 3; | |
background: #455A64; | |
color: white; | |
padding: 4rem; | |
text-align: center; | |
} | |
nav { | |
white-space: nowrap; | |
background: #37474F; | |
} | |
nav ul { | |
list-style: none; | |
margin: 0; | |
padding: 0; | |
} | |
/* Only stick if you can fit */ | |
@media (min-height: 300px) { | |
nav ul { | |
position: sticky; | |
top: 0; | |
} | |
} | |
nav ul li a { | |
display: block; | |
padding: 0.5rem 1rem; | |
color: white; | |
text-decoration: none; | |
} | |
nav ul li a.current { | |
background: black; | |
} | |
main { | |
padding-bottom: 40rem; | |
} | |
section { | |
padding: 2rem; | |
margin: 0 0 2rem 0; | |
} | |
footer { | |
grid-column: 1 / 3; | |
background: #607D8B; | |
padding: 5rem 1rem; | |
} |
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