voluptasmollitia/docs-exp/performance.performancetrace.getattribute.md

Monorepo for the Firebase JavaScript SDK

<!-- Do not edit this file. It is automatically generated by API Documenter. -->

[Home](./index.md) &gt; [@firebase/performance](./performance.md) &gt; [PerformanceTrace](./performance.performancetrace.md) &gt; [getAttribute](./performance.performancetrace.getattribute.md)

## PerformanceTrace.getAttribute() method

Retrieves the value which a custom attribute is set to.

<b>Signature:</b>

```typescript
getAttribute(attr: string): string | undefined;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  attr | string | Name of the custom attribute. |

<b>Returns:</b>

string \| undefined