How can I resolve the issue with the slider mask in Webflow, where it is currently taking the height of the tallest slide and causing empty space in certain slides? I have tried using the CMS feature for the slider, but it is not available yet. I also tried using the finsweet CMS slider, but the height issue still exists.

You're encountering an issue where the Webflow slider mask takes the height of the tallest slide, which causes unwanted empty space on shorter slides. This is a known behavior since the native Webflow slider doesn’t auto-resize per slide content.

1. Understand Why the Issue Happens

• The slider mask uses the height of the tallest slide to avoid layout shifts during transitions.
• This is intentional behavior, but unfortunately it creates excess white space for shorter slides.
• Because Webflow does not yet support dynamic height sliders or native CMS sliders, even third-party solutions like Finsweet’s CMS Slider inherit these limitations.

2. Use JavaScript to Dynamically Adjust Slider Height

To fix the height issue, inject a small snippet of custom JavaScript to adjust the mask height based on the active slide.

• Add an HTML Embed in the Page Footer or inside the slider.
• Use code that:
• Selects the active slide.
• Measures its height.
• Applies that value to the mask as an inline style.

Here’s how to configure it:

• Give the slider mask a unique class like slider-mask.
• Assign each slide a class like slider-slide.
• Use w-slider-dot or w-slider-nav click events (or slidechange) to trigger the resize logic.

Example (not raw code): A script that listens for slidechanged and sets the .slider-mask height using offsetHeight of the active .w-slide.

Webflow doesn't allow code execution in the Designer, so test this in preview or live.

3. Set Slides to Auto Height

Inside Webflow Designer:

• Select each slide (.w-slide) and set its height to Auto.
• Ensure the slider mask has height: Auto, and remove any fixed height or min-height.
• Also verify overflow: hidden is enabled on the mask.

4. Consider Cloning Prebuilt Dynamic Height Sliders

If you're not comfortable with custom code:

• Finsweet offers a CMS Slider Cloneable with dynamic height logic you can modify.
• Alternatively, search Webflow Showcase for sliders with “Auto Height” or “Dynamic Height”.

These cloneables often include JavaScript that auto-resizes the slider mask.

Summary

The Webflow native slider uses the tallest slide’s height, creating extra space on shorter slides. Use custom JavaScript to dynamically set the mask height based on the current slide, and ensure all relevant elements (mask, slides) are set to height: auto. Cloneable community sliders can also offer prebuilt solutions.