Welcome to Blogvent, day 19!

Did you know that Next.js supports AMP out of the box? Here's how you can build with it!

What is AMP?

AMP stands for Accelerated Mobile Pages. It's an open source framework developed originally by Google, optimized for mobile web browsing, to help webpages load faster. It works by:

• Executing AMP JavaScript asynchronously
• Statically sizing resources like images, ads, and iframes
• Stopping extensions from blocking page rendering
• Only allowing third-party JavaScript in sandboxed framers
• Only allowing inline CSS + minimizing style recalculations
• Only running GPU-accelerated animations
• Controlling all resource downloads
• Using the preconnect API to pre-render a page before a user navigates to it

How do I add it to my Next.js application?

Add the following line to your page component:

export const config = { amp: true }

This enables AMP for your page! That amp property can be either true or 'hybrid'. When it's true, that means your page will be AMP-only, and if it's 'hybrid' the page will have both an AMP version and an HTML version.

AMP-only pages

AMP-only pages will have no React code run client-side, and AMP Optimizer is automatically applied to it.

Hybrid AMP

In this mode, you can use the useAmp() hook by importing it at the top of your page:

// at the top
import { useAmp } from 'next/amp'

// in your component
let isAmp = useAmp() // returns true or false

With this, you can return AMP components or HTML based on if isAmp is true or false.

As for the AMP components you can use on the page, in both modes, they're built in! Use a component from the AMP Component Catalogue and Next.js will detect it and automatically import it for you.

Caveats

You do get all the benefits mentioned above when using AMP in your Next.js projects, but there are two things you can't use currently:

• CSS Modules - You can only use CSS-in-JS libraries with AMP pages.
• TypeScript - AMP doesn't have built in types for TypeScript yet.

These things are actively being worked on at the time of writing, but as of right now you cannot use these.

I'd like to build something with Next.js + AMP!

Heck yeah! Here's a starter application to try this out yourself:

(Clicking this button will deploy a Next.js starter project to Netlify, and clone it to your chosen Git provider)

You can also read more about AMP here!