index.html

---js
// Same condition used for copying guidelines assets in eleventy.config.ts
const includeGuidelines = process.env.COMMIT_REF && !process.env.WCAG_MODE;
const repoUrl = process.env.REPOSITORY_URL;
const prNumber = process.env.REVIEW_ID;
---
<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8"/>
		<title>Web Content Accessibility Guidelines {{ versionDecimal }}</title>
	</head>
	<body>
		<h1>Web Content Accessibility Guidelines {{ versionDecimal }}</h1>
    {% if repoUrl and prNumber -%}
    <p>
      <strong>Note:</strong> This is a <strong>preview</strong> for
      <a href="{{ repoUrl }}/pull/{{ prNumber }}">PR #{{ prNumber }}</a>.
    </p>
    {%- endif %}
		<ul>
      {% if includeGuidelines -%}
        <li><a href="guidelines/">Guidelines</a></li>
      {%- endif %}
			<li><a href="techniques/">Techniques</a></li>
			<li><a href="understanding/">Understanding Docs</a></li>
		</ul>
	</body>
</html>