How to Display Full Page Overlay on Page Load in Shopify or WordPress Website

How to Display Full Page Overlay on Page Load in Shopify or WordPress Website

Why Use a Full-Page Overlay on Page Load? 🎯

A full-page overlay is a powerful tool to capture visitor attention immediately when they land on your website. Whether you want to:

Promote a sale or discount 🛍️

Collect email leads ✉️

Show a welcome message 👋

Highlight important announcements 📢

An overlay ensures your message is seen before users navigate away.

Benefits of Using a Full-Page Overlay ✅

✔ Higher Conversion Rates – Immediate visibility boosts sign-ups & sales.

✔ Better Engagement – Grabs attention before users scroll.

✔ Flexible Customization – Works for popups, age verification, or announcements.

✔ Easy to Implement – Simple code or plugin solutions.

How to Add a Full-Page Overlay in Shopify 🛒

Method 1: Using Custom HTML/CSS & JavaScript

<style>  

  #fullpage-overlay {  

    position: fixed;  

    top: 0;  

    left: 0;  

    width: 100%;  

    height: 100%;  

    background: rgba(0,0,0,0.8);  

    display: flex;  

    justify-content: center;  

    align-items: center;  

    z-index: 9999;  

  }  

  #overlay-content {

    background: white;  

    padding: 20px;  

    border-radius: 10px;  

    text-align: center;  

  }  

</style>  

<div id=”fullpage-overlay”>  

  <div id=”overlay-content”>  

    <h2>Welcome! 🎉</h2>  

    <p>Get 10% off your first order!</p>  

    <button onclick=”closeOverlay()”>Close</button>  

  </div>  

</div>  

<script>  

  function closeOverlay() {  

    document.getElementById(‘fullpage-overlay’).style.display = ‘none’;  

  }  

  // Optional: Auto-show on page load  

  window.onload = function() {  

    document.getElementById(‘fullpage-overlay’).style.display = ‘flex’;  

  };  

</script>  

Steps:

Go to Shopify Admin → Themes → Edit Code → theme.liquid

Paste the code before the </body> tag.

Save & preview!

Method 2: Using Shopify Apps (No Coding)

Popup Maker

Privy

OptinMonster

How to Add a Full-Page Overlay in WordPress 🖥️

Method 1: Using a Plugin (Easy)

Install “Elementor Popups” or “Popup Builder”.

Create a new popup & set trigger to “On Page Load”.

Customize design & save!

Method 2: Custom Code (Advanced)

Add this to your header.php or via Custom HTML Widget:

<div id="fullpage-overlay">Your Content Here</div>  

(Use similar CSS/JS as the Shopify example.)

🎥 Video Tutorial (Step-by-Step Guide)

🔗 Watch Here 

Best Practices for Overlays ✨

Keep it simple – Don’t overload with too much info.

Add a clear CTA – “Sign Up,” “Shop Now,” or “Close.”

Mobile-friendly – Test on all devices.

Use cookies – Don’t show repeatedly to the same user.

Final Thoughts 💡

A full-page overlay is a fantastic way to increase conversions and engage visitors right when they arrive. Whether you use Shopify or WordPress, implementing it is quick and effective!