rc-js-util/docs/rc-js-util.promiserejectnull.md

A collection of TS and C++ utilities to help writing performant and correct applications, achieved through strict typing and (removable) invariant checking.

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

[Home](./index.md) &gt; [rc-js-util](./rc-js-util.md) &gt; [promiseRejectNull](./rc-js-util.promiserejectnull.md)

## promiseRejectNull() function

Returns a Promise of rejection with the supplied error if the value is `null` or `undefined`<!-- -->.

**Signature:**

```typescript
export declare function promiseRejectNull<T>(value: Promise<T> | T, error: unknown): Promise<Exclude<T, null | undefined>>;
```

## Parameters

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

Parameter


</th><th>

Type


</th><th>

Description


</th></tr></thead>
<tbody><tr><td>

value


</td><td>

Promise&lt;T&gt; \| T


</td><td>


</td></tr>
<tr><td>

error


</td><td>

unknown


</td><td>


</td></tr>
</tbody></table>
**Returns:**

Promise&lt;Exclude&lt;T, null \| undefined&gt;&gt;

## Remarks

See [promiseRejectNull()](./rc-js-util.promiserejectnull.md)<!-- -->.