Tabindex0

tabindex="0" is an HTML attribute value used to control how elements participate in keyboard focus. When applied to an element, tabindex="0" makes that element focusable and reachable through keyboard navigation. It enables non-interactive elements, such as divs or spans, to receive focus and be included in the tab sequence, in the order they appear in the document.

In terms of tab order, elements with a positive tabindex (tabindex > 0) are navigated first, in ascending numeric order. Elements with tabindex="0" are then navigated in the order they appear in the document. Elements without a tabindex value that are inherently focusable, such as links or form controls, participate in the tab order according to the browser’s defaults. A tabindex of -1 keeps an element focusable only by script, not via sequential tabbing.

Common uses of tabindex="0" include enabling accessibility for custom interactive components and widgets that are not native focusable elements, such as a custom button implemented with a div or a carousel control. It should be used thoughtfully, as adding focusable elements changes the page’s navigation flow and can affect users relying on keyboards or assistive technologies.

Best practices emphasize using native HTML controls when possible, and applying tabindex="0" mainly for custom components that require keyboard access. Ensure visible focus styles, and implement appropriate keyboard handlers (for example, activating on Enter or Space) to provide an accessible user experience.