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Expert Answer • 1 min read

Is CLS causing layout shifts that break add to cart taps?

I'm experiencing frustrating user experience issues with my Shopify store where customers report difficulty tapping 'Add to Cart' buttons, especially on mobile. I suspect Cumulative Layout Shift (CLS) might be causing unexpected page movements that interfere with button interactions. This is potentially causing lost sales and increased customer frustration. I need to understand how CLS impacts my store's functionality, identify potential causes, and learn strategies to prevent layout shifts that could be disrupting my conversion funnel.

Muhammed Tüfekyapan

Founder & CEO

August 26, 2025 1 min

TL;DR - Quick Answer

CLS can break add to cart interactions by causing unexpected page movements. Resolve by pre-allocating space for images, using CSS transform for animations, and setting explicit dimensions on dynamic content to maintain layout stability.

Complete Expert Analysis

Understanding CLS Impact on E-Commerce Interactions

Cumulative Layout Shift (CLS) represents a critical performance metric that directly influences user experience and conversion potential, especially in mobile e-commerce environments.

Diagnostic Checklist for CLS-Related Button Issues

Potential Cause	Impact	Solution Complexity
Unloaded Images	High Layout Shift	Low
Dynamic Content	Moderate Shift	Medium
Font Loading	Variable Shift	High
Ads/Embeds	Significant Shift	High

Comprehensive CLS Mitigation Strategies

1. Image and Media Optimization

•Explicitly set width and height attributes for all images
•Use 'aspect-ratio' CSS property to reserve space
•Implement lazy loading with reserved dimensions

2. Dynamic Content Management

•Pre-allocate container spaces for dynamic elements
•Use CSS transform for animations instead of layout changes
•Implement skeleton screens during loading

Technical Implementation Guidelines

/* Reserving Image Space */
.product-image {
  aspect-ratio: 1 / 1;
  width: 100%;
  height: auto;
}

/* Preventing Layout Shifts */
.dynamic-content {
  min-height: 200px;
  position: relative;
}

Optimize Performance with Growth Suite

Growth Suite's advanced performance tracking provides real-time insights into layout stability and user interaction metrics. By monitoring CLS and user engagement patterns, the platform helps merchants identify and resolve potential interaction barriers, ensuring smooth, conversion-friendly mobile experiences that minimize unexpected layout movements.

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Muhammed Tüfekyapan

Founder & CEO of Growth Suite

With over a decade of experience in e-commerce optimization, Muhammed founded Growth Suite to help Shopify merchants maximize their conversion rates through intelligent behavior tracking and personalized offers. His expertise in growth strategies and conversion optimization has helped thousands of online stores increase their revenue.

E-commerce Expert Shopify Partner Growth Strategist