36 lines
630 B
TypeScript
36 lines
630 B
TypeScript
/**
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Convert a value to an array.
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_Specifying `null` or `undefined` results in an empty array._
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@example
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```
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import arrify from 'arrify';
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arrify('🦄');
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//=> ['🦄']
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arrify(['🦄']);
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//=> ['🦄']
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arrify(new Set(['🦄']));
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//=> ['🦄']
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arrify(null);
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//=> []
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arrify(undefined);
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//=> []
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```
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*/
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export default function arrify<ValueType>(
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value: ValueType
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): ValueType extends (null | undefined)
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? [] // eslint-disable-line @typescript-eslint/ban-types
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: ValueType extends string
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? [string]
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: ValueType extends readonly unknown[]
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? ValueType
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: ValueType extends Iterable<infer T>
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? T[]
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: [ValueType];
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