isNull

The isNull function checks if the provided value is exactly null.

Syntax

isNull(value: any): value is null;

Parameters

Parameter	Type	Description
value	any	Value to be checked

Returns

Type	Description
boolean	True if it is null

Examples

isNull(null); // => true
isNull(undefined); // => false
isNull(0); // => false

Notes

• Useful for explicitly validating null values.

References

• https://developer.mozilla.org/en-US/docs/Glossary/null