CSS overflow scrolling and hidden scrollbar (iOS)

As seen here: https://forum.webflow.com/t/how-do-i-hide-the-browser-scrollbar-from-appearing-when-a-user-scrolls/59643/5

::-webkit-scrollbar {
    display: none; // Safari and Chrome
}

seems to work.

As of May 2020, this was the only solution that allowed me to hide the horizontal scrollbar on iOS Safari - including when the website is installed on the home screen as a PWA.

The idea is to make your container slightly higher than it needs to be with a padding-bottom, and to clip out that extra space where to scrollbar appears with clip-path.

Here is a snippet:

.scroll-container {
  width: 100%;
  padding-bottom: 30px;
  white-space: nowrap;
  overflow: auto;
  clip-path: inset(0 0 30px 0);
}

.item {
  display: inline-block;
  width: 150px;
  height: 300px;
  margin-right: 20px;
  background-color: #ddd;
  border-radius: 20px;
}

<div class="scroll-container">
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
</div>

This does have the disadvantage of adding extra space, which does push down the other elements below. This issue could be negated / prevented with a negative margin. It wouldn't be super clean, but it would work.

Ex.:

.scroll-container { margin-bottom: -30px; }

I just played with this CodePen and it seems that if you set the background-color to transparent for all three properties below (and in this example also remove box-shadows), the scrollbar is not visible at all:

#style-1::-webkit-scrollbar-track {
  //    -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.1);
  background-color: transparent;
}

#style-1::-webkit-scrollbar {
  background-color: transparent;
}

#style-1::-webkit-scrollbar-thumb {
  //    -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3);
  background-color: transparent;
}

This was tested in Chrome Desktop, Chrome for Android, and iOS Safari (v8.4) on an iPhone 6+.

I would however recommend for user experience (usability/accessibility) to keep the scrollbar visible though, as even I, knowing what I was doing, got a bit confused when there was no scrollbar.