---
title: "Scope | 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.

# Class Scope

Tracks `let` bindings during expression parsing.

#### Private[](#private)

##### Index

### Constructors[](#constructors)

[constructor](#constructor)

### Properties[](#properties)

[bindings](#bindings) [parent](#parent)

### Methods[](#methods)

[concat](#concat) [get](#get) [has](#has)

## Constructors[](#constructors-1)

### constructor[](#constructor)

-   new Scope(parent?: Scope, bindings?: \[string, [Expression](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Expression/)\]\[\]): Scope[](#constructorscope)
    
    #### Parameters
    
    -   `Optional`parent: Scope
    -   `Optional`bindings: \[string, [Expression](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Expression/)\]\[\]
    
    #### Returns Scope
    

## Properties[](#properties-1)

### bindings[](#bindings)

bindings: { \[\_: string\]: [Expression](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Expression/) }

### parent[](#parent)

parent: Scope

## Methods[](#methods-1)

### concat[](#concat)

-   concat(bindings: \[string, [Expression](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Expression/)\]\[\]): Scope[](#concat-1)
    
    #### Parameters
    
    -   bindings: \[string, [Expression](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Expression/)\]\[\]
    
    #### Returns Scope
    

### get[](#get)

-   get(name: string): [Expression](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Expression/)[](#get-1)
    
    #### Parameters
    
    -   name: string
    
    #### Returns [Expression](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Expression/)
    

### has[](#has)

-   has(name: string): boolean[](#has-1)
    
    #### Parameters
    
    -   name: string
    
    #### Returns boolean