How can I ensure the blur effect in Webflow covers the entire div when using CSS styles like the one shown below?

To ensure a blur effect (backdrop-filter: blur) in Webflow covers the entire div, you need to correctly configure positioning, background, and size styles. Here's how to do it:

1. Set the Blur Effect on the Right Element

• Blur only works with the backdrop-filter property, which affects content behind the element.
• Apply backdrop-filter: blur(…) or use Webflow’s "Backdrop Blur" under Effects > Blur in the Style panel.
• Ensure this style is applied to a transparent element layered on top of the area you want blurred.

2. Ensure Parent and Child Element Are Positioned Correctly

• Set the parent container to position: relative to allow absolute positioning of the blur layer.
• Set the blur layer (usually a div) to position: absolute, with these values:
• Top: 0
• Left: 0
• Width: 100%
• Height: 100%

3. Make Sure Blur Layer Has Background and Transparency

• Set background-color with transparency, for example: rgba(255, 255, 255, 0.1).
• Without a semi-transparent background, you'll see no visual blur effect.

4. Confirm Browser Support and Publish Site

• Backdrop-filter isn’t fully supported in older browsers (such as Internet Explorer).
• You must publish your Webflow site to see the effect in action—blur doesn’t always render correctly in the Webflow Designer preview.

5. Avoid Overflows and Clip Issues

• Ensure no ancestor elements have overflow: hidden or clip, which can prevent the blur layer from fully displaying.
• If clip or overflow must be used, make sure the blur div is confined appropriately.

Summary

To fully cover a div with a blur effect in Webflow, use an absolutely positioned, transparent overlay with backdrop-filter: blur, and ensure all container styles allow proper rendering. Use a semi-transparent background color and test on the live published site for accurate results.