Introduction
If you have ever visited a website and tried to click a button, but suddenly the page moved and you clicked something else — that is called a layout shift. This is one of the most common problems in modern web development, especially in fast-growing digital markets like India (Noida, Ghaziabad, Delhi NCR, Bengaluru).
Layout shift directly impacts user experience (UX), website performance, and even Google search rankings, because it is a part of Core Web Vitals.
In this detailed guide, you will learn how to fix layout shift issues in web pages step by step, using simple language, real-life examples, and practical solutions.
What is Layout Shift in Web Development?
Layout shift happens when elements on a web page move unexpectedly while the page is loading.
In technical terms, it is measured as Cumulative Layout Shift (CLS) — one of Google’s Core Web Vitals metrics.
Simple Example
This is a layout shift.
Why Layout Shift is Bad for UX and SEO
Layout shift is not just annoying — it can seriously affect your website.
Impact on User Experience
Impact on SEO (Google Ranking)
Google considers CLS as a ranking factor.
This is especially important for websites targeting Indian users and local search traffic.
Common Causes of Layout Shift
Understanding the root cause is the first step to fixing layout shift issues.
1. Images Without Dimensions
If you do not define width and height for images, the browser does not know how much space to reserve.
2. Ads and Embedded Content
Ads, iframes, or videos load later and push content down.
3. Fonts Loading Late (FOIT/FOUT)
Custom fonts may load after the text is displayed, causing shifts.
4. Dynamic Content Injection
Content added via JavaScript (like banners or popups) can move existing elements.
5. Buttons and Components Loading Late
Late-loading UI components can shift layout.
How to Fix Layout Shift Issues
Now let’s go through practical solutions used by frontend developers in real-world projects.
Step 1: Always Set Width and Height for Images
This is one of the easiest and most effective fixes.
Example:
<img src="image.jpg" width="300" height="200" />
Why it works
The browser reserves space before the image loads, preventing movement.
Real-world tip
Always define image dimensions in responsive websites for better UX.
Step 2: Use CSS Aspect Ratio
Modern CSS allows you to maintain layout using aspect ratio.
.image-container {
aspect-ratio: 16 / 9;
}
Benefit
Even before content loads, space is reserved.
Step 3: Reserve Space for Ads and Embeds
Ads are a major cause of layout shift.
Solution
Example:
<div style="width:300px; height:250px"></div>
This prevents sudden jumps.
Step 4: Avoid Inserting Content Above Existing Content
Adding content above existing elements causes everything to move down.
Better Approach
Step 5: Optimize Font Loading
Fonts can cause layout shifts when they load late.
Solution
Use:
font-display: swap;
Why it helps
Text appears immediately using fallback fonts, reducing shifts.
Step 6: Use Skeleton Screens or Placeholders
Instead of leaving blank space, show placeholders.
Example:
Grey boxes for images
Loading skeleton UI
Benefit
Users see stable layout while content loads.
Step 7: Avoid Animations That Change Layout
Animations that change size or position can cause layout shifts.
Use Instead
These do not affect layout flow.
Step 8: Preload Important Resources
Load critical resources early.
Example:
<link rel="preload" href="font.woff2" as="font" type="font/woff2" crossorigin>
Benefit
Reduces delay and layout shifts.
Step 9: Test Using Google Tools
Use tools like:
Check CLS score and fix issues accordingly.
Real-Life Example
Imagine an e-commerce website in India:
Before Fix:
Product images load late
Buy button shifts
User clicks wrong item
After Fix:
Images have fixed size
Layout stable
Better conversion rate
Before vs After Fixing Layout Shift
Before:
Unstable UI
Poor user experience
High bounce rate
After:
Stable design
Smooth interaction
Better SEO ranking
When Should You Focus on Layout Shift?
Always focus on layout shift when:
Building responsive websites
Creating e-commerce platforms
Developing mobile-first applications
Advantages of Fixing Layout Shift
Better user experience
Higher SEO rankings
Increased engagement
Improved trust
Disadvantages (If Ignored)
Poor UX
Lower rankings
User frustration
Common Mistakes to Avoid
Summary
Layout shift is a common issue in web development that negatively impacts user experience and SEO performance. By following best practices like setting image dimensions, reserving space for ads, optimizing font loading, and using placeholders, you can create stable and smooth web pages. Fixing layout shift not only improves usability but also boosts Google rankings, making it a critical step in modern frontend development.