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What does 'AMP Style and Layout Error' mean in Site Audit?

AMP Style and Layout Error

Description

This AMP page contains style or layout errors that may affect rendering.

How to Fix

Fix the style and layout issues according to the AMP specification.

Detailed Analysis

AMP (Accelerated Mobile Pages) is a framework designed to create fast-loading mobile web pages. An AMP style and layout error indicates that there are issues with the styles or layout of the AMP page that could negatively impact how it renders. Let’s break down this issue in detail:

  1. What Causes This Issue:

    • Invalid CSS: AMP has strict limitations on CSS, such as a maximum size of 75KB. Non-compliant or overly complex CSS can lead to errors.
    • Non-Allowed Styles: AMP supports only a subset of CSS styles. Using styles or properties that are not supported by AMP will cause errors.
    • Use of Inline Styles: AMP does not allow inline styles to ensure better performance and maintainability.
    • Incorrect Layout Attributes: AMP components often require specific layout attributes. Incorrect or missing attributes can lead to rendering issues.
    • JavaScript Restrictions: AMP pages cannot include custom JavaScript, which means any reliance on JavaScript for layout adjustments can cause issues.

  2. Why It’s Important:

    • Rendering Issues: Errors in style and layout can lead to improper rendering of the page, affecting user experience negatively.
    • Page Speed: AMP is designed to be fast. Errors can slow down the page load time, defeating the purpose of AMP.
    • SEO Impact: Poor rendering and slow page speeds can lead to higher bounce rates and lower rankings in search engine results, as Google considers page speed and user experience as ranking factors.
    • Validation Failure: AMP pages must pass validation to be eligible for certain features in Google search, such as AMP carousel, which can boost visibility.

  3. Best Practices to Prevent It:

    • Follow AMP CSS Guidelines: Use only permitted CSS properties and ensure the total CSS size remains under 75KB.
    • Use AMP Components Correctly: Utilize AMP’s pre-defined components (e.g., <amp-img>, <amp-video>) with proper layout attributes.
    • Validate Your AMP Pages: Use the AMP Validator tool to test your pages for compliance.
    • Avoid Inline Styles: Place all styles within the <style amp-custom> tag in the document’s head section.
    • Minimize Styling Complexity: Simplify CSS rules and avoid complex selectors that may increase file size or processing time.

  4. Examples of Good and Bad Cases:

    Bad Case:

    <!doctype html>
<html ⚡>
<head>
  <meta charset="utf-8">
  <style amp-custom>
    body { font-size: 16px; color: #333; }
    .container { max-width: 600px; margin: 0 auto; }
    /* Too complex and long CSS */
    .item { ... } /* and many more complex rules leading to excessive CSS size */
  </style>
</head>
<body>
  <div class="container" style="background-color: #f0f0f0;"> <!-- Inline styles not allowed -->
    <h1>Page Title</h1>
    <div class="content">Content goes here.</div>
  </div>
</body>
</html>

    Good Case:

    <!doctype html>
<html ⚡>
<head>
  <meta charset="utf-8">
  <link rel="canonical" href="self.html">
  <meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1">
  <style amp-custom>
    body { font-size: 16px; color: #333; }
    .container { max-width: 600px; margin: 0 auto; background-color: #f0f0f0; }
  </style>
  <script async src="https://cdn.ampproject.org/v0.js"></script>
</head>
<body>
  <div class="container">
    <h1>Page Title</h1>
    <div class="content">Content goes here.</div>
  </div>
</body>
</html>

By adhering to AMP guidelines and best practices, you can ensure your pages load quickly and render correctly, thereby enhancing both user experience and SEO performance.

Updated about 5 hours ago