# Expansion panels
The v-expansion-panel component is useful for reducing vertical space with large amounts of information. The default functionality of the component is to only display one expansion-panel body at a time; however, with the multiple property, the expansion-panel can remain open until explicitly closed.
# Usage
Expansion panels in their simplest form display a list of expandable items.
# API
# Examples
# Props
# Accordion
accordion expansion-panel hasn’t got margins around active panel.
# Disabled
Both the expansion-panel and its content can be disabled using the disabled prop.
# Focusable
The expansion-panel headers can be made focusable with the prop focusable.
# Inset
inset expansion-panel becomes smaller when activated.
# Model
Expansion panels can be controlled externally by modifying the v-model. Its value corresponds to a zero-based index of the currently opened expansion panel content. If multiple prop is used then it is an array containing the indices of the open items.
# Popout
The expansion-panel also has popout design. With it, expansion-panel is enlarged when activated.
# Readonly
readonly prop does the same thing as disabled, but it doesn’t touch styles.
# Misc
# Advanced
The expansion panel component provides a rich playground to build truly advanced implementations. Here we take advantage of slots in the v-expansion-panel-header component to react to the state of being open or closed by fading content in and out.
# Custom icon
Expand action icon can be customized with expand-icon prop or the actions slot.