WCAG 2.4.3: Focus Order
WCAG 2.4.3 Focus Order is a level A success criterion from WCAG 2.0. If a page is navigated in sequence, focus order should preserve meaning. It usually follows the visual reading order.
A keyboard user who lands on the pay button before the address cannot understand the form.
How to test
Tab from the top. Focus should move through the header, then the content, in an order that matches the layout.
How to fix
Remove positive tabindex values and DOM orders that jump.
Example that fails
Tabindex 5 on the footer link makes it the first stop.
Example that passes the check
Focus follows the visual order with no positive tabindex.
Shopify
Remove tabindex values greater than 0 from theme sections.
WooCommerce
Delete positive tabindex from checkout templates.
WordPress
Do not set positive tabindex on blocks.
Wix
Avoid custom code that sets tabindex greater than 0.