Accessibility guides

Doppelgängers in code: Same appearance, different meaning

Strong and em look identical to b and i — but they mean something different. See what the accessibility tree exposes, and why it'll matter more as screen readers get smarter.

Most pages are structural fog for screen readers. Landmarks clear the air for easy navigation.

Semantic tags like header and nav do more than clean up your markup — they create landmarks screen readers use to navigate a page.