@loopback/docs/site/apidocs/context.ispromiselike.md

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---
lang: en
title: 'API docs: context.ispromiselike'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/context
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---

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[Home](./index.md) &gt; [@loopback/context](./context.md) &gt; [isPromiseLike](./context.ispromiselike.md)

## isPromiseLike() function

Check whether a value is a Promise-like instance. Recognizes both native promises and third-party promise libraries.

**Signature:**

```typescript
export declare function isPromiseLike<T>(value: T | PromiseLike<T> | undefined): value is PromiseLike<T>;
```

## Parameters

<table><thead><tr><th>

Parameter


</th><th>

Type


</th><th>

Description


</th></tr></thead>
<tbody><tr><td markdown="1">

value


</td><td markdown="1">

T \| PromiseLike&lt;T&gt; \| undefined


</td><td markdown="1">

The value to check.


</td></tr>
</tbody></table>

**Returns:**

value is PromiseLike&lt;T&gt;