Very Simple HTML Scroll To Top Button (Free Download)

Welcome to a quick tutorial on how to create a simple HTML scroll to top button. There are a ton of scroll-to-top plugins all over the Internet, but know what? Forget those overly complicated ones. We don’t even need to load an entire library just to create a “back to top” button.

Yes, that’s all. But let us walk through a better example in this guide – Read on!

ⓘ I have included a zip file with all the source code at the start of this tutorial, so you don’t have to copy-paste everything… Or if you just want to dive straight in.

 

 

QUICK SLIDES

 

TABLE OF CONTENTS

Download & Notes	Back To Top	Useful Bits & Links
The End

 

 

QUICK NOTES

If you spot a bug, feel free to comment below. I try to answer short questions too, but it is one person versus the entire world… If you need answers urgently, please check out my list of websites to get help with programming.

 

EXAMPLE CODE DOWNLOAD

Click here to download all the example source code, I have released it under the MIT license, so feel free to build on top of it or use it in your own project.

 

 

 

1) THE HTML

<!-- "BACK TO TOP" BUTTON AT BOTTOM -->
<img src="up-button.png" id="backtop" onclick="totop()"/>

Just an image button. Yep, that’s all.

 

2) FIXED BUTTON ON THE CORNER

#backtop {
  /* (A) BOTTOM RIGHT CORNER */
  position: fixed;
  bottom: 20px; right: 20px;
  z-index: 999;

  /* (B) HIDDEN BY DEFAULT */
  visibility: none;
  opacity: 0;

  /* (C) COSMETICS */
  cursor: pointer;
  transition: opacity 0.3s;
}

/* (D) SHOW BUTTON */
#backtop.show {
  visibility: visible;
  opacity: 1;
}

Next, we add some CSS to the button:

1. position: fixed; bottom: X; right: X; will fix the button at the lower right corner, regardless of the scrolling.
2. visibility: none; opacity: 0; Hide the button by default.
3. Well, just a bit of cosmetics.
4. .show { visibility: visible; opacity: 1; } The idea is to attach this CSS class to the button when the user has scrolled down sufficiently, this will show the button; When the user is back at the top, we remove this CSS class to hide the button.

 

 

3) JAVASCRIPT

// (A) SMOOTH SCROLL TO TOP
function totop () {
  window.scroll({
    top: 0, left: 0, behavior: "smooth"
  });
}

// (B) SHOW/HIDE BUTTON
function togtop () {
  if (window.scrollY >= 100) {
    document.getElementById("backtop").classList.add("show");
  } else {
    document.getElementById("backtop").classList.remove("show");
  }
}
window.addEventListener("scroll", togtop);
window.addEventListener("resize", togtop);

Lastly, the Javascript should be pretty straightforward.

1. Fired when we click on the “back to top” button, smooth scroll to the top of the page.
2. Sadly, CSS cannot detect scrolling at the time of writing. So we will use window.scrollY to detect the scrolling, add/remove the show CSS class to show/hide the “back to top” button accordingly.

 

 

 

LINKS & REFERENCES

• Smooth Scroll Animation With CSS & Javascript – Code Boxx
• PNGTree – Search for your free “up buttons” here
• Back To Top Button Demo on CodePen

 

INFOGRAPHIC CHEAT SHEET