(input: unknown): input is undefinedChecks whether a value is undefined.
When to use
Use when you need a Predicate guard for values that are exactly
undefined.
Details
Uses input === undefined.
Example (Guarding undefined values)
import { Predicate } from "effect"
const data: unknown = undefined
console.log(Predicate.isUndefined(data))Source effect/Predicate.ts:7673 lines
export function function isUndefined(
input: unknown
): input is undefined
Checks whether a value is undefined.
When to use
Use when you need a Predicate guard for values that are exactly
undefined.
Details
Uses input === undefined.
Example (Guarding undefined values)
import { Predicate } from "effect"
const data: unknown = undefined
console.log(Predicate.isUndefined(data))
isUndefined(input: unknowninput: unknown): input: unknowninput is undefined {
return input: unknowninput === var undefinedundefined
}