Accordion content containers (and progressive disclosure containers) are similar to tabbed containers in that they allow only a single piece of content to be visible at any given time. Accordion containers typically stack vertically and the title of each section functions also as the tab, and so activating it would toggle the visibility of its content. Unlike tabbed containers however, depending on the configuration of an accordion container, multiple panels may be visible at once. Accordion containers are especially good when stepping through content, for example a checkout process.
There are three different types of accordion containers:
- Progressive disclosure
The standard accordion allows for only one panel to be open at any given time. Opening one panel will shut the others. These are the base for the Rollup style accordion container.
These types of accordion containers allow multiple panels to be open any any given time and often include buttons to "expand all" or "collapse all". A popular example of this would be Gmail's conversation view. This style also works well with nested containers as often found in the Conflict of Interest module in Kuali.
The Linear/Sequential style functions like the Standard style and allows only one container to be open at any given time. The difference here is that these typically function in a linear fashion. A good example of this would be a checkout process. The first panel might be an order summary, followed by shipping information, followed by billing information, followed lastly with a confirmation.
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