---
title: "FeatureKey | JavaScript maps SDK"
description: "Documentation for MapTiler SDK"
---

> For AI agents: a documentation index is available at [/llms.txt](https://docs.maptiler.com/llms.txt). Markdown versions of all pages are available by appending .md to any URL.

# Type Alias FeatureKey

type FeatureKey \= {  
    [bucketInstanceId](#bucketinstanceid): number;  
    [collisionGroupID](#collisiongroupid): number;  
    [featureIndex](#featureindex): number;  
    [overlapMode](#overlapmode): [OverlapMode](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.OverlapMode/);  
}

##### Index

### Properties[](#properties)

[bucketInstanceId](#bucketinstanceid) [collisionGroupID](#collisiongroupid) [featureIndex](#featureindex) [overlapMode](#overlapmode)

## Properties[](#properties-1)

### bucketInstanceId[](#bucketinstanceid)

bucketInstanceId: number

### collisionGroupID[](#collisiongroupid)

collisionGroupID: number

### featureIndex[](#featureindex)

featureIndex: number

### overlapMode[](#overlapmode)

overlapMode: [OverlapMode](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.OverlapMode/)