---
title: "invert | 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 invert

-   invert(out: [mat4](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.mat4/), a: [ReadonlyMat4](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.ReadonlyMat4/)): [mat4](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.mat4/) | null[](#invert)
    
    Inverts a mat4
    
    #### Parameters
    
    -   out: [mat4](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.mat4/)
        
        the receiving matrix
        
    -   a: [ReadonlyMat4](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.ReadonlyMat4/)
        
        the source matrix
        
    
    #### Returns [mat4](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.mat4/) | null
    
    out, or null if source matrix is not invertible