An interactive element that reveals a list of options when clicked, saving space while providing multiple choices. Dropdowns work best with 5-15 options—fewer suggests radio buttons, more suggests search or typeahead. Ensure dropdown menus are keyboard accessible and work well on touch devices.

The ability to navigate and interact with a website using only keyboard controls, essential for accessibility. Test tab order, focus visibility, and keyboard-activated interactions to ensure full functionality. Many users rely on keyboard navigation due to motor disabilities or preference.

The tabindex attribute controls whether an element can receive keyboard focus and in what order. Use 0 to include an element in natural tab order and -1 for programmatic focus only. Avoid positive values because they create confusing navigation order.

A hyperlink pointing to a page on a different website, opening in a new tab by convention to maintain your site's presence. External links to authoritative sources can boost SEO by demonstrating content quality. Balance outbound links with internal linking to keep visitors engaged with your content.

An overlay that displays enlarged images or media while dimming the background, focusing attention on the content. Lightboxes are ideal for galleries and detailed image viewing without leaving the page. Ensure lightboxes are keyboard accessible with clear close mechanisms.