---
title: "createPropertyExpression | 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.

# Function createPropertyExpression

-   createPropertyExpression(  
        expressionInput: unknown,  
        propertySpec: [StylePropertySpecification](https://docs.maptiler.com/sdk-js/api-reference/types/StylePropertySpecification/),  
        globalState?: [Record](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.Record/)<string, any\>,  
    ): [Result](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.Result/)<[StylePropertyExpression](https://docs.maptiler.com/sdk-js/api-reference/types/StylePropertyExpression/), [ExpressionParsingError](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.ExpressionParsingError/)\[\]\>[](#createpropertyexpression)
    
    #### Parameters
    
    -   expressionInput: unknown
    -   propertySpec: [StylePropertySpecification](https://docs.maptiler.com/sdk-js/api-reference/types/StylePropertySpecification/)
    -   `Optional`globalState: [Record](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.Record/)<string, any\>
    
    #### Returns [Result](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.Result/)<[StylePropertyExpression](https://docs.maptiler.com/sdk-js/api-reference/types/StylePropertyExpression/), [ExpressionParsingError](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.ExpressionParsingError/)\[\]\>