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Reviewing the starter code

Before we start adding code, let's review the sample article.amp.html page, which should be as follows:

<!doctype html>
<html  lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1">

    <link rel="canonical" href="/article.html">
    <link rel="shortcut icon" href="amp_favicon.png">

    <title>News Article</title>

    <style amp-boilerplate>body{-webkit-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-moz-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-ms-animation:-amp-start 8s steps(1,end) 0s 1 normal both;animation:-amp-start 8s steps(1,end) 0s 1 normal both}@-webkit-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-moz-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-ms-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-o-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}</style><noscript><style amp-boilerplate>body{-webkit-animation:none;-moz-animation:none;-ms-animation:none;animation:none}</style></noscript>
    <style amp-custom>
      body {
        width: auto;
        margin: 0;
        padding: 0;
      }

      header {
        background: tomato;
        color: white;
        font-size: 2em;
        text-align: center;
      }

      h1 {
        margin: 0;
        padding: 0.5em;
        background: white;
        box-shadow: 0px 3px 5px grey;
      }

      p {
        padding: 0.5em;
        margin: 0.5em;
      }
    </style>
    <script async src="https://cdn.ampproject.org/v0.js"></script>
    <script type="application/ld+json">
    {
     "@context": "http://schema.org",
     "@type": "NewsArticle",
     "mainEntityOfPage":{
       "@type":"WebPage",
       "@id":"https://example.com/my-article.html"
     },
     "headline": "My First AMP Article",
     "image": {
       "@type": "ImageObject",
       "url": "https://example.com/article_thumbnail1.jpg",
       "height": 800,
       "width": 800
     },
     "datePublished": "2015-02-05T08:00:00+08:00",
     "dateModified": "2015-02-05T09:20:00+08:00",
     "author": {
       "@type": "Person",
       "name": "John Doe"
     },
     "publisher": {
       "@type": "Organization",
       "name": "⚡ AMP Times",
       "logo": {
         "@type": "ImageObject",
         "url": "https://example.com/amptimes_logo.jpg",
         "width": 600,
         "height": 60
       }
     },
     "description": "My first experience in an AMPlified world"
    }
    </script>
  </head>
  <body>
    <header>
      News Site
    </header>
    <article>
      <h1>Article Name</h1>

      <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam egestas tortor sapien, non tristique ligula accumsan eu.</p>

      <amp-img src="mountains.jpg" layout="responsive" width="266" height="150"></amp-img>
    </article>
  </body>
</html>

This is a simple AMP page that passes both AMP validation and the schema.org structured data validation. If this page were deployed on a news website, users can discover the page through rich experiences in Search Engine Result Pages (e.g., the Top stories carousel in Google Search).

Enabling AMP Validator

Before we alter the page, let's enable the AMP validator so that we know we are working with valid AMP HTML. Add this fragment identifier to your URL:

#development=1

For example:

http://localhost:8000/article.amp.html#development=1

Open the Developer Console in Chrome (or your preferred browser), and verify there are no AMP errors.

You can use several other tools to validate your AMP page, like:

Learn more in the Validate AMP pages guide.

Simulated on a Nexus 5X device

Simulating the mobile experience

We're designing this page for a mobile device, so let's simulate the mobile device experience in your browser's developer tools. For example, in Chrome DevTools, click the mobile phone icon, and select a mobile device from the menu.

Now, we can start working on the page itself. Let’s add some AMP components to our page.