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Easier AMP development with the new AMP Optimizer

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Creating AMP pages has just gotten a lot simpler with the new AMP Optimizer 2.0. 

The primary goal of AMP Optimizer is to make AMP pages load even faster by applying additional server-side optimizations. With this release, AMP Optimizer also makes it a lot simpler to integrate AMP into frameworks and CMSs! For example, we’ve just released an AMP plugin for the wonderful static site generator Eleventy that makes use of all these new features. 

But first let’s take a quick look at what’s new in AMP Optimizer 2.0:

  1. Auto AMP component script import. 
  2. Auto add any missing mandatory AMP tags.
  3. New Markdown support via <img> tag to <amp-img> conversion.
  4. CSP tag generation for inline amp-scripts.
  5. Built-in HTML minification removing unneeded whitespace (this includes AMP specific optimizations such as removing whitespace from inline JSON and minifying inline amp-scripts using terser).
  6. AMP server-side-rendering now supports the intrinsic layout. This means AMP Optimizer can remove the AMP boilerplate for pages using the intrinsic layout resulting in much faster load times.
  7. Transformations run 40% faster by switching from parse5 to htmlparser2!

Now, let’s talk about the first three features and how they simplify building AMP pages and integrating AMP into Frameworks and CMSs.

Auto AMP component extension import

Auto AMP component import means that AMP Optimizer will analyze the DOM for any used AMP components and will automatically inject all needed scripts imports into the head.

For example, if it encounters the following tag:

<amp-video src="video.mp4" width="300" height="200"></amp-video>

It will automatically add the amp-video script extension import:

<script async custom-element="amp-video" src="https://cdn.ampproject.org/v0/amp-video-0.1.js"></script>

This works also for AMP components which don’t require a specific tag:

<div amp-fx="fade-in">I will fade in</div>

In this case, the presence of the amp-fx attribute will trigger the import of the amp-fx-collection script:

<script async custom-element="amp-fx-collection" src="https://cdn.ampproject.org/v0/amp-fx-collection-0.1.js"></script>

This is pretty awesome, because many AMP features are now super straightforward to use and no longer require you to go to the AMP docs and copy/paste the script import. We’re expecting to see a significant drop in amp.dev traffic once this feature has been widely adopted!

Auto add any missing mandatory AMP tags.

The other piece of the puzzle for how AMP Optimizer improves developer experience is the ability to add any missing mandatory AMP tags. For example, given the following HTML fragment:

<html> <head> <title>My Page</title> <link rel="canonical" href="/mypage.html" /> </head> <body> <h1>Hello World!</h1> </body>

AMP Optimizer will automatically add all the mandatory tags and attributes needed to turn this into a valid AMP page:

<!doctype html> <html > <head> <meta charset="utf-8"> <title>My Page</title> <link rel="canonical" href="/mypage.html" /> <meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1"> <style amp-boilerplate>...</noscript> <script async src="https://cdn.ampproject.org/v0.js"></script> </head> <body> <h1>Hello World!</h1> </body> </html>

This means, you don’t need to include any AMP specific markup in your layout templates when using AMP Optimizer. Together with auto component import, creating AMP pages becomes as easy as using built in HTML tags.

Working towards improved AMP support for Frameworks and CMSs 

This AMP Optimizer release is the first stepping stone in offering better AMP support in frameworks and CMS platforms. 

Next.js already offers great AMP support and has AMP Optimizer already built in. This means that with this AMP Optimizer release (available in Next.js v9.2.2), creating AMP pages in Next.js has become even easier. You can now directly use AMP components (in this case amp-fx-collection):

export const config = {amp: true}; export default () => ( <div amp-fx='fade-in'>I will fade-in</div> );

Without having to explicitly import the amp-fx-collection-.0.1.js component script via the <Head>:

import Head from 'next/head' export const config = {amp: true}; export default () => ( <> <Head> <script async key="amp-fx-collection" custom-element="amp-fx-collection" src="https://cdn.ampproject.org/v0/amp-fx-collection-0.1.js" /> </Head> <div amp-fx='fade-in'>I will fade-in</div> </> );

Markdown Support

This AMP Optimizer release adds a new markdown mode, which will convert <img> tags into <amp-img> or <amp-anim> tags (all other Markdown features are already supported by AMP).

This enables the following conversion flow:

README.md => HTML => AMP Optimizer => valid AMP

Combined with automatically AMP component script import and automatically adding missing mandatory AMP tags it’s now possible to directly convert markdown into valid AMP:

const AmpOptimizer = require('@ampproject/toolbox-optimizer'); const md = require('markdown-it')({ // don't sanitize html if you want to support AMP components in Markdown html: true, }); // enable markdown mode const ampOptimizer = AmpOptimizer.create({ markdown: true, }); const markdown = ` # Markdown Here is an image declared in Markdown syntax: ![A random image](https://unsplash.it/800/600). You can directly declare AMP components: <amp-twitter width="375" height="472" layout="responsive" data-tweetid="1182321926473162752"> </amp-twitter> Any missing extensions will be automatically imported. `; const html = md.render(markdown); // valid AMP! const amphtml = await ampOptimizer.transformHtml(html, { canonical: filePath, });

Summary

Every website publishing AMP pages should use AMP Optimizer to benefit from the performance improvements of up to 50% faster rendering times. The best part: performance will automatically get better over time with every new server-side optimization that is released. 
The new features introduced with this release greatly improve the AMP developer experience. Using AMP components becomes as straightforward as using any other HTML tag. But this is only the first step and we plan to build upon this in the future and bring AMP support to more frameworks and CMS Stay tuned to the AMP Blog and follow @AMPhtml on Twitter for any future news on the AMP Optimizer.

Written by Sebastian Benz, Developer Programs Engineer, AMP Project, Google

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