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21 lines
419 B
TypeScript
21 lines
419 B
TypeScript
/**
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Returns a boolean for whether the given type is `null`.
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@example
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```
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import type {IsNull} from 'type-fest';
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type NonNullFallback<T, Fallback> = IsNull<T> extends true ? Fallback : T;
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type Example1 = NonNullFallback<null, string>;
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//=> string
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type Example2 = NonNullFallback<number, string>;
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//=? number
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```
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@category Type Guard
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@category Utilities
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*/
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export type IsNull<T> = [T] extends [null] ? true : false;
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