What could be causing my homepage to appear wider than the screen size on the published Webflow site, resulting in a horizontal scrollbar, even though all elements are set to 100vw?

Your homepage appearing wider than the screen and causing a horizontal scrollbar in Webflow is likely due to elements exceeding the viewport width, despite seeming to be set at 100vw. Here's how to diagnose and fix it.

1. Check for Overflowing Elements

• Elements set to 100vw can unintentionally cause overflow if they have padding or margin applied.
• 100vw does not account for the width of the browser's scrollbar, which can add extra width and cause the page to overflow.
• Use calc(100vw - [scrollbar width]) (e.g., calc(100vw - 17px)) if you must use vw-based widths with padding.

2. Scan for Fixed-Width or Large Elements

• Inspect your page in Webflow Designer and look for:
• Elements with fixed pixel widths wider than the screen.
• Absolute or fixed-positioned elements positioned off-canvas or with negative margins.
• Long unbroken content like URLs or long words inside text blocks with no word wrap.

3. Check for Scroll Effects or Transforms

• Elements with scroll-based interactions, movement, or transforms can shift out of the viewport.
• Unintended animation offsets (e.g., move by +100px on X-axis) can cause overflow when not managed properly.

4. Use the Overflow Hidden Technique

• Set an outermost wrapper (e.g., the Body or a main Section) to overflow: hidden:
• Select the Body or main Wrapper Div.
• In the Style Panel, scroll to Overflow, and set to Hidden on the X-axis or Both.

5. Use Webflow’s Preview and Dev Tools

• Use Preview mode to catch overflow issues visually.
• In Chrome DevTools:
• Open Inspect Element and select the Elements tab.
• Use the Layout tab to toggle the "Show Scrollbars" and "Display Layout Shift Regions".
• Scroll horizontally to identify which element is overflowing.

Summary

This issue is usually caused by an element extending beyond the viewport due to improper use of 100vw, fixed widths, transforms, or unwrapped content. Use DevTools and Webflow preview mode to identify and resolve the element. Consider setting overflow: hidden on a parent container when necessary.