---
title: "EvaluationParameters | 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 EvaluationParameters

#### Implements

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

##### Index

### Constructors[](#constructors)

[constructor](#constructor)

### Properties[](#properties)

[fadeDuration](#fadeduration) [isSupportedScript](#issupportedscript) [now](#now) [transition](#transition) [zoom](#zoom) [zoomHistory](#zoomhistory)

### Methods[](#methods)

[crossFadingFactor](#crossfadingfactor) [getCrossfadeParameters](#getcrossfadeparameters)

## Constructors[](#constructors-1)

### constructor[](#constructor)

-   new EvaluationParameters(zoom: number, options?: any): EvaluationParameters[](#constructorevaluationparameters)
    
    #### Parameters
    
    -   zoom: number
    -   `Optional`options: any
    
    #### Returns EvaluationParameters
    

## Properties[](#properties-1)

### fadeDuration[](#fadeduration)

fadeDuration: number

### isSupportedScript[](#issupportedscript)

isSupportedScript: (\_: string) \=> boolean

Implementation of GlobalProperties.isSupportedScript

### now[](#now)

now: number

### transition[](#transition)

transition: [TransitionSpecification](https://docs.maptiler.com/sdk-js/api-reference/types/TransitionSpecification/)

### zoom[](#zoom)

zoom: number

Implementation of GlobalProperties.zoom

### zoomHistory[](#zoomhistory)

zoomHistory: [ZoomHistory](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.ZoomHistory/)

## Methods[](#methods-1)

### crossFadingFactor[](#crossfadingfactor)

-   crossFadingFactor(): number[](#crossfadingfactor-1)
    
    #### Returns number
    

### getCrossfadeParameters[](#getcrossfadeparameters)

-   getCrossfadeParameters(): [CrossfadeParameters](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.CrossfadeParameters/)[](#getcrossfadeparameters-1)
    
    #### Returns [CrossfadeParameters](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.CrossfadeParameters/)