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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.

TypeOptional
numberYes

isViewable​

Specifies if at least some part of list element is visible in the viewport.

TypeOptional
booleanNo

item​

Item data

TypeOptional
anyNo

key​

Key identifier assigned of the data element extracted to the top level.

TypeOptional
stringNo

section​

Item section data when used with SectionList.

TypeOptional
anyYes

Used by​