User needs to navigate among a website's main sections while still being able to quickly browse to the subsection of another.
When you hover one of the headlines, the tab folds out at recyclenow.com
- Use when you want the benefits of a normal sidebar menu, but do not have the space to list all options.
- Use when there are more than 2 main sections on a website each with 2 or more subsections.
- Use when you have less than 10 main sections
- Use when you only have two levels to show in the main navigation.
- Each headline / section has a panel, which upon clicking can be expanded either vertically or horizontally into showing its subsections. Vertical Accordion menus are the most frequently used.
- When one panel is clicked it is expanded, while other panels are collapsed.
Accordion menus are often used as a website’s main navigation. In this way, it acts much like Navigation Tabs, as menu items are collapsed when a new panel is clicked. Where the Navigation Tabs are most often used horizontally, Accordion menus are most often used vertically.
Accordion menus can however also function quite well as sub-navigation for a specific section of a website.
At the developer part of adobe.com, the whole page is build up as an accordion menu
The portfolio content of Jason Reeds site is browsed via an Accordion menu.