How to fix landmark complementary is top level on Wix

Steps for Wix

1. Wix generates its own HTML structure and does not expose raw landmark HTML for editing directly in the Wix Editor.
2. Open the Wix Editor and identify the sidebar/strip that is acting as the complementary region.
3. If the sidebar widget is inside a 'Container Box' or 'Section' that is itself inside another section, drag it out in the Editor layers panel so it is a top-level Section or sits alongside the main content Section.
4. For custom code blocks, open the Velo (Dev Mode) panel and check any `wix-ui-core` or custom HTML components — ensure `<aside>` elements in custom HTML iframes are not nested inside other landmark elements.
5. Use Wix's 'Accessibility Wizard' (Add → Accessibility) to add ARIA labels to sections, and label the sidebar section with a meaningful name.
6. Test with the axe DevTools browser extension on the live or preview URL to confirm the landmark is now top-level.

What is landmark complementary is top level?

Landmarks are special HTML "signposts" that screen readers use to let users jump directly to major sections of a page — the header, main content, navigation, footer, and sidebars. The "complementary" landmark (created by an `<aside>` tag or `role="complementary"`) is meant to mark supporting content that stands on its own alongside the main content, like a sidebar, related-links panel, or promotional widget. The WCAG rule "landmark-complementary-is-top-level" fires when that `<aside>` is placed inside another landmark (for example, inside a `<main>`, `<header>`, or `<section>` with a role), rather than sitting directly inside the `<body>` at the top level of the page.

Screen reader users — including customers with visual impairments — rely on landmark navigation to quickly skip around a page without listening to everything. When a complementary landmark is buried inside another landmark, screen readers either misreport its purpose or completely hide it from the landmark list, making it impossible for these users to find your sidebar content (promotions, related products, trust badges, support widgets) efficiently. This is a WCAG 2.1 Success Criterion 1.3.6 (Identify Purpose) and best-practice landmark structure issue, and repeated accessibility failures create legal exposure under laws like the ADA (US), EAA (EU), and AODA (Canada). Fixing it improves the experience for the roughly 7 million screen reader users in the US alone, reduces legal risk, and signals to Google that your page is well-structured.

See the complete Landmark complementary is top level guide for every platform and the full background.