getFeatureKey

Resolves a key from a normalized map feature.

Use it when you need a stable identifier for rendering or DOM targeting

Parameters

Parameter	Type	Default	Description
item	MapFeatureData	—	Feature or geometry to inspect
fallback	string | number	—	Fallback when no stable key is found

Behavior

Checks in order:

1. item.id
2. item.properties?.id
3. item.properties?.name
4. fallback

Usage

const key = getFeatureKey(item, fallback)

See feature API