node-is-nullish

Example

var isNull = require("is-nullish");
isNull("");
//true
isNull(0);
//false

Installation

npm i is-nullish

Usage

Differences between falsy, is-nullish, and is-empty:

value	typeof value	Boolean(value)	isNull(value)	isEmpty(value)
not defined	"undefined"	false	true	true
undefined	"undefined"	false	true	true
null	"object"	false	true	true
""	"string"	false	true	true
NaN	"number"	false	true	false
0	"number"	false	false	true
false	"boolean"	false	false	false
{}	"object"	true	true*	true
[]	"object"	true	true*	true
function () {}	"function"	true	true*	true
*Objects and functions are nullish unless they have non-nullish enumerable properties.

API Reference

isNull(value) ⇒ boolean ⏏

Kind: Exported function
Params

• value *

Example

var f = function (x) { return x; };
isNull(f);
//true
f.objective = "objectify";
isNull(f);
//false

License

MPL 2.0