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isNotNullish

API Docs

Function: isNotNullish()

isNotNullish<T0>(value): value is T0

Defined in: src/utilities/isNotNullish.ts:12

This function is used to check nullish state of a value passed to it. Nullish means the value being either null or undefined. If the value is found to be nullish, the function returns the boolean false, else it returns the boolean true.

Type Parameters​

T0​

T0

Parameters​

value​

T0 | null | undefined

Returns​

value is T0

Example​

function print(str: string | null) {
	if (isNotNullish(str)) {
		console.log(`the string is $\{str\}`);
	} else {
		console.log(`the string is null`);
	}
}