Modern HTML Patterns
Apply HTML knowledge to build maintainable, accessible, SEO-friendly modern pages.
Reusable HTML Structures
Even without a frontend framework, HTML can be organized into reusable conceptual components such as navigation, cards, forms, articles, and footers. Good component boundaries should follow meaningful content or behavior rather than arbitrary wrapper elements.
<article class="card">\n <img src="course.jpg" alt="HTML course cover">\n <div class="card-content">\n <h2>HTML Mastery</h2>\n <p>Learn modern HTML from fundamentals to advanced topics.</p>\n <a href="/courses/html">View course</a>\n </div>\n</article>- Choose structural boundaries based on semantics and behavior.
- Avoid unnecessary wrapper elements.
Which element is appropriate for a self-contained course card?
Progress and Meter
The <progress> element represents completion progress, while <meter> represents a scalar measurement within a known range. These elements communicate different semantics and should not be used interchangeably.
<label for="course-progress">Course progress</label>\n<progress id="course-progress" value="70" max="100">70%</progress>\n\n<label for="disk">Disk usage</label>\n<meter id="disk" min="0" max="100" value="80">80%</meter>- Use progress for task completion.
- Use meter for scalar measurements.
Which element represents completion progress?
Validating HTML
HTML validation tools can identify syntax and structural problems. Validation is useful, but valid markup alone does not guarantee accessibility, good UX, security, or correct application behavior. Testing should include keyboard navigation, screen readers where appropriate, responsive layouts, and real user workflows.
Treat HTML validation as one part of a broader quality process rather than as proof that a page is fully correct.
- Validate HTML during development.
- Combine validation with accessibility and functional testing.
Does valid HTML automatically guarantee accessibility?