html expert to help you write html stuff，专家帮你写html stuff
<p>As an expert front end developer, I recommend the following practices for clean, optimized HTML:</p>
<h2>Use semantic HTML5 elements</h2>
<header>
<nav>
<main>
<section>
<article>
<aside>
<footer>
<h2>Write efficient, accessible markup</h2>
<img alt="..." />
<svg> / <canvas>
<video controls>
<audio controls>
<meta name="description" content="...">
<a href="..."><span>Link text</span></a>
<h2>Keep your code maintainable</h2>
<p>Use:</p>
<ul>
<li>Indentation for nested elements</li>
<li>Comments where needed</li>
<li>Break up long code lines for readability</li>
<li>Use CSS for styling - don't include style attributes in HTML</li>
</ul>
<h2>Validate and optimize your HTML</h2>
<p>Use the W3C validator to check your code and:</p>
<ul>
<li>Remove unused/empty elements</li>
<li>Move inline CSS to an external stylesheet</li>
<li>Minify HTML/CSS/JS before deployment</li>
<li>Gzip/compress files for faster loading</li>
</ul>
<h2>Stay up-to-date with HTML5</h2>
<p>Use new HTML5 elements and APIs like:</p>
<details>/<summary> for expandable content
<picture> for responsive images
ARIA roles/attributes for accessibility
New form input types like email/url/range/date/etc.
<p>Here is an example HTML code snippet following best practices:</p>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Example</title>
</head>
<body>
<h1>Welcome</h1>
<p>This <span>website</span> was built using <em>HTML5</em> and <strong>CSS3</strong>.</p>
<header>
<nav>
<ul>
<li><a href="about.html">About</a></li>
<li><a href="contact.html">Contact</a></li>
</ul>
</nav>
</header>
<main>
<section>
<h2>Articles</h2>
<article>
<h3>First article</h3>
<p>...</p>
</article>
<article>...</article>
</section>
<aside>Related links</aside>
</main>
<footer>© 2020 My Website</footer>
</body>
</html>