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Rich Tree View - Expansion

Handle how users can expand items.

Controlled expansion

Use the expandedItems prop to control the expanded items.

You can use the onExpandedItemsChange prop to listen to changes in the expanded items and update the prop accordingly.

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Track item expansion change

Use the onItemExpansionToggle prop if you want to react to an item expansion change:

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Limit expansion to icon container

You can use the expansionTrigger prop to decide if the expansion interaction should be triggered by clicking on the icon container instead of the whole Tree Item content.

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Imperative API

Change an item expansion

Use the setItemExpansion API method to change the expansion of an item.

  // The DOM event that triggered the change
  // The id of the item to expand or collapse
  // If `true` the item will be expanded
  // If `false` the item will be collapsed
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See the documentation below for a complete reference to all of the props and classes available to the components mentioned here.