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Variable: isUndefined

const isUndefined: TypePredicate<unknown, undefined>

Defined in: predicate/guards/index.ts:180

Type guard that checks if a value is undefined.

Param​

The value to check

Returns​

True if value is undefined

Example​

import * as R from 'remeda'
import { isUndefined } from 'receta/predicate'

const values: unknown[] = [null, undefined, 0, '']
R.filter(values, isUndefined) // => [undefined]

See​

  • isNull - for null check
  • isNullish - for null or undefined check
  • isDefined - for non-nullish check