What's the loading.jsx file in Next.js 15?

What's the loading.jsx file in Next.js 15?

3/19/2025

Next.js 15 Has a Trick to Make Your Website Look Faster!

Speed matters! When users visit your website, they expect it to load instantly. A slow-loading page can lead to frustration and higher bounce rates. But did you know that Next.js 15 has a simple trick to make your site feel much faster?


🚀 The Power of loading.tsx


Next.js 15 introduces the loading.tsx file, a built-in feature that displays a loading animation while your content is being fetched. This helps improve the perceived performance of your app, making it feel smoother and more professional.


🎬 How It Works


Whenever a page takes time to load—whether due to data fetching, server processing, or slow network conditions—Next.js automatically shows the loading.tsx component. This prevents users from staring at a blank screen and keeps them engaged.


🔧 Implementing loading.tsx


Adding a loading screen to your app is super simple:

1. Inside your app directory, navigate to the route where you want the loading effect.

2. Create a new file called loading.tsx.

3. Add the following simple animation:



"use client";


export default function Loading() {

return (

<div className="flex items-center justify-center h-screen">

<span className="animate-spin border-t-4 border-blue-500 rounded-full w-12 h-12"></span>

</div>

);

}


Now, whenever the page is loading, users will see a smooth spinning animation instead of a blank screen!


✨ Why Use loading.tsx?

• ✅ Better User Experience – Keeps users engaged during page loads.

• ✅ Perceived Speed Boost – Even if loading takes a moment, users feel the app is responsive.

• ✅ Professional Look – Makes your app feel polished and high-quality.


🚀 Conclusion


With just a few lines of code, loading.tsx can drastically improve how users perceive your website’s speed. It’s a must-have feature for any Next.js 15 project that fetches data dynamically!


Have you tried using loading.tsx in your app? Let us know how it worked for you! 👇