ViewToken Object Type
ViewToken object is returned as one of properties in the onViewableItemsChanged callback, for example in FlatList component. It is exported by ViewabilityHelper.js.
Example
{
  item: {key: "key-12"},
  key: "key-12",
  index: 11,
  isViewable: true
}
Keys and values
index
Unique numeric identifier assigned to the data element.
| Type | Optional | 
|---|---|
| number | Yes | 
isViewable
Specifies if at least some part of list element is visible in the viewport.
| Type | Optional | 
|---|---|
| boolean | No | 
item
Item data
| Type | Optional | 
|---|---|
| any | No | 
key
Key identifier assigned of the data element extracted to the top level.
| Type | Optional | 
|---|---|
| string | No | 
section
Item section data when used with SectionList.
| Type | Optional | 
|---|---|
| any | Yes | 
Used by
Last updated: Sep 30, 2025

