This content originally appeared on DEV Community and was authored by Pawar Shivam
The most visible part of your UI might be hurting your performance and SEO.
☐ Your Hero Section Looks Good — But Is It Slowing Your Page?
Most landing pages start with a large hero section.
<section class="hero">
<img src="hero.jpg" alt="Landing hero">
</section>
It looks great.
But this element is often your Largest Contentful Paint (LCP).
☐ What Is LCP (And Why It Matters)
LCP measures how fast the largest visible element loads on your screen.
Usually it is:
• hero image
• large heading
• banner section
If this loads late → your page feels slow.
And yes, it directly affects SEO rankings via Google.
☐ The Common Mistake
Many developers do this:
<img src="hero.jpg" loading="lazy">
This is wrong for hero sections.
Why?
Because lazy loading delays the most important content.
☐ Another Hidden Problem
Using CSS background images:
.hero {
background-image: url(hero.jpg);
}
Browsers cannot prioritize this properly for LCP.
So your main content loads late.
☐ The Better Approach
Use optimized images and prioritize them:
<link rel="preload" as="image" href="hero.webp">
<img
src="hero.webp"
alt="Hero image"
width="1200"
height="600"
>
This ensures:
• faster loading
• better LCP score
• improved UX
☐ What Most Developers Miss
The hero section is not just design.
It is:
• first impression
• biggest element
• performance bottleneck
Bad hero = bad LCP.
☐ Real UI Rule
If it’s above the fold:
👉 Do NOT lazy load it
👉 Optimize it
👉 Prioritize it
☐ Demo Idea
Try testing your site in:
• Lighthouse
• Chrome DevTools
Check which element is your LCP.
You might be surprised.
Good UI is not just about how it looks.
It’s about how fast users can see it.
This content originally appeared on DEV Community and was authored by Pawar Shivam
Pawar Shivam | Sciencx (2026-03-19T17:03:40+00:00) Why Your Hero Section Is Killing LCP. Retrieved from https://www.scien.cx/2026/03/19/why-your-hero-section-is-killing-lcp/
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