31 lines
572 B
Markdown
31 lines
572 B
Markdown
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<!-- Do not edit this file. It is automatically generated by API Documenter. -->
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[Home](./index.md) > [@apextoaster/js-utils](./js-utils.md) > [mustExist](./js-utils.mustexist.md)
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## mustExist() function
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Assert that a variable is not nil and return the value.
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<b>Signature:</b>
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```typescript
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export declare function mustExist<T>(val: Optional<T>): T;
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```
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## Parameters
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| Parameter | Type | Description |
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| --- | --- | --- |
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| val | <code>Optional<T></code> | |
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<b>Returns:</b>
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`T`
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val
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## Exceptions
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NotFoundError
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