isNil

The isNil function checks if the provided value is null or undefined.

Syntax

isNil(value: any): value is null | undefined;

Parameters

Parameter	Type	Description
value	any	Value to be checked

Returns

Type	Description
boolean	True if it is null or undefined

Examples

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

Notes

• Useful for validating absence of value.

References

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