What could be causing the big white border when setting the overflow setting of divs to scroll in Webflow?

A large white border appearing when setting a div’s overflow to scroll is usually caused by an issue in layout spacing, fixed dimensions, or inherited styles.

1. Check Overflow Dimensions and Padding

• When overflow is set to scroll, Webflow forces scrollbars to appear even if the content doesn't need scrolling.
• If your container has fixed height or width and extra padding or margin, it might push inner content too far and create unwanted spacing.
• Inspect your div’s padding—especially on the parent and child elements. Even 100% height/width settings can overflow if box-sizing isn't adjusted.

2. Inspect Box Sizing

• Webflow uses box-sizing: border-box by default, but custom code or styles might override this.
• If box-sizing is set to content-box, padding and borders are added on top of width/height, causing unexpected overflow.

3. Watch for Negative Margins or Absolute Children

• Inside your scrollable div, an element with negative margins or an absolute/fixed position may stretch content unexpectedly.
• Absolute elements won’t participate in the scroll layout and can bleed outside their container.

4. Confirm Scroll Direction

• If you enable overflow: scroll in both directions (X and Y) and don’t set proper width/height, it may reserve space unnecessarily.
• You may get extra white space if content height is taller than expected or no content is forcing the scroll but the scrollspace is reserved anyway.

5. Display Settings and Nesting

• Using Flexbox or Grid incorrectly, especially with nested divs, can lead to layout collapse or stretching that causes white space.
• Check your scrollable div’s Display setting from the Style panel—don’t force height via margin/padding only.

6. Scrollbar Width (Browser Default)

• Scrollbars themselves take up space. On Windows, vertical scrollbars are wider and might push horizontal content, leading to a “white bar” on the side.
• On MacOS, scrollbars are overlayed by default, so the issue may only appear on certain operating systems.

7. Custom Code or Embed Blocks

• If you're using any custom HTML embed or injected CSS, inspect it for layout-related styles (e.g., unintended 100vw, fixed px widths, etc.).
• A <div> with width: 100vw inside a padded parent can overflow and push layout, resulting in unexpected scrollbars or borders.

8. Preview Mode vs Published Site

• Webflow's Designer Preview can display scroll areas differently than the published site.
• Always test on the live site to confirm if the white space appears there too.

Summary

The white border is usually caused by fixed sizes, extra padding/margin, flex/grid misconfiguration, or scrollbars consuming space on certain OS/browser setups. Double-check the scrollable div's size, padding, content alignment, and how scrollbars are rendered across devices.